MW/FM Four Channel Receiver (1973-76)
The QX-646 is equipped with all present quadrophonic systems, CD-4, SQ and regular matrix.
It features extra wide linear FM dial scale and an extra large signal strength meter for easy, precise tuning.
Other features include program source illumination, headphone terminal and 3 pairs of speaker terminals.
Tuning range: FM, MW
Power output: 11W/ch (stereo), 10W/ch into 8Ω (quadraphonic)
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 1%
Damping factor: 40
Input sensitivity: 2.5mV (MM), 180mV (DIN), 180mV (line)
Signal to noise ratio: 70dB (MM), 90dB (DIN), 90dB (line)
Output: 180mV (line), 30mV (DIN)
Speaker load impedance: 4Ω to 16Ω
Semiconductors: 9 x FET, 5 x IC, 109 x transistors, 45 x diodes
Dimensions: 525 x 149 x 360mm
Accessories: FM T-type antenna, PQX-1011 CD-4 test record
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