This unit is in beautiful condition and looks awesome all lit up (meter lights are a green tone) This is a highly sought after model, great for the high end audio lover. If you have any questions please ask. This Proton AA-1150 is a powerful amplifier that will elevate your audio experience. With dual mono design and large VU meters, this audiophile-grade amplifier is perfect for those who value high-quality sound. The sleek black color and beautiful design make it a great addition to any audio setup. 50-150watt power on demand system. This amplifier is compatible with a variety of audio systems and is specifically designed for use with Proton products. Its model number, AA-1150, is well-known in the audiophile community for its high-quality performance. Dont miss out on the chance to upgrade your sound system with this amazing Proton AA-1150 amplifier.

Listed as for parts or not working because item has been stored for at least a couple decades and unable to thoroughly test and unfamiliar with the device so I don’t want to guarantee that’s is 100% fully functional and mislead buyers. Also when I click radio nothing was happening. I know shipping is $100 but that’s about how much it costs when I just sold it to another buyer and then I had to refund the buyer. This weighs like 35 pounds and is extremely heavy.

************** German ************** SELTENER UND LEGENDR PROTON VORVERSTRKER Der AP-1000 ist ein groartiger Vorverstrker mit wunderschnem Klangbild, Detailreichtum, Mitteltnen und tiefen, klaren Bssen. Der Klang des Proton AP-1000 ist sehr gefllig und verfgt ber eine Mitteltonregelung. Groartig klingender und musikalischer Vorverstrker mit hervorragender Stereotrennung und Dual-Mono-Design. Es erzeugt einen klaren und hochauflsenden Klang und behlt gleichzeitig etwas Krper und Wrme, ohne die raue, leblose, kalte Sterilitt anderer moderner hochauflsender Gerte. Subwoofer-Ausgnge mit 2 Crossover-Punkten 75 und 150. Pre-Out-, Sub-Out- und Hochpass-Ausgnge, die sich hervorragend fr Subwoofer oder fr Bi-Amping der Lautsprechereingnge eignen, falls vorhanden. MM- und MC-Phono mit Kapazittsschalter. Alle vergoldeten Anschlsse. Schalten Sie um, um die Klangregelung zu deaktivieren. Groartig klingende Phono-Sektion. Sehr warmer Klang, dennoch artikuliert, transparent und detailliert. Schne tonale Balance. Neutraler Mitteltonbereich. Groe Klangbhne dank Dual-Mono-Design. Sie knnen diesen Vorverstrker in allen preisgnstigen Audioanwendungen verwenden und er wird groartig klingen. Spezifikation : Proton-Stereo-Vorverstrker Modell AP-1000. Frequenzgang: 20 Hz bis 20 kHz +/-0,2 dB Gesamte harmonische Verzerrung: 0,1 % Eingangsempfindlichkeit: 0,2 mV (MC), 2,5 mV (MM), 150 mV (Line) Signal-Rausch-Verhltnis: 70 dB (MC), 91 dB (MM), 103 dB (Line) Ausgang: 21 V (Pre Out Max) Bassregelung (bei 100 Hz, Boost/Cut): +/-10 dB/-10 dB Hhenregelung (bei 10000 Hz, Boost/Cut): +/-10 dB/-10 dB Infraschallfilter (10 Hz): -4 dB Zustand/Gebrauchsspuren/Funktion siehe Bilder. Informelle Informationen zum Gert und den Bildern: Das Gert, das Sie erhalten, ist immer das, was Sie auf den Bildern sehen. Weiteres Zubehr wird, sofern verfgbar, immer im Angebot aufgefhrt. Gebrauchte Gerte sind mglicherweise nicht ganz neu, das mssen Sie ebenfalls akzeptieren. Ich werde versuchen, es so genau wie mglich zu beschreiben. Hervorragender Arbeitszustand mit einigen kleineren Gebrauchsspuren. Einzelheiten siehe Bilder. Am liebsten wre es mir, wenn der Kufer den Verstrker persnlich abholt. Versand ist jedoch auch mglich, ich bernehme jedoch keine Verantwortung fr Schden, die durch den Versand entstehen. ************** English ************** RARE AND EXCELLENT PREAMPLIFIER The AP-1000 is a great preamp with beautiful soundstaging, detailing, midrange and deep clear bass. The sound of the Proton AP-1000 is very pleasing and includes a midrange control. Great sounding and musical preamp with excellent stereo separation and with the dual mono design. It manages to be clear and high-def sounding while maintaining some body and warmth without the harsh, lifeless cold sterility of other modern high-res units. Subwoofer outputs with 2 crossover points 75 and 150. Pre-out, sub-out, high-pass outputs which are great for subs or to biamp a speakers inputs if they have it. MM and MC phono with capacitance switch. All gold platted connections. Tone control defeat switch. Great sounding Phono section. Very warm sounding yet articulate, transparent, and detailed. Nice tonal balance. Neutral mid range. Wide sound stage attributed to its dual mono design. You can use this preamp in any priced audio applications and it will sound great. Specification : Proton Stereo Preamplifier Model AP-1000. Frequency response: 20Hz to 20kHz +/-0,2dB Total harmonic distortion: 0.1% Input sensitivity: 0.2mV (MC), 2.5mV (MM), 150mV (line) Signal to noise ratio: 70dB (MC), 91dB (MM), 103dB (line) Output: 21V (Pre out Max) Bass Control (at 100 Hz, Boost/Cut): +/-10dB/-10dB Treble Control (at 10000 Hz, Boost/Cut): +/-10dB/-10dB Infrasonic Filter (10 Hz): -4dB Condition/signs of use/function see pictures. Informal information about the device and the images: The device you receive is always what you see in the pictures. Additional accessories are always listed in the offer if available. Used equipment may not be brand new, so you have to accept that. Ill try to describe it as accurately as possible. Excellent working condition with some minor marks as can be seen in the picture. I would prefer buyer to personally pick up the amplifier, however shipping is possible but I wont be responsible for any damages arising out of shipping.

PROTON 550 BY NAD STEREO AMPLIFIER EXCELLENT WORKING CONDITION ,SERVICED ,SOME MINOR MARKS

Der Amplifier ist aus Nachlasser ist in einem gebrauchten Zustandfunktioniert altersbedingte Gebrauchsspuren sind vorhanden es wird alles versendet was auf den Bilder zusehen ist. Privatverkauf keine Rücknahmeweitere Details siehe Bilder

PROTON D1200 Getestet, sauber und in ausgezeichnetem Betriebszustand!!! Beschreibung : Der Hochstromverstärker Proton D-1200 wurde sorgfältig mit Fokus auf Klangqualität entwickelt. Ein sehr seltener Verstärker, gebaut wie die begehrten Monoblöcke von Dynaco McIntosh, Marantz und anderen, aber verpackt in einem kompakten und leistungsstarken Paket. Ob als Ergänzung zu einem vorhandenen Audio- oder Videosystem oder als Teil eines völlig neuen Systems, Sie werden mit Sicherheit die Klarheit, Detailtreue und Leistungstiefe bemerken, die Proton-Produkte unabhängig vom Preis zu den besten der Welt machen. Der D1200-Leistungsverstärker von Proton verfügt über ein Dynamic Power on Demand (DPD)-Schaltungsdesign, das ihm einen außergewöhnlichen dynamischen Headroom von 7,3 dB bietet. Das DPD-System von Proton ist für einige der höchsten Ausgangsleistungen verantwortlich, die wir je von einem Verstärker gemessen haben. Spezifikationen : Ausgangsleistung: 100 Watt pro Kanal an 8 ? (Stereo), 1800 Watt an 2 ? (Mono) Frequenzgang: 20 Hz bis 20 kHz Gesamte harmonische Verzerrung: 0,02 % Dämpfungsfaktor: 250 Eingangsempfindlichkeit: 1V Signal-Rausch-Verhältnis: 120 dB THD bei Nennleistung 0,02 % Lautsprecherlastimpedanz: 2 ? bis 8 ? Abmessungen: 420 x 122 x 395 mm Gewicht: 15 kg IHF-Standard 20 ms Dauer: 540 W (8 Ohm) 1000 W (4 Ohm) 1500 W (2 Ohm) 100ms Dauer: 450 W (8 Ohm) 650 W (4 Ohm) 800 W (2 Ohm) 200 ms Dauer: 380 W (8 Ohm) 500 W (4 Ohm) 520 W (2 Ohm) Über den Klang... Da ich der landläufigen Meinung, dass gute Endstufen „anders“ klingen, nicht zustimme, kann ich zu diesem Thema nicht viel sagen. Bei diesem Verstärker waren die Auswirkungen der Hochpegeltransienten, die häufig das 6-dB-DPD-Licht zum Leuchten brachten und zu Messwerten über 400 Watt führten, geradezu atemberaubend. Nicht viele „100-Watt“-Verstärker können dieses Leistungsniveau erreichen. Der D1200 ist in Schwarz gehalten und verfügt über zwei große Leistungsmesser. Die logarithmischen Skalen der Messgeräte decken einen Bereich von einigen Milliwatt bis zu vielen hundert Watt (in 8 Ohm) ab, und die Zeiger haben eine schnelle Reaktionszeit, um Programmspitzen zu folgen. Auf der Rückseite des Verstärkers befinden sich isolierte Polklemmen-Lautsprecheranschlüsse, Eingangsbuchsen und ein Stereo/Mono-Schalter. Der D1200 ist 16-1/2 Zoll breit, 14-1/4 Zoll tief und 4-1/4 Zoll hoch und wiegt 35 Pfund. Kenner wissen, wovon ich spreche! Klicken Sie auf den Link unten, um eine vollständige Rezension des Proton D1200 zu erhalten http://www.hifi-classic.net/review/proton-d1200-165.html https://www.makern.de/2009/06/02/proton-d1200 Ich habe mehrere Proton D1200 bei eBay verkauft und alle Käufer sind mit ihrem Kauf zufrieden. *************English ************* Tested, Clean and in Excellent working condition !!! Description : The Proton D-1200 high current amplifier has been carefully developed with complete emphasis on the quality of sound. A very rare amplifier constructed like the sought after Mono blocks of Dynaco McIntosh, Marantz and others but put together in one compact and Powerful package. Whether adding to an existing audio or video system or as part of an all new system, you are certain to notice the clarity, detail and depth of performance which make Proton products among the best in the world, regardless of price. Proton’s D1200 power amplifier features a Dynamic Power on Demand (DPD) circuit design that gives it an extraordinary dynamic-headroom rating of 7.3 dB. Proton’s DPD system is responsible for some of the highest power outputs we have measured from any amplifier. Specifications : Power output: 100 watts per channel into 8? (stereo), 1800 watts into 2? (mono)Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.02% Damping factor: 250 Input sensitivity: 1V Signal to noise ratio: 120dB THD at rated power 0.02% Speaker load impedance: 2? to 8? Dimensions: 420 x 122 x 395mm Weight: 15kg IHF Standard 20ms duration : 540W (8 ohms)1000W (4 ohms)1500W (2 ohms) 100ms duration: 450W (8 ohms)650W (4 ohms)800W (2 ohms) 200ms duration: 380W (8 ohms)500W (4 ohms)520W (2 ohms) About the sound . . . well, since I do not subscribe to the popular notion that good power amplifiers sound “different” from each other, there is not much I can say on that subject. However, with this amplifier, the impact of the high-level transients—which often lit the 6-dB DPD light and produced meter readings of more than 400 watts— was nothing short of stunning. Not too many “100-watt” amplifiers can match that performance. The D1200 is finished in black, with two large power meters. The meters’ logarithmic scales span a range from a few milliwatts to many hundreds of watts (into 8 ohms), and the pointers have a rapid response time to follow program peaks. Insulated binding-post speaker connectors, input jacks, and a stereo/mono switch are in the rear of the amplifier. The D1200 measures 16-1/2 inches wide, 14-1/4 inches deep, and 4-1/4 inches high and weighs16 kg. Connoisseur know what Im talking about! Check the link below for a complete review of Proton D1200 http: //www.hifi-classic.net/review/proton-d1200-165.htmlhttps://www.mackern.de/2009/06/02/proton-d1200 I have sold few Proton D1200 on ebay and all the buyers are happy with the purchase.

Listed as for parts or not working because item has been stored for at least a couple decades and unable to thoroughly test and unfamiliar with the device so I don’t want to guarantee that’s is 100% fully functional and mislead buyers. Also when I click radio nothing was happening. I know shipping is $100 but that’s about how much it costs when I just sold it to another buyer and then I had to refund the buyer. This weighs like 35 pounds and is extremely heavy.

Proton AA-1150 Dual-Mono Power Amplifier Actually it powers on, meters and one channel work great, the other channel does work, but has static or noise. In very good condition, minor scuffs or marks. See photos for details. Listed for parts or repair, no returns or refunds. Lower 48 shipping only.

German Hallo, Ich biete einen Proton-Verstärker an. Der Verstärker ist für sein Alter technisch und optisch in einem guten Zustand. Es gibt natürlich Gebrauchsspuren, die auf den Fotos deutlich zu erkennen sind. Ein einfacher, aber sehr guter Verstärker mit perfekter Klangqualität. Phono-Anschluss und 2x 20 Watt Ausgangsleistung. Ein Versand ist möglich, ich würde aber Interessenten empfehlen, vorbeizukommen, zu besichtigen und abzuholen. Marke: ProtonModell: AM-200Ausgangsleistung: 20 W (unverzerrt)Abmessungen (BHD): 420 x 86 x 280 mm / 16,5 x 3,4 x 11 ZollStromart und Spannung: Wechselstromversorgung (AC) / 220 VoltGewicht: 8kg Hergestellt in Taiwan Private Werbung, keine Garantie, Rücknahme oder ähnliches.Wenn Sie Fragen zum Artikel haben, kontaktieren Sie mich bitte Der Verstärker ist für sein Alter technisch und optisch in einem guten Zustand. Es sind minimale Gebrauchsspuren vorhanden, die auf den Fotos deutlich zu erkennen sind. *************************************************************************** English *************************************************************************** Hello, I am offering a Proton amplifier. The amplifier is in good technical and optical condition considering its age. There are of course signs of wear and tear, which can be clearly seen in the photos. A simple but very good amplifier with perfect sound quality. Phono connection and 2x 20 watts output power. Shipping is possible, but I would recommend that interested parties come by, inspect and pick up. Brand: ProtonModel: AM-200Output power: 20 W (undistorted)Dimensions (WHD): 420 x 86 x 280 mm / 16.5 x 3.4 x 11 inchesCurrent type and voltage: Alternating current supply (AC) / 220 voltsWeight: 8kg Made in Taiwan Private advertising, no guarantee, return or similar.If you have any questions about the article, please contact me The amplifier is in good technical and optical condition considering its age. There are minimal signs of wear and tear, which can be clearly seen in the photos.

All functions work good but cd tray need help to open, it plays cds, cassette tape works, all inputs work, as is, no returns

This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

All Channels Tested and Working. I Also Do One Final Test On All Channels Before Shipping Out. AA-2580 Features ? 80 watts per channel at 8 ohms ? 100 watts per channel at 6 ohms ? 120 watts per channel at 4 ohms ? High current output ? Ultra-quiet thermal sensing two-speed cooling fan ? Very low THD at 0.03% ? 20 Hz - 20 kHz < +/- 0.5 dB frequency response ? 100 dB signal to noise ratio ? 60 dB channel separation at 10 kHz ? 1 Vrms input sensitivity ? DC drift, thermal and short protection ? +5 volt remote power on/off ? Gold-plated RCA inputs ? Five-way gold-plated speaker binding posts

Proton Verstärker-Amplifier AM-656 Veren Hifi. Tested. stärker Selt 12 kg! RAR Das Gerät wurde getestet. Alle Kanäle funktionieren soweit. Source lässt sich durchschalten. Das Display ist ohne Funktion. Daher konnte nicht jede Einstellung getestet werden. BASS TREBLE und BALANCE lassen sich einstellen. Speaker A+B sind funktionsfähig. Das Gerät lässt sich nutzen aber ohne Display sind die ausgewählen Einstellungen nicht zu sehen. Daher wird das Gerät als defekt verkauft. Gehäuse weist leichte Gebrauchsspuren auf. Einige Gehäuseschrauben fehlen. Lieferung ohne Zubehör. Bitte beachten Sie das die Bilder Bestandteil der Auktion sind. Aufgrund der Lichtverhältnisse bei der Produktfotografie und unterschiedlichen Bildschirmeinstellungen kann es dazu kommen, dass die Farbe des Produktes nicht authentisch wiedergegeben wirdJedes Gerät ist mit einem Garantiesiegel versehen. Eine Rückgabe oder Umtausch ist ausnahmlos mit einem intakten Siegel möglich. Geräte die geöffnet wurden sind von der Rückgabe ausgeschlossen. Alle Geräte wurden von uns getestet und bewertet. Sollte es dennoch ein Problem geben zögern Sie nicht und Kontaktieren uns. Wir finden eine Lösung! Auf alle Geräte erhalten Sie 12 Monate Gewährleistung!

The pictures you see are the exact item you will receive with only accessories you see and item in the pictures. If not in the pictures it is not included in this particular item. Item is being sold Used . Please refer to pictures for details. If you have any questions or concerns feel free to message thank you. NO P.O Boxes or APOS lower 48 only Lower bin

This Proton AI-3000 II audio system is a versatile and high-quality integrated amplifier that is perfect for any audio setup. With a range of audio inputs including phono/turntable, video, and pre-out, you can easily connect all your favorite devices. The amplifier features raw cable speaker jacks for easy hookup and great sound quality. In addition to its excellent audio features, this Proton AI-3000 II also has a sleek black design that looks great in any environment. Whether you're a music aficionado or just looking for a great amplifier, this Proton AI-3000 II is a great choice. Listed as for parts or not working because item has been stored for at least a couple decades and unable to thoroughly test and unfamiliar with the device so I don’t want to guarantee that’s is 100% fully functional and mislead buyers.

Proton AA-1150 power amp Black Large illuminated meters Great overall condition 50 watts per channel into 8 ohms Never been opened Amazing amp outstanding clarity, depth, balance

*UPDATE* I realized from viewing my own advert that my pictures weren’t really representative of how bad the case of this amplifier looked. I didn’t want the buyer of this amp to be disappointed by this and so I removed it and gave it a refresh of flat black primer and paint. The last 4 pictures are new and will give you a better idea of what it looks like. I’ve personally owned this amplifier for 30 years. It has been used off and on again in rotation and has always worked flawlessly. The chassis is not perfect but the front glass is clean. I’ve never had to have this repaired. Its sound is astonishing when compared to other amps and receivers from the same era. They have all come and gone and this has stayed with me. I’ve owned so so so many amps, and this wiped the floor with a good many of them. Here’s some extra generic info I pulled from someone else’s advert. A rare, high-quality vintage amplifier! Don’t be fooled by the 50wpc rating. Proton’s Dynamic Power on Demand gives it a claimed 7dB of headroom which, as Julian Hirsch said in his June 1988 review, makes it, “quite possibly the world’s most powerful “50W amplifier””. It’s a dual mono design and offers exemplary performance and musicality. Notably, Julian Hirsch found that it exceeded almost all of its published specs (shown below). Manufacturer’s published specifications: Rated power output: (20hz-20khz into 8ohms) 50w per channel Dynamic power: (at 8ohm/4ohm/2ohm) 280w/450w/600w IHF standard 20ms duration 100ms duration 220w/300w/350w Dynamic Headroom: (at 8ohm/4ohm/2ohm) 7db THD at rated power 0.02% Dimensions: 16.5” W x 14.5” D x 4.25” H Weight 25 lbs

Used amp, in working condition but certainly needs a tune-up and a good cleaning.I dont use it anymore, owned it for about 30 years now, currently dont need it. Its priced for someone to recondition and love or resell. IT IS NOT MINT but it 100% works.Right channel drops out at low volume, but I think thats dirty RCAs. Unit is currently boxed and ready to ship out.

Beautiful condition proton aa1150 power amplifier.50 watts per channel in to 8 ohm,100 into 4 ohm.2 ohm stable with 800 watts peak power.the amp works as it should and looks good doing it.extra large vu meters.amp has very little marks or scratches.come with a printed manual.will be double boxed.

Beautiful condition proton aa1150 power amplifier.50 watts per channel in to 8 ohm,100 into 4 ohm.2 ohm stable with 800 watts peak power.the amp works as it should and looks good doing it.extra large vu meters.amp has very little marks or scratches.come with a printed manual.will be double boxed.

Proton D1200 power amplifier Nice condition, Better Than New Inside If you want to save a bundle on this amp contact me using the blue letters on the last picture THE AUDIO PRIZE AWAITS YOU Here is another fine offering from the audio labs of Morris Electronic Repair Boutique This proton D1200 is extremely rare. At 100 Watts / 8 and the ability at music passages to deliver up to 1,600 Watts of audio power for short duration makes this amp perform super well with most speakers. It sports a dual mono power supplies and a single power supply that runs the 100 watts out. At large music passages. the high current & voltage mono power supplies kick in. BUT WAIT THERES MORE This unit has been completely recapped, excluding the rail caps, which checked better than new. The bias setting have been set to factory specs. The VU meters lamps have been replaced with LEDs so they will last a lifetime. Also new speaker binding post have been install that are super rugged. and a IEC power connector, and will come with a generic IEC power cord. Also new Tiffany RCA input jacks have been installed. This unit have undergone hours of testing and burn in under load, driven by a Harman Kardon CD 491 player into a Harmon Kardon 825 preamp into Paradigm B/P Espirit 300 w Towers. Please Note: I only ship in the US. No international shipping! As always I pack everything with the best of materials, so as to thwart the gorilla UPS handlers. It will arrive alive and unscathed. This amp is very heavy and there is a small additional charge reflected in shipping cost for I pay a lot for proper packing materials. But you will appreciate the effort when they arrive undamaged. The service manual & owner manual will be included (reproduced from original) along with amplifier spec sheets on each amp after testing. And will carry a one year iron clad warranty against all parts & labor and I will pay the shipping both ways in the unlikely event an issue should occur. Thank you, for reading all the verbiage, Any issues you should have I take care of them, Pronto, Period! No Ifs, Ands or Buts. This is why I maintain a 100% positive feedback. I answer all submitted questions.

nice powerfull amp..make offer--untested clean

This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

This is a reprint of an Audio Review from 1988! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. . You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.