Pioneer QX-9900 (33W/Ch)
Pioneer QX-9900 (33W/Ch)
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Pioneer QX-9900 (33W/Ch)

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Cleaned all Controls and Switches

Replaced Power Switch

Replaced LEDs

Repaired Faceplate


Four channel finally comes of age with this versatile receiver from Pioneer, an outstanding achievement unusual in both capability and tremendous power output.

Featuring a unique matrix decoding circuit, that reproduces all regular matrix records, as well as a second type of decoding circuitry for the SQ matrixed type of records, the QX-9900 is simply the most complete receiver for four channel now available today.

In addition to it's matrix decoding capability, the QX-9900 may also be used for discrete four-channel reproduction as well as more conventional two-channel reproduction.

It's FM tuner characteristics are equally superb, distinguished by excellent sensitivity, a wide linear FM dial scale, and superb selectivity.

Carefully engineered to typically high Pioneer standards, the QX-9900 will give you many years of faithful musical reproduction.

It moves you into the fascinating sound world of four channel and even a bit beyond.


Tuning range: FM, MW

Power output: 33W/ch (stereo), 28W/ch into 8Ω (quadraphonic)

Frequency response: 10Hz to 20kHz

Total harmonic distortion: 0.5%

Damping factor: 50

Input sensitivity: 3.8mV (mic), 2.9mV (MM), 200mV (DIN), 200mV (line)

Signal to noise ratio: 75dB (MM), 85dB (line)

Output: 200mV (line), 35mV (DIN)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 8 x FET, 4 x IC, 113 x transistors, 62 x diodes

Dimensions: 560 x 170 x 430mm