Teac MA-7

Very rare power-amp which apparently didn't sell much, whatever the country considered.

Endorsed in Japan by Tannoy (or vice-versa :) with several joint ads and even a true / false copy of a letter from Mr. N.G. Crocker (Managing Director of Tannoy) to Teac Corp., praising the quality of the new Teac separates.

A test I have at hand shows that the measured specs are actually way above the ones specified in the manuals, especially those of the MA-7. But I really don't know who built this rare combo for Teac... Maybe JVC ?

2x 190W (40Hz...20Khz, 8 Ohm), 200Khz of frequency response, two 150VA power transformers (for the JP version), with 4x 18,000µF of caps, DC structure, multiple relay-driven protections, 1µs of rise time and 120V/µs of slew rate.
Excellent response on square waves down to 40Hz.

The MA-7 is meant to be powered through the PA-7 so the actual mains power on switch is at the back and only a confirmation LED is at the front.

DC and cap-coupled inputs are available, in RCA format ; the MA-7 can only handle one pair of loudspeakers - but with banana plugs !
A dedicated Teac rack was available : LX-550 - not pretty but all metal and on casters.


The top image is taken from a joint Tannoy/Teac ad (Stereo Sound #53, winter 1980) ; the black versions come from a german Teac catalog dated october 1981 ; service manuals are © from november 1979.

A real JP MA-7 here.