SONY TA F808ES


Hello there,

I have a Sony Ta 808es amp which my dad gave to me, I recently checked transistors of amp which located at the bottom. There are 8 main transistors, 4 of the are SONY brand (with S logo), the other 4 are Toshiba brand ( with T logo). Amp plays perfectly good, no buzzing or any distortion or any defects in sound. Should I really concern about the transistors, do they really effect any how. Cause one of my friend just insists it effects, and that bothers me..

Thank You
Niko
36e27866 6471 4d62 afa4 9ae8d65bf73cnikodavidoff
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I would ask your father if it has been serviced ? If the 4 Sony and 4 Toshiba transistors are on separate channels, doing the same thing within the circuit, I would assume it has been serviced, and the Sony transistors were no longer available to the servicer. Sony transistors and Toshiba transistors might measure the same, but many feel ( as I ), that they can sound different, given everything else is identical. If it is 2 Sony and 2 Toshiba per each channel, this might be either or, as Liz indicated.
Thank you very much ! Then I really don't care what they say actually.. I set up the system looks fine, thank you again guys
Cheers
Niko
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@nikodavidoff

TA-F808ES uses both S & T type mosfets, so i believe the unit is still in factory state. Do not change unless you have the confirmation that amp was serviced and mosfets were changed. If in doubt check following site:  https://audio-heritage.jp/SONY-ESPRIT/amp/ta-f555esj.html
In Japan it was sold under F555ES name.