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Old 19th May 2016, 04:00 PM   #1
diyAudio Member
Join Date: May 2016
Default Newbie: Required Amps for TDA7293

First Amp build. I have a TDA7293 mono board with 50V 2200uf caps.
It requires dual power Double AC 12-32V.

I am searching Ebay for the correct transformer.
I find multiple toroidal transformers at +32-0- -32. The price varies based upon amps.
Looking at this transformer rated at 0.8A

:::As 0532 50VA 32V Transformer | eBay

*** What minimum amps does this TDA7293 board require.???

Last edited by FFury; 19th May 2016 at 04:04 PM.
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Old 19th May 2016, 04:46 PM   #2
Join Date: May 2014
im not an expert , not even close, but i'll try to help.

to power an tda7293 amp u will need an 100va (at least) transformer for each channel. so, for a stereo amp u will need at least 200va transformer to properly power that amp.
And for the secondary voltage u need 2X25volts maximum, 2X20- 2X22v would be perfect.
I dont know where u are, if u are in US, i would buy from or if u like ebay, then antekinc on ebay is johnango and sells AS-2222 . thats what i think u need.

Last edited by gabe75; 19th May 2016 at 05:01 PM. Reason: add some
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Old 19th May 2016, 07:19 PM   #3
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fabrice63's Avatar
Join Date: May 2015
Location: Fréjus
Hi, have a look there , you'll find all the infos you are looking at :

TDA7294 + Power Transistors AMP (TDA7293 to come also)

TDA7293 single, bridge, parallel

for me nothing less than 300va trafo ( R core is the best ) , supply caps 8200 uf 63 v / rail , 100 uf 63 v bootstrap cap , i run some of these nice chips , they sound pretty good if properly implemented ;-)


Last edited by fabrice63; 19th May 2016 at 07:29 PM.
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