The SX-7730 is the European Version of the SX-737. Sections of the front panel are black instead of silver, and the dial and meters are a somewhat lighter shade of blue. Otherwise, they are identical models. Rated at 35 watts RMS per channel into 8 ohms.
The SX-737 is a high-quality Stereo Receiver featuring 35 Watts per channel RMS at 8 ohms from 20 Hertz to 20,000 Hertz with no more than 0.5% Total Harmonic Distortion.
It has the power to do the job - not too much and not too little.
Pioneer's medium-powered SX-737 Stereo Receiver doesn't waste watts, yet it gives you the latest state-of-the-art advantages for versatility and true high fidelity performance.
The FM front end is equipped with a frequency-linear 4-gang variable capacitor and dual-gate MOSFET.
Specifications
Tuning range: FM, MW
Power output: 35 watts per channel into 8Ω (stereo)
Frequency response: 15Hz to 40kHz
Total harmonic distortion: 0.5%
Damping factor: 40
Input sensitivity: 2.5mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
Signal to noise ratio: 65dB (mic), 70dB (MM), 95dB (line)
Output: 150mV (line), 30mV (DIN)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 1 x FET, 3 x IC, 46 x transistors, 22 x diodes
Dimensions: 500 x 158 x 410mm
Weight: 13.2kg
Accessories: FM T-type antenna
Year: 1974
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Source
Hi-Fi Engine