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.

Awesome PIONEER QX-9900 Quadraphonic / Vintage Stereo Receiver - Pro Serviced!

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End Date: Tuesday Nov-19-2019 19:04:54 PST
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Pioneer QX-9900 Quad Receiver Parting Out Multi Voltage Power Transformer

$49.95
End Date: Wednesday Dec-11-2019 11:21:27 PST
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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 Dec-17-2019 11:56:26 PST
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Pioneer QX-9900 Quad Receiver Parting Out Switches +Board

$34.95
End Date: Saturday Dec-14-2019 19:06:17 PST
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