The RQ-3748 is the top of the line model for the RQ-3700 series of receivers and is a true monster when bridged at 125 watts. It was succeeded by the RQ-4748 in 1975.
The accessory CD-4 demodulator for this series is the DQ-3700.
Stereo Bridge Mode
Dimable tuner lights (High/Low)
Independent balance controls for each channel
Selectable Image Orientation
4 Channel modes supported internally include Discrete, SQ Matrix, and SQ Blend
Supports two sets of four speakers while in 4 Channel mode or two sets of two speakers while in Stereo Bridge mode
Two 4 Channel Discrete Tape Monitors
Two Switchable Phono Inputs
4 Channel Discrete Aux input for external CD-4 decoder or other sources