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Sansui QRX-9001

4-Channel AM/FM receiver (1978-79)

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Sansui QRX-9001


The Sansui QRX-9001 is multi-functional, having a similar spec to the 9090DB plus a low noise 4-channel facility for 4-channel broadcasts and recordings..

4-channel reproduction is possible in QS, SQ and CD-4 configurations along with 4-Channel synthesizing from conventional 2-Channel stereo sources.

The incorporated Dolby noise reduction and direct-reading power meters further enhance flexibility.


Tuning range: FM, MW

Power output: 120W/ch (stereo), 60W/ch into 8Ω (quadraphonic)

Frequency response: 20Hz to 30kHz

Total harmonic distortion: 0.3%

Damping factor: 30

Input sensitivity: 2.5mV (MM), 100mV (DIN), 100mV (line)

Signal to noise ratio: 70dB (MM), 80dB (DIN), 80dB (line)

Channel separation: 45dB (MM), 45dB (line)

Output: 100mV (line), 30mV (DIN)

Speaker load impedance: 4Ω to 8Ω

Dimensions: 600 x 174 x 415mm

Weight: 23kg


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Reviewed Dec 03rd, 2019 by

This is a unit for serious collectors because you will need to spend serious money to bring it back to spec. Sansui was famous for using fusible resistors and they will need to be replaced the Dolby switch is problematic and always needs attention. A lot of vintage stereos you can clean the controls run some current through it and it can be functional and sound great this unit is not one of them quad boards blending resistors so much going on it needs to be a full restore QRX restore is world famous and people send their units all around the world to this shop for full restoration and when they get done with it they say you will have too spend 25000.00 in today’s money to beat the sound of a fully restored Sansui QRX 9001 I sat on mine for five years before taking it to them on a long road trip. It’s amazing to see how many units they restore all around the world never seen so many European models. It just shows how great these Sansui’s are and how the rest of the world loves them also. A true classic receiver

Reviewed Jul 12th, 2019 by

The original surround sound, a truly immersive and holographic experience. The capstone of my vintage audio odyssey.

I have listened to the QS 100, QS 800, and ORX 5001 prior to finally spending the big bucks to land the 9001. You must do the work mentioned in the forums to get this unit to work properly. This means fixing the boards with cold solders, re-pinning boards, replacing resistors and identifying and replacing caps that are not up to spec and ensuring the Holy Grail alignment is done for amazing separation. You do not have to replace all the caps! But expect to spend $300 to $500 for that work. If you want a machine that works better than when it came from the factory this repair and modification work is essential, and you need to find the right tech!

Do not buy a unit with any sings of corrosion, and a well maintained case will tell you a lot about the condition of the unit. Wait until you see a really nice shiny, perfect condition unit.

Once the repair and modification work is done it takes a little while for everything to settle in, but once it does you will have mind altering sound!

Reviewed Jun 04th, 2018 by

I have one so I use it as power amp to my denon 3313. For live concerts I prefer QS Hall 2 channel to 4 channel processor than Dolby pro logic 2 music.

Reviewed Jan 23rd, 2017 by

I just got my hands on a QRX-9001 after a 30 year wait! I'm running a pair of Tannoy Mercury M20's and B&W 602's. That power and THUD :) I'm listening to all of my music again and I really can pick out sounds I've never heard before.
10 out of 10, thoroughly impressed.

Reviewed Jul 06th, 2016 by


Reviewed May 19th, 2016 by

The QRX-9001 gets a 10 if working absolutely perfect. Which is rare nowadays especially in original condition. Mine used to and the powerful quad sound was nothing short of awe! I use a 4 channel 8track player that's serviced and restored, sounds better than compact discs.
When competing against my G-7700, the battle was close. But the 9001 seemed to have more detail and separation. At high volume, the G won, but it's also 40wpc more if more.
Note: both have not been driven past 40 on the volume dial because it's just to f'ing loud.
The 9001 has quad ability no other quad receiver has because of the new chips/ matrix of QS only used in this model. Meanwhile the era of quad went down as the 9001 hit the market and no other brands were producing quadraphonic gear. So Sansui made the supposedly last quad and the best and the most powerful. Granted it's not as flashy looking as a 4400, the 9001 will crush any and all quads in sound performance.
But they have a tendency to have issues once they reach vintage maturity, 30 years later.
Quadraphonic is the real surround sound.

Reviewed Dec 05th, 2015 by

it very power receiver,



mctr74's picture

re: QRX-9001

I just got my hands on a QRX-9001 after a 30 year wait! I'm running a pair of Tannoy Mercury M20's and B&W 602's. That power and THUD :) I'm listening to all of my music again and I really can pick out sounds I've never heard before.
11 out of 10 thoroughly impressed.

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