Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Denon DRA-400 Tuner Amp FULLY WORKING, TESTED.

Denon Mono Endstufe POA-4400 A befindet sich in einem dem Alter entsprechenden guten Zustand. Da Privatverkauf ohne Garantie und Rcknahme.

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver ???? Works. Condition is Used. Shipped with USPS Ground Advantage.

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Artikelbeschreibung Sie bieten hier auf ein Kassettendeck der Marke Denon mit der Herstellerbezeichnung DRM 400 Das Kassettendeck funktioniert ohne Probleme. Optisch weist das Gerät einige normale Gebrauchsspuren auf(Siehe Angebotsbilder). Selbstverständlich wurde das Gerät nochmals gereinigt und gewartet. Es wird ein Netzkabel aber KEINE Fernbedienung oder Bedienungsanleitung mitgeliefert. Technische Daten (Auszug) Eingangslevel einstellbar für verbesserte AufnahmenBIAS Level einstellbar Dolby B, C zur Rauschunterdrückung Kopfhörerausgang vorneBalance Level einstellbar Versand : Versand erfolgt nach Zahlungseingang. Der Versand erfolgt als DHL/Hermes Paket und kann erfahrungsgemäß 2-3 Werktage dauern. Gewährleistung : Natürlich besteht eine 1-jährige Gebrauchtartikelgewährleistung auf das Gerät. Schauen Sie doch auch unsere anderen Angebote an!

Denon AVR-X2400H Integrated Network AV Receiver - AS IS - Immediate Turns OffFor Parts or Repair NOT Working condition, includes power cordSee pictures for qualityShipped with FedEx, UPS or USPS Priority Mail (based on zip code) - We Ship FAST!Thank you for looking~eMarket Square** Please visit our eBay store by clicking on the link under Seller Information **

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Denon AH- D400; Highend Studio Kopfhörer; neuwertig mit OVP und Anleitung. Ich verkaufe sehr gut erhaltene Denon AH D400. Ich muss meine Sammlung leider etwas schmälern. Leider kann man nur ein paar Kopfhörer zur gleichen Zeit tragen. Und im Schrank liegend sind sie zu schade. Laut Datenblatt bieten die Treiber eine Empfindlichkeit von 115 Dezibel und decken den Bereich von fünf bis 37000 Hertz ab. Die Impedanz liegt bei 64 Ohm, die maximale Eingangsleistung bei 1300 Milliwatt. Dank geschlossener Gehäuse werden Außengeräusche effektiv abgeschottet, umgekehrt läuft man nicht Gefahr, seine Umwelt mit der eigenen Musik zu stören. Mit seinem auffälligen, futuristischen Äusseren wirken der Urban Raver und auch dessen Nutzer wie von einem andern Stern. Einerseits durch seine sehr breite Bauweise und den Hochglanzlook, andererseits durch die im aktiven Modus blau hinterleuchteten Elemente. Bei Fragen bitte melden. Privatverkauf: Keine Rücknahme, keine Garantie, keine Haftung

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Denon DRM-400 Stereo Kassettendeck , funktionstüchtig,. Gebe ein Stereo Kassettendeck der Marke Denon DRM-400 ab. Es ist ein hochwertiges Gerät, welches voll funktionstüchtig ist.Optisch ist es in einem sehr guten Zustand. (normale Gebrauchsspuren) Anleitung ist vorhanden.BesonderheitenHX PRO /-2-Motor Mechanismus /-Funktionstasten /-Counter /-Dolby B, CKopfhörerbuchse /-Counter Reset/Memory /- Dolby Nr. On/Off B/C /-MPX FilterRec Return /-Bias Fine Regler /-Balance Regler /-Line In / Line Out Cinch Buchse

Selling my Denon DP-400 Turntable which comes fully boxed with everything when new. Great condition and plays perfectly. Has a couple of very minor light scratches on the lid. The reason for sale is simply because I have gone down the vintage route for my set up and it is just not getting used. Can be plugged to an external pre amp or plugged to an active speaker set up using the built in pre-amp. More spec online.. I am based near Heathrow Terminal 5 and will show it working to any buyers who wants to collect.

This auction is for 1 x Denon TU-400 L Radio Tuner. This has a few scuffs on the top bit condition is goof Collection from Hayes middx preferred Im havung a clear out of some old audio equipment please check my other items

Demon avr-x4000 integrated network av receiver ampli-tuner audio/video reseau.

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Denon AH- D400; Highend Studio Kopfhörer; neuwertig mit OVP und Anleitung. Ich verkaufe sehr gut erhaltene Denon AH D400. Ich muss meine Sammlung leider etwas schmälern. Leider kann man nur ein paar Kopfhörer zur gleichen Zeit tragen. Und im Schrank liegend sind sie zu schade. Laut Datenblatt bieten die Treiber eine Empfindlichkeit von 115 Dezibel und decken den Bereich von fünf bis 37000 Hertz ab. Die Impedanz liegt bei 64 Ohm, die maximale Eingangsleistung bei 1300 Milliwatt. Dank geschlossener Gehäuse werden Außengeräusche effektiv abgeschottet, umgekehrt läuft man nicht Gefahr, seine Umwelt mit der eigenen Musik zu stören. Mit seinem auffälligen, futuristischen Äusseren wirken der Urban Raver und auch dessen Nutzer wie von einem andern Stern. Einerseits durch seine sehr breite Bauweise und den Hochglanzlook, andererseits durch die im aktiven Modus blau hinterleuchteten Elemente. Bei Fragen bitte melden. Privatverkauf: Keine Rücknahme, keine Garantie, keine Haftung

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Demon avr-x4000 integrated network av receiver ampli-tuner audio/video reseau.

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Denon DP-400 Turntable - Black. Superb condition. Only purchased brand new in May 2022 for 529 Lid, has skight scratches. Lovely turntable with nice sound Comes with original packaging

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.

Demon avr-x4000 integrated network av receiver ampli-tuner audio/video reseau.

href=https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css> Denon DP-400 - Hi-Fi Turntable with Speed Auto Sensor - Black- Good condition Description Denon DP-400 - Hi-Fi Turntable with Speed Auto Sensor - Black- Good condition ?Note only for products that are turned on.?????????????Products that do not turn on are not eligible? The power supply for this product is AC100V 50/60Hz.A transformer may be required in some countries.Please prepare the transformer on the purchase side. Outlet specifications??A typeIf it is different from A type, a converter is required. You in areas other than 100V.If you use the transformer I sell, you can use it in areas other than 100V.ebay.comhttp://www.ebay.com/itm/373547463184ebay.ukhttps://www.ebay.com/itm/373547520813 ebay.euhttps://www.ebay.com/itm/373547520926ebay.auhttps://www.ebay.com/itm/373547520958We also sell other than ebay.com.Please contact us if you would like to purchase.If you have any other questions, please contact me.* It may not be possible in some areasPlease consider carefully.Payment ??We accept payment by PayPal only. ??Please payment within ??3 days after the auction closed. Shipping free shippingShip by express EMS?or DHL or FedExWe will deliver by the fastest delivery method. Shipment with damage / loss insuranceWith tracking number ??(10-15 days to US) ??(10-30days or more to Other countries) Terms of Sale ??[About returned goods]????Returns are accepted only if the item was ? not the item described in the aution. [Return] Returned goods for personal reasons will not be accepted. International Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Provided by HARU

Denon DRA 400 Precision Audio Component AM/FM Tuner Stereo AMP Receiver Used, works - Bought at an estate sale, history unknown Tape Deck Not Included Video available of working FM and Cassette under extra kart parts youtube channel - message for link Below description found online and buyer must confirm accuracy- reference only - Info from gamma electronics - XYZ Manufacturers Specifications FM Tuner Section: Usable Mono Sensitivity: 10.3 dBf. S/N Ratio: Mono, 75 dB; stereo, 72 dB. THD at 1 kHz: Mono, 0.1%; stereo, 0.2%. Capture Ratio: 1.2 dB. Image Rejection: 45 dB. AM Suppression: 60 dB. Stereo Separation, 1 kHz: 50 dB. Frequency Response: 10 Hz to 15 kHz, +0.2,-1.5 dB. AM Tuner Section: Usable Sensitivity: 15 dB. S/N Ratio: 55 dB. Amplifier Section: Power Output: 40 watts per channel, 8 ohms, 20 Hz to 20 kHz (50 watts, 1 kHz, 4 ohms). THD: 0.02%, 8 ohms. Damping Factor: 80, 1 kHz, 8 ohms. Input Sensitivity: MM phono, 2.5 mV; MC phono, 0.25 mV; high level, 150 mV. Maximum Phono Input Level: MM phono, 200 mV; MC phono, 20 mV. Frequency Response: Phono, RIAA 0.5 dB; high level, 20 Hz to 20 kHz, 0.5 dB. S/N Ratio: MM phono, 80 dB; MC phono, 62 dB; high level, 96 dB. Tone Control Range: 10 dB at 50 Hz and 10 kHz. Subsonic Filter Cutoff: 18 Hz, 6 dB per octave. General Specifications: Power Consumption: 130 watts. Dimensions: 17.1 in. (43.4 cm) W x 4.4 in. (11.2 cm) H x 16.1 in. (40.8 cm) D. Weight: 19.8 lbs. (9.0 kg). Price: $399.95. Company Address: 61 Law Dr., Fairfield, N.J. 07006. As so often happens with advances in audio technology, new features are first incorporated in top-of-the-line separate components which are beyond the reach of all but the most affluent of audio enthusiasts. Later on, these features filter down to high-powered, high-priced all-in-one receiv ers, where a larger audience is potentially available. Finally, they are incorporated into relatively low-cost, medium-powered receivers that just about anyone interested in good sound can afford. The Denon DRA-400 is a good example of a receiver which has benefited from technology first found in higher priced units. This receiver employs crystal-controlled, frequency-synthesized tuning for accuracy and has a five-station preset capability with battery-operated memory backup. Not only does the phono preamplifier section incorporate both moving-magnet and moving-coil inputs (the latter at an input impedance of 100 ohms), but the phono preamp-equalizer section has a direct-coupled input. The power amplifier section employs a non-switching biasing circuit for the elimination of so-called switching and notch distortion at the output stages. These refinements would have been found only on more expensive components just a few years ago. The front panel of the Denon DRA-400 is neatly divided into highly functional upper and lower sections. The upper section contains the power on/off switch, a numeric display of station frequency, a stereo indicator light, a signal-strength LED indicator, up and down tuning buttons, the five preset buttons and their memory switch, program selector pushbuttons, and a large, rotary master-volume control. The signal-strength indicator takes the form of a go-no-go indicator, rather than a signal-strength meter: It lights when the incoming signal strength is deemed adequate and does not light when weaker signals are received-an interesting approach but not very useful. Controls in the lower section are normally covered by a swing-down hinged door, since they are used less frequently than those just described. Behind the door panel are a stereo headphone jack; a pair of speaker selector buttons; bass, treble and balance controls; a three-position monitor/ copy switch; a subsonic filter switch; a stereo/mono switch (associated with FM reception); an MM/MC phono switch, and a loudness on/off switch. The rear panel of the DRA-400 is equipped with the usual 75- and 300-ohm FM antenna terminals, phono and high level input terminals, two pairs of tape in/out jacks, two pairs of color-coded speaker connection terminals, a chassis ground terminal, and a pair of a.c. convenience outlets (one switched, one unswitched). Instead of the usual AM loop stick antenna, a more elaborate, true AM loop antenna is packed with the receiver as a separate item; its two leads must be connected to the appropriate AM and ground terminals on the back of the set. The pivotable loop antenna is best snapped into an antenna holder during receiver installation so the antenna can still be rotated for best AM reception. Since this loop antenna forms part of the input-stage tuned circuit, the owners manual suggests that even if an outdoor AM antenna is used (because of inadequate signal strength), the loop antennas leads should remain connected to their appropriate terminals, in parallel with the outdoor antenna leads. Tuner Measurements Usable mono FM sensitivity fell short of published claims, measuring 16 dBf (3.47 V across 300 ohms). In stereo, sensitivity was limited by muting and stereo thresholds, which were set to 32 dBf (21.9 V). For 50-dB quieting in mono, an input signal strength of 19.5 dBf (5.2 V) was required; for stereo, a signal strength of 42 dBf (69.2 V) was needed. Plots of quieting and distortion (at 1 kHz) versus signal strength are shown in Fig. 1. Signal-to-noise in mono, at 65 dBf of input signal, measured 75 dB as claimed; in stereo it was 72 dB, also exactly as claimed. Harmonic distortion in mono measured 0.17% for a 1-kHz signal, modulating the r.f. carrier by 100%. Total harmonic distortion actually decreased to 0.085% in stereo for the same signal and modulation levels. Distortion in mono and stereo for other audio modulating frequencies is shown in Fig. 2. Although measured distortion was low at high frequencies in stereo and mono, I must point out that these figures were obtained using a bandpass filter with a steep roll-off above 15 kHz (the highest broadcast program frequency). Without the filter, subcarrier products were only some 42 dB below 100% modulation levels.