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Pioneer SA-9800

Integrated Stereo Amplifier (1976-81)

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Pioneer SA-9800


The Pioneer SA-9800 has the impressive feature which is the NSA (non switching amplifier), created specially by Pioneer.

This is a type of amplifier that adopts the merits of both class A and class B amplifiers, and it excels in keeping down the heat loss and allows the transistors to operate all the time in the active region.

For this reason, a high output power with a very low distortion factor is yielded all the way up to the high frequencies.


Power output: 100 watts per channel into 8Ω (stereo)

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.005%

Damping factor: 55

Input sensitivity: 0.1mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 72dB (MC), 90dB (MM), 110dB (line)

Output: 150mV (line), 1V (Pre out)

Semiconductors: 3 x IC, 6 x FET, 73 x transistors, 36 x diodes

Dimensions: 453 x 155 x 425mm

Weight: 18.4kg

Year: 1980


Related Catalogues

Hi-Fi Stereo

Stereo Components

Amplifiers and Tuners

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Reviewed Jun 30th, 2018 by ziadsat

nice amp and it needed

Reviewed Feb 02nd, 2018 by rsectora

Way ahead of its time, a true classic not super loud amp but when you do crank it.. you get at any level sound so warm so smooth so realistic... clean inputs, matched to the tuner eq and ctf1250 its just the super nice classic PIONEER SILVER series that if you like music you have to have...

Reviewed Sep 13th, 2017 by Adamhifi

SA-9800 is the best Pioneer stereo integrated amplifiers ever made.



Need a selector switch re: SA-9800

I need function selector switch for my pioneer integrated amplifier sa 9800.
can somebody help me where to search and buy it.

re: SA-9800

I have an opportunity to purchase either a Pioneer SX-3900 receiver or Pioneer A 9800 integrated amplifier. Aside from power output (120 watt RMS vs 100 watt RMS) can anyone tell me which has better preamp section (phone SN ratio, frequency response) and at least in theory, which will sound better sonically?

They will be used with a pair of HPM 100 speakers, a CT-F 9191 tape deck and old Pioneer tuner from around 1978 if I go with the A 9800..

re: SA-9800

They're both fine examples of Pioneer's swan song from mass market pre-eminence. (They came back a few years later with the Elite series.....I'm a Pioneer loyalist, but I lived through the Champagne era and later. There are good reasons why that gear doesn't inspire a lot of "auction site" passion.)

The xx50 and xx80 series were the peak. I've owned a 7800, a 9800 and I currently own/restored a 3900. I LOVE the Fluoroscan Blue Displays and the sound is nice. (This was the beginnings of the distortion spec wars, which didn't have the virtues that the power wars had in spades. Below about 1%, a design's virtues/distortion figures become suspect/ephemeral.) The 7800 and 9800 and 3900 ALL had VERY serious heat/aging issues. The connectors on the output stages cook themselves over time. You need to replace/repair them. I do not push the 3900 I have as hard as any of my xx80's. (That's most of them.....except the 680, which was my first and don't really miss very much.) I gave my 580 to my sister and I have restored samples of each of the rest either in storage or use.) I'm not a big fan of recapping as a preventive measure (at least at this point in history for this gear) BUT I recommend it for the x800 series amplifiers. IF you're going to own one, you're just putting a stop loss on very near future catastrophic failure issues. While eventually that becomes an increasing likelihood with all gear, so far, my well taken care of/restored samples of the late '70's/VERY early '80's gear are still holding up. Especially if they're used regularly. Make sure (if you don't do it yourself) that you ask for them to replace the output stage wiring harnesses. Just one person's opinion. (But based on personal experience....) Good luck.....

re: SA-9800

I'm looking for a function control switch and a speaker control knob ..

jairmaz's picture

re: SA-9800

Many thanks for yours help from Colombia

Pioneer SA-9800

thnks !!!!

from argentina !


plz send me a sa 9800 circuit diagram



Pioneer SA9800


I am classic Audio Gear collector. I bought Pioneer SA9800 in faulty condition found one channel completely gone bad on power amp side. I hope to fix it with the help of Service manual on hifi engine. Don't know if required spares/components will be available!

Thank you,

pioneer 9800

do you still have it if you didnt fix it im looking for the light meters mine quit will you sale me one if you have one or do you know someone who does thaks dave

Pioneer SA 9800 replacement potentiometer

Does anyone know where I can get the volume control for the sa 9800 amp, part number acw 119? Alternatively of a supplier that will do a replacement dual ganged pot? I believe that there is an extra 'tap' for the loudness circuit????


volume control for sa9800


re: volume control for sa9800

This appears to be a common problem with this unit.
I have a customer who has two of these units with the same issue.
In looking on the audio repair forums and vintage parts suppliers, I see many requests for this part.
If you could please, let me know if you can source this part. I would like to find something as close to OEM as I can.

Thank you,
Steven M.

re: volume control for sa9800

I'm still looking for these Alps 4-pin audio taper pots.

re: volume control for sa9800

Consider removing the control and disassembling the housing. With the help of 100% deoxit and a bit of added tension on the wiper, these pots can be saved.

This website is not affiliated with or sponsored by Pioneer. To purchase SA-9800 spares or accessories, please contact the company via their website or visit an authorised retailer.