Teac A-660: The Audiophile’s Open-Reel Workhorse

Name: Teac A-660
Brand: Teac

In the golden age of analog audio during the 1970s, few brands earned the respect of serious audiophiles and home recording enthusiasts quite like TEAC. Among its revered lineup of open-reel tape recorders, the Teac A-660 stands out as a benchmark of performance, build quality, and sonic fidelity. Released in 1975, the A-660 was positioned as a high-end consumer/pro-sumer reel-to-reel deck, offering studio-grade features in a compact, user-friendly package. While not as widely known today as some of its siblings like the A-3340 or the legendary A-3300, the A-660 remains a cherished machine among analog purists and tape restoration specialists.

Technical Specifications

The Teac A-660 was engineered with precision and reliability in mind, featuring a dual-capstan transport system, quartz-locked speed control, and a fully discrete amplifier circuit. It supported both 7.5 and 15 inches per second (ips) tape speeds, with optional 3.75 ips via an external switch, making it versatile for both high-fidelity playback and extended recording sessions.

Specification	Detail
Model	Teac A-660
Year Introduced	1975
Format	1/4" Open-Reel (2-track, 1/2-track)
Tape Speeds	7.5 ips, 15 ips (3.75 ips optional)
Tracks	2-track stereo / 4-track mono (switchable)
Heads	Separate record, playback, erase heads
Motor System	Dual capstan, direct drive (quartz-locked)
Frequency Response	30Hz – 20kHz @ 15 ips (±3dB)
Signal-to-Noise Ratio	>60 dB (Dolby B/C compatible)
Wow and Flutter	<0.08% (WRMS, 15 ips, quartz-locked)
Input/Output	Line In/Out (RCA), Mic In (RCA), Headphone Out (1/4")
Equalization	120µs / 70µs (switchable)
Power Requirement	120V AC, 60Hz (North American model)
Dimensions	17" W × 6" H × 13" D
Weight	28 lbs (12.7 kg)
Included Features	Dolby B/C noise reduction, level meters, pitch control (±6%)

Sound Characteristics and Performance

The Teac A-660 is celebrated for its transparent, detailed, and dynamically rich sound—hallmarks of TEAC’s commitment to high-fidelity engineering. With its separate playback and record heads, the A-660 delivers excellent channel separation and minimal crosstalk, ensuring a wide, stable stereo image. The frequency response is remarkably flat across the audible spectrum, especially at 15 ips, where the deck reveals its true audiophile credentials.

When recording on high-quality tape stock like Ampex 456 or Quantegy GP9, the A-660 captures music with a lifelike presence and warmth that digital formats often struggle to replicate. Its discrete analog circuitry avoids the harshness sometimes associated with early solid-state designs, instead offering a smooth, natural tonality that complements both acoustic and electric sources.

The inclusion of Dolby B and C noise reduction (switchable) allows for cleaner recordings with reduced tape hiss, though purists often prefer to record and play back without noise reduction to preserve the full harmonic character of the tape. The front-panel VU meters are both functional and aesthetically pleasing, providing accurate level monitoring with a satisfying mechanical response.

Notable Features and Innovations

What set the A-660 apart from many of its contemporaries was its quartz-locked direct-drive capstan system, a feature typically found on professional studio decks. This ensured exceptional speed stability, minimizing wow and flutter to near-inaudible levels. Unlike belt-driven systems that could stretch or slip over time, the A-660’s direct-drive mechanism offered long-term reliability and precise tape control.

Additional standout features include:

Switchable track configuration: Users could toggle between 2-track stereo and 4-track mono modes, increasing flexibility for archival or creative applications.
Dual playback head option: Some variants allowed for a second playback head to facilitate real-time monitoring during recording—a rare feature in consumer decks.
Precision tape guides and tensioning: TEAC’s attention to mechanical detail ensured consistent tape-to-head contact and reduced print-through.
Pitch control (±6%): Useful for tuning recordings or matching tape speed to other sources.
Solid walnut cabinet: Not only beautiful but also acoustically inert, reducing cabinet resonance that could affect performance.

Common Issues and Maintenance

Like all vintage tape decks, the Teac A-660 requires regular maintenance to perform at its best. The most common issues stem from age-related wear and neglect:

Deteriorated rubber parts: The capstan tires and pinch rollers can harden or crack over time, leading to speed instability or tape slippage. These should be replaced with modern equivalents.
Dirty or oxidized heads: Playback and record heads should be cleaned regularly with isopropyl alcohol and demagnetized every few months to maintain clarity and reduce noise.
Sticky mode switches or potentiometers: Internal switches and level controls can become noisy due to oxidation. Contact cleaner can help, but disassembly may be required for a full restoration.
Capacitor aging: The power supply and audio circuits use electrolytic capacitors that may dry out over decades. A recap by a qualified technician is recommended for long-term reliability.

Despite these potential issues, the A-660 is known for its robust construction. Many units still function beautifully today when properly serviced, a testament to TEAC’s build quality.

Current Market Value and Collectibility

The Teac A-660 is not as commonly encountered on the vintage market as some of TEAC’s more famous models, but it is steadily gaining recognition among analog enthusiasts. Well-maintained units in good cosmetic and working condition typically sell for $400–$700, depending on accessories, original packaging, and included features like Dolby C or the dual playback head.

Units with full service history, replaced rubber parts, and calibrated heads command a premium, especially among home archivists and musicians seeking a reliable analog recorder. While not yet a “blue-chip” collectible like the A-3340, the A-660’s combination of performance, build quality, and understated elegance suggests its value may continue to rise.

Conclusion and Legacy

The Teac A-660 represents the best of 1970s Japanese audio engineering: meticulous craftsmanship, thoughtful design, and a relentless pursuit of high fidelity. Though overshadowed at the time by flashier models, it has earned a quiet reputation among those who value precision, reliability, and musicality.

Today, the A-660 appeals to a niche but passionate audience—audiophiles who appreciate the tactile experience of threading tape, musicians exploring analog warmth, and archivists preserving analog media. In an age of digital convenience, the A-660 reminds us of the beauty and depth that only real tape can deliver.

If you’re lucky enough to find a well-cared-for A-660, treat it right, service it properly, and you’ll have a lifetime companion for experiencing music as it was meant to be heard—analog, alive, and utterly immersive.