Sansui QRX 5500 (1973–1974)

A four-channel solid-state receiver from the early quadraphonic era, produced by Sansui between 1973 and 1974.

Overview

The Sansui QRX-5500 is a four-channel receiver built during the height of the quadraphonic audio movement. Manufactured by Sansui and released from 1973 to 1974, it combines a solid-state AM/FM stereo tuner with a 4-channel amplifier designed to deliver immersive sound. Though documentation is sparse, surviving units confirm its role as a high-end receiver of its time, with original pricing set at $599.95.

Specifications

Product type	Four Channel Receiver
Production years	1973–1974
Original price	$599.95
Power output	22W/ch into 8Ω (quadraphonic)
Frequency response	30Hz to 30kHz
Total harmonic distortion	0.3%
Damping factor	40 at 8 Ohm
Tuning range	AM/FM
Power consumption	400 W max.
Dimensions	594 x 203 x 370 mm (WxHxD)
Weight

Design

The QRX-5500 features a solid-state AM/FM stereo tuner paired with a 4-channel amplifier, built to support quadraphonic playback through discrete four-channel audio output.

Market

Listings show a wide range in current market value, with one pre-owned unit offered at $14.95 and another valued at €2,183.00. One owner reported paying $60 for a working unit with minor cosmetic damage, rated at 8/10 condition. Service manuals are available, supporting restoration and maintenance.