The Pioneer SX-737 is a highly regarded, mid-range vintage stereo receiver manufactured between 1974 and 1976 during the golden era of high-fidelity audio. Pushing 35 watts per channel into 8 ohms, it belongs to Pioneer’s famous “X3X” silver-face generation. It is widely celebrated by audiophiles for its warm, punchy, and well-balanced sound signature, rich midrange, and exceptional build reliability.
Key Specifications
Power Output: 35 watts per channel continuous into 8 ohms.
Total Harmonic Distortion (THD): Less than 0.5%.
Dimensions & Weight: 20″ x 6.5″ x 16.5″; weighs approximately 30 lbs.
Retail Price (Historical): Originally sold for $399.95 in 1975.
Features & Layout
Inputs & Connectivity: Includes a high-quality built-in AM/FM tuner, a dedicated phono stage for turntables, an auxiliary input, and two separate tape monitors with dual-direction dubbing.
Acoustic Adjustments: Features stepped (detented) bass and treble controls for precision tailoring, along with high/low cut filters and a loudness contour switch.
Speaker Support: Drives two independent sets of speakers (A and B) using vintage screw-type terminal connections.
Physical Controls: Utilizes robust toggle switches for power and metal push-buttons. This makes it significantly less prone to the brittle plastic failures or integrated rotational switch failures seen in other lines.
