Description
Onkyo Integra A-819Xx Integrated Amplifier Black used JAPAN import F/S Description Condition: Used Item Description Thank you for looking at this item. This is an ONKYO Integra A-819XX (working). (Released in 1986) 135,000 yen Aiming for a digital reference, this product has a real-phase amplifier configuration and a simplified circuit structure. The Integra A-820 series is a pre-main amplifier with a real phase amplifier configuration and a simplified circuit structure, etc., to ensure high purity transmission and improved reproduction capability. The Integra A-820 series is finished, and the 819 series is the final XX model that has undergone a model change. The specifications are so extravagant that it could be considered the successor to the A-820 series. Vintage amplifiers need to be warmed up for a few minutes to reach their full potential. I think vintage amps show their full potential by warming up for a few minutes. (This is my subjective opinion, so please refer to it for your reference.) Outside appearance, There are some minor scratches and some repairs on the side panel. (Subjective) Please check the photos. Please check the photos. As for the sound, we have not measured it with a measuring instrument. I have not measured the sound with a measuring instrument, but there is no problem and the records and CDs sound good. The sound is not measured with a measuring instrument, but there is no problem, and records and CDs are sounding good. There is no rattling sound after the maintenance. For the purpose of sound quality improvement, The contacts of the switches between the input and output sections have been disassembled and cleaned. The contacts of the switches between the input and output sections have been disassembled and cleaned. ?We have checked the sound output for more than 3 days (5 hours a day). Please read to the end and bid only if you are satisfied with the item. Please refrain from bidding if you are looking for a like-new item or if you are nervous. Maintenance Contents. * Cleaning of input, rec selector, switches, volume, and disassembly *Cleaning of speaker relay contacts *Clean inside and outside *BIAS, DC_0V, check and adjustment Check items * phono MC,MM normal * cd,tuner,aux,tape1,2 normal * tone, balance, each switch normal * REC selector normal * no rattling sound in any part (There is a possibility of buzzing in places that have not been operated for a long period of time.) *(We have not checked the video monitor output.) Notes. Condition of the item, note 1. *There are some minor scratches. *There are some repairs on the side panel. *This is a vintage amp, so there is a risk of malfunction. *No accessories Other If there is no sound, please check the following *In the case of an amp Check that the input selector is set to the correct input. Is the sound coming out through the headphones? Is the speaker AB switch set to OFF? Connect the terminals that are connected to the amplifier to another terminal. Change the connection cable. Change the connection cable. If the amplifier does not have a CD input terminal, connect to TUNER or AUX. *In the case of a CD player If there is a LD lock for transportation, release it (remove it). Is sound coming out of the headphones? Connect the terminal that is currently connected to another terminal. Change the connection cable. Change the connection cable. If the amplifier does not have a CD input terminal, connect to TUNER or AUX. Thank you for reading to the end. Now, please take care. Explanation Aiming for a digital reference, a real-phase amplifier configuration and simplification of the circuit structure were thoroughly implemented for high purity transmission, This is a pre-main amplifier with improved reproduction capability. Basically, it has the same configuration as the A-817XX, but with enhanced output. Dynamic distortion occurs when the linearity of the power stage temporarily deteriorates when the signal level changes inside the amplifier, To prevent acoustic distortion, which occurs when the amplifier vibrates due to sound pressure from the speakers, The new real-phase amplifier configuration uses a newly developed W-stabilizer system. In the new real-phase amplifier, the DD (Dynamic Distortion) stabilizer circuit solves the generation of dynamic distortion, Acoustic distortion is solved by a new structure called the X-stabilizer. The DD stabilizer circuit detects dynamic distortion at the power stage, This distortion component is subtracted from the signal in the driver stage to cancel it out. The X-stabilizer was developed based on the idea of attaching a sturdy platform to the chassis of the amplifier itself, The X-Stabilizer reduces chassis vibration by using an X-shaped structure made of a highly rigid special PbSb alloy. In-phase transformers, etc., are added to the input terminals and power supply section, which are the input paths for external disturbance signals. Real phase amplifier configuration is adopted. S.I.T (Signal Interface Transformer) is installed in the input terminal and P.I.T (Power Interface Transformer) is installed in the power supply section to guard the amplifier circuit. The amplifier circuit is guarded by a signal interface transformer (I.T.) and a power interface transformer (P.I.T.) in the power supply section to prevent the intrusion of external noise and realize high purity transmission. In addition, a charge noise filter is added to the power supply to eliminate normal mode noise entering from the AC line. The power-in-phase transformer inserted in the power supply circuit not only eliminates common-mode noise, but also eliminates phase shift of the charging current of the power supply, It also eliminates phase shift of the charging current of the power supply and transmits correct phase information. The power in-phase transformer produces a constant peak charging current by combining the opposite phase charging currents on the + and /- sides, This improves the drive capability of the speaker and the braking capability of the low-frequency range. To achieve high purity transmission, the Tape Monitor switch contact is eliminated and a Rec Selector system is used, The Direct Tone method uses a center tap on the volume control to remove the Tone amplifier from the signal path, The Muting switch is removed from the signal path and placed in the Direct Tone circuit. A CD Direct switch is provided, and when this switch is pressed, the signal is sent directly to the dedicated quad volume without passing through any contact points. This enables high purity transmission. In order to cope with the low impedance of the speaker, a strong power supply with plenty of margin and parallel-connected power transistors are used, This enables stable drive even when the load temporarily changes to a low impedance such as 2 ohms. In addition to the Treble and Bass tone controls, a Contrabass control boosts the frequency range below about 100Hz. This allows boosting of only the low frequencies without affecting the mid-range, such as vocals. In addition, a new type of circuitry is used that provides up to 20 dB of boost when muting is turned on, Using Contrabass with muting on late at night, for example, allows for rich bass reproduction even at low volume. The Tape1rec, Tape2rec, and Video Mode have off positions, When not recording, the recording system is separated from the signal system to ensure high purity transmission. Type Stereo pre-main amplifier Rated output(20Hz to 20kHz, CD to sp out, both channels driven) 150W+150W(6ohm) 130W+130W(8ohm) Dynamic Power 430W+430W(2?) 305W+305W(4 ohms) 190W+190W(8ohm) Total harmonic distortion (20Hz to 20kHz) CD to sp out: 0.004% (at rated output, 8 ohms) phono MM to rec out: 0.003% (at 3V output) phono MC to rec out: 0.015% (at 3V output) Modulation distortion (20Hz to 20kHz) CD to sp out:0.004%(at rated output) Power bandwidth 5Hz to 100kHz(IHF-3dB, THD 0.2%, 8ohm) Damping Factor 100(1kHz, 8ohm) Frequency Response phono?rec out(RIAA deviation):20Hz to 20kHz ±0.2dB CD to sp out: 2Hz to 100kHz +0 -3dB Input sensitivity/impedance phono MM:2.5mV/47k? phono MC: 180?V/220? CD Direct, tuner, tape play: 150mV/47k? video, VCR play(audio):150mV/47k? video, VCR play(video):1Vp-p/75? Phono maximum allowable input (1kHz/10kHz, 0.005%) phono MM:210mV/1000mV phono MC:15mV/75mV Rated output voltage/impedance tape rec1, 2: 150mV/560? VCR rec(audio):150mV/560? pre out:1V/600ohm VCR rec, video mon out(video):1Vp-p/75? S/N ratio(IHF-A filter input short) phono MM:88dB phono MC:70dB CD, tuner, tape play:100dB video, VCR play(audio):100dB Tone control(Vol -16dB) bass:±10dB treble:±8dB contrabass(when muting off/on):+10dB/+20dB Muting(volume center and below) -15dB Power supply AC100V, 50Hz/60Hz Power consumption (Electrical Appliance and Material Control Law standard) 230W AC outlet switched: 1 system, 100W Unswitched: 2 systems, total 100W Dimensions 471mm (width) x 173mm (height) x 396mm (depth) Weight 22.5kg Shipping We will carefully deliver using the packingmaterial. ?Standard?Free shipping FedEx or DHL or JP : with tracking number ?Customs duties may apply. Customs duty will be borne by the buyer. If you are looking for other products, please contact me.I will make a sincere effort to be of service to you.Thank you very much for visiting my listing page. My intention is serving you with sincere manner. Returns Free returns International Buyers - Please Note: * Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyers responsibility. * Please check with your countrys customs office to determine what these additional costs will be prior to bidding/buying. * These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges. * We do not mark merchandise values below value or mark items as gifts - US and International government regulations prohibit such behavior.
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