TEAC TD-321

The TEAC TD-321 is a semi-professional, tube-based reel-to-reel tape transport and recording unit from around 1969, notable for its robust construction and sound quality comparable to Ampex 300 series transports.

• Tape Format and Tracks: Uses 1/4-inch tape in a 2-channel, 1/2-track stereo configuration.

• Heads: Equipped with 3 heads (erase, record, playback) made of Permalloy, arranged in a stacked/inline configuration for efficient tape contact and signal quality.

• Tape Speeds: Supports multiple speeds including 3¾ ips (9.5 cm/s), 7½ ips (19 cm/s), and higher speeds such as 7¾ and 15 ips, allowing flexibility for different recording and playback needs.

• Reel Size: Compatible with reels up to 7 inches in diameter.

• Motors: Features three motors for capstan and reel drive, providing stable and reliable tape transport.

• Electronics: Uses tube (valve) electronics for preamplification and recording circuits, contributing to its warm sound character.

• Equalization: Employs NAB equalization standard typical of professional and semi-professional tape decks of the era.

• Outputs: Balanced XLR outputs for professional connectivity.

• Voltage: Designed for 100V AC operation in Japan, with some units adapted for other voltages.

• Build and Reliability: Constructed with high-quality components, the TD-321 is known for solid mechanical reliability and sound quality, though it is relatively rare and was produced in limited numbers.