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TEAC A-420

Stereo Cassette Deck with Dolby System

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TEAC A-420


The TEAC A-420 is a front loading cassette deck with independent rotary transport controls.

It incorporates an advanced motor and drive system, built in Dolby noise reduction system, peak level meters, mixing capability, microphone recording function, timer control and selectable (3 position) bias and eq.


Type: 2-head, single compact cassette deck

Track System: 4-track, 2-channel stereo

Tape Speed: 4.8 cm/s

Heads: 1 x record/playback, 1 x erase

Motor: DC servo

Tape Type: type I, FeCr, CrO2

Noise Reduction: B

Frequency Response: 30Hz to 16kHz  (Cr02 tape)

Signal to Noise Ratio: 60dB  (dolby B)

Wow and Flutter: 0.07%

Total Harmonic Distortion: 2.5%

Input: 60mV (line), 0.25mV (mic)

Output: 0.775V (line)

Dimensions: 440 x 285 x 155mm

Weight: 8kg


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Reviewed May 26th, 2016 by Julian Perry.

Managed to buy a very nice one that had been serviced and restored.
A really nice sounding deck that records and plays very well considering it's forty years old. Never really been a fan of dolby nr, but this deck has surprisingly changed my mind on it.
I've managed to get recordings sounding very close to the original source.
If you have the opportunity to pick one up in good condition don't hesitate.

Reviewed Jan 10th, 2016 by jimkono

This is a very nice deck. It has a really nice build quality, and records well, producing tapes that, to my ear, are hardly if at all, distinguishable from the vinyl originals.

it seems to be an orphan unit along with it's sister A-400, perhaps this is because of the unusual, (for cassette decks), rotary controls; for me that was the attraction; they work well but are independent of one another, so a bit more work is required to put the unit through it's paces.

I really am pleased with this unit and would recommend picking one up if it crosses your path.

Internals are dependent on 3 belts, readily available, and relatively easy to replace, provided you can get the insanely tight, tiny screws loose hold the flywheel thrust bearing in place.

Forget about the official procedure for replacement, (requiring almost complete disassembly of the machine front), and look at dropping the circut board directly in front of the bottom screw, through the hole the PCB is mounted above; this gives access to the bottom screw.

Having most of my experience with later vintage cassette decks that had 2 equalization settings, I am still a bit stymied by the 3 position EQ switch on this deck. i have been unable to find a user manual for it anywhere to help me understand this feature.

Should anyone have a USER manual I would greatly appreciate a scan of it or the opportunity to purchase it if it is something surplus to your needs

Reviewed Nov 29th, 2015 by yashoda rohana

Good recording and good sound quality with 3 bias and 3 Eq selections



This website is not affiliated with or sponsored by TEAC. To purchase A-420 spares or accessories, please contact the company via their website or visit an authorised retailer.