TEAC A-350 (1972)

At 5.3kg and clad in wood panels, this compact deck was Japan's first stereo cassette machine with Dolby noise reduction.

Overview

The TEAC A-350 is a 2-head, single compact cassette deck from the early 1970s. It was introduced in 1972, though some sources cite production around 1973. It was the first stereo cassette deck in Japan with Dolby noise reduction. It works best with chrome tapes. The original price was ¥58,800, though one source suggests approximately 51,800 yen. That put it in the upper tier of home audio gear, aimed at serious enthusiasts who cared about signal clarity and build quality. It measures 430mm wide, 110mm high and 250mm deep, and weighs 5.3kg. The sides are wood-clad. It runs on 100 VAC at either 50Hz or 60Hz and draws 15W.

The A-350 is designed for C-60 and C-90 tapes. It holds a steady 4.8cm/s tape speed with a hysteresis synchronous outer rotor motor, a type chosen for its stability and efficiency in cassette decks. Wow and flutter are rated at 0.13%, a solid figure for its era. The track system is the standard 4-track, 2-channel stereo layout, so you get full stereo recording and playback on both sides of the tape. Winding time is up to 90 seconds for a C-60 tape. That is not fast by later standards, but it was competitive then.

Key Features

First Japanese Cassette Deck with Dolby Noise Reduction

The Dolby system is the main feature of the A-350, and it is switchable on and off. It reduces tape hiss and transistor noise, especially with chrome tapes. According to available documentation, the Dolby circuit improves the signal-to-noise ratio by more than 15 dB. That pushes the S/N ratio to 58 dB with Dolby engaged, up from 50 dB without. Studio-Sound (April 1974, p.34) noted in period context that noise reduction systems like Dolby were becoming essential for high-fidelity mobile and home recording setups.

HD Ferrite Head and Tape Selector

The A-350 uses a high-density (HD) ferrite head, which gives better magnetic efficiency and durability than earlier head materials. It supports better high-frequency response, particularly with chrome tapes, and a dedicated tape selector switch handles the chrome setting. Frequency response runs 30 Hz to 16 kHz with chrome tape and 30 Hz to 13 kHz with standard high-fidelity tape. Those figures reflect the limits of early cassette formulations, but they were impressive for consumer gear in 1972. Microphone and line inputs are separate. Each path is routed independently to prevent crosstalk and keep the signal clean. This reportedly improves the S/N ratio further by avoiding shared circuitry.

Expanded Scale VU Meter and LED Peak Indicator

The A-350 has an expanded scale VU meter for more precise level monitoring while recording. That matters on the narrow tape width of a cassette, where distortion comes quickly. An LED peak level indicator warns of clipping before it happens. A slide volume control allows independent left and right channel adjustment, which gives granular control over input levels and was a rarity in decks at this price point. The 3-digit index counter helps with cueing, though it lacks frame accuracy, which is typical for non-professional machines of the era.

Independent Inputs and Output Options

Line input sensitivity is rated at 0.1V into 50kΩ. The microphone input accepts 0.25mV at -72dB into impedances from 600Ω to 10kΩ, which suits dynamic and low-output mics. Line output is specified at 0.3V into 10kΩ or higher, enough to drive most preamps of the time. The headphone output supports 8Ω loads. A DIN connector terminal suggests compatibility with other DIN-equipped components, possibly within TEAC's own ecosystem. A tape running indicator lamp confirms operation.

Collectibility & Value

The TEAC A-350 has a quiet following among cassette enthusiasts and vintage audio collectors, particularly those focused on early Dolby-equipped machines. Current listings show a range of conditions and prices. One unit on Reverb is described as "Very good" condition, serviced with new belts, and an Etsy listing offers a tested Japanese-market unit for $116.10. HifiShark reports the A-350 appearing across more than 400 secondhand hi-fi sites, with a median price reference for 2026 based on six trusted listings, though no exact figure is provided. Belt replacement appears to be a common maintenance task, going by the Reverb listing's note of "New Belts Serviced," so long-term ownership will likely mean periodic attention to the transport mechanism. An optional acrylic cover, the TZ-135, was sold separately for ¥2,000, and dust covers remain a recommended accessory for preservation.