Sansui QRX-5500

 

Sansui QRX-5500

 

This Sansui QRX-550 is one of Sansui’s Quadrophonic offerings. It puts out 30 per channel to four channels into 8ohms.  It is part of the early beginnings of surround sound. I believe Sansui had six QRX quad offerings and the QRX-5500 was the middle of the spectrum receiver. It was produced in the early 70’s. There was also a QRX-5500A version that reflected a change in the syntax of the decoding from QS to QA and SQ. It has that classic early Sansui styling that was also found on the 9090DB.

 

Sansui QRX-5500

 

The QRX-5500 had a number of decoding options such as:

– QS Synthesizer

Surround +  Hall

– QS Regular Matrix

Surround +  Hall

– Phase Matrix

– Discrete

– 2-Channel

 

 

Sansui QRX-5500 Inside

 

The Sansui quad receivers are all fairly popular.  They are difficult to find in full working condition but, when they are, they sell for reasonable prices. While the top of the line QRX-9001 sells for over $500.00 the middle of the road QRX-5500 sell for under $200.00.

Listings from eBay

Sansui QBL-100 4 Ch Remote Control For Quadraphonic QRX 5500 Receiver

$524.99
End Date: Monday Apr-6-2020 17:37:27 PDT
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Sansui QRX-5500 QRX-3500 rebuild restoration recap service kit fix repair

$195.00
End Date: Sunday Apr-26-2020 8:22:27 PDT
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Vintage Sansui QRX-3500 QRX-5500 QRX-6500 QRX-7500 front LED lamps bulbs lights

$38.50
End Date: Sunday Apr-12-2020 8:02:02 PDT
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New Relay for Sansui QRX-5500 QRX-7500 QRX-8001 QRX-9001 Receiver

$19.99
End Date: Saturday May-2-2020 12:11:18 PDT
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Pioneer QX-9900

 

Pioneer QX-9900 Faceplate

 

This is one of Pioneer’s four channel offerings – the Pioneer QX-9900. The QX-9900 was manufactured in the mid 70’s and featured both Matrix and SQ decoding. It’s rated at 38 watts per channel into 8 ohms and 50 watts at 4 ohms in to four channels. This unit has the distinctive holes in the top of the case.

 

Pioneer QX-9900 Back Panel

 

It also featured:

  • AM/FM stereo
  • 38×4 into 8 ohms and 50×4 into 4 ohms
  • Two tape in/outs front and rear
  • Two aux inputs front and rear
  • Two phono inputs
  • Loudness on/off front and rear selectors
  • Filters high and low on/off
  • Muting -20db on/off
  • Speakers front + Rear A & B on/off
  • MPX noise filter on/off
  • Headphone outputs front and rear
  • FM muting on/off
  • Modes – 2ch stereo, matrix regular, SQ, discrete
  • Selectors – AM, FM mono, FM auto, phono one + two, aux one + two
  • Meter levels -10db on/off -20db on/off
  • Balance front right/left, rear right/left and front to rear
  • Reverberation – time/min/max and modes for front – rear – mode off – mic
  • Left + right mic inputs
  • Left + right mic mixing control knobs
  • Separate treble and bass controls front/rear
  • Tuning and signal meters
  • 4 power meters for each channel

 

Pioneer QX-9900 Inside

 

While the Pioneer QX-9900 is fairly rare it’s not a hotly desired receiver. Still, in very good working condition they can sell for up to $400.

Listings from eBay

Vintage Pioneer QX-9900 4 Channel Receiver AM/FM Receiver

$250.00
End Date: Friday Apr-17-2020 17:35:24 PDT
Buy It Now for only: $250.00
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Pioneer QX-9900 Quad Receiver Amp Boards+ SInks + Outputs

$75.00
End Date: Saturday Apr-25-2020 5:39:05 PDT
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Pioneer SX-828 SX-727 SX-626 SX-6000 QX-8000 QX-9900 Speaker Plug (NEW 2 PAIR'S!

$47.89
End Date: Tuesday Apr-28-2020 0:53:36 PDT
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4 Plugs Pioneer Speaker Connectors SX-2500 SX-6000 SX-9000 QX-8000 QX-9900

$46.95
End Date: Tuesday Apr-21-2020 20:22:02 PDT
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