The Sony TC-399 was introduced in 1978 as a compact open reel tape recorder, aimed at providing a straightforward yet effective recording experience. Constructed with a large MDF box and a metal front plate, it utilized a single chunky AC motor for operation. The TC-399 featured three Ferrite & Ferrite heads, allowing for 'off-tape' monitoring, a significant advantage over the cassette format of the time. However, it was limited to playing seven-inch reels at a maximum speed of 7.5 ips, which limited its playing time in comparison to larger reels. The machine was designed with basic transport functionalities, controlled by a single rotary control, and included two record keys for versatile mono recordings. It offered three bias and EQ settings, enabling compatibility with Sony's Ferrichrome tapes. The unit was equipped with VU meters, although these had slow ballistics causing potential under-reading of levels. Despite its simplicity, the TC-399 delivered surprisingly fine sound quality with a pleasant treble and strong bass, provided it was operating properly. It remained a reliable machine, but many units were found to be out of calibration or in poor condition due to age. Notably, the Ferrite heads were durable, but electronics such as capacitors and joints could deteriorate over time. Prices for the TC-399 varied significantly based on condition, and prospective buyers were advised to thoroughly test units to ensure they met performance expectations.
