Sony TC-650 (1972–1976)

The Sony TC-650 is a three-motor, three-head reel-to-reel tape deck. Sony sold it from 1972 to about 1976. It was pitched as a mid-level home deck, sitting between the entry-level TC-630 and the semi-professional flagship TC-755. Contemporary ads in High Fidelity (September 1970, p.23) and Audio (September 1970, p.79) called it a “super deck” and offered it in two versions - the 650-2 (two-track, aimed at semi-professionals) and the 650-4 (quarter-track, for audiophiles). Both had a plug-in head block assembly for quick format changes.

The deck runs at 3¾ and 7½ ips and takes 10.5-inch reels. It uses ferrite erase, record, and playback heads. Three motors drive the transport, including a hysteresis-synchronous capstan motor. The transport controls are mechanical push-buttons, not solenoid-operated. Frequency response is rated at 30-20,000 Hz at 7½ ips and 30-15,000 Hz at 3¾ ips. Signal-to-noise is 55 dB (weighted), THD is 0.8% at 0 VU, and wow and flutter measures 0.05% at 7½ ips and 0.08% at 3¾ ips. The deck weighs 38.6 lbs and measures 17.5″ × 15.75″ × 8.25″. Inputs are mic and line (two each, RCA). Outputs are line (RCA) and headphone (¼-inch). Dual VU meters and separate channel level controls are standard, along with selectable NAB/IEC equalization and tape/source monitoring.

The TC-650 has no Dolby noise reduction, a common complaint among owners, and its mechanical transport feels dated by later standards. It still built a reputation for sturdy construction and reliable tape handling, and many users praise its warm, natural sound. Common maintenance needs are belt and pinch roller replacement and recapping the power supply and audio path. Fully serviced units trade in the $250 - $500 range (2025 estimates). The service manual is available from HifiEngine, and replacement parts are still sourced from specialty suppliers.