PLZ help TDA2030A gain reduction for Headphone Amp
Oct 31, 2016 at 5:43 AM Thread Starter Post #1 of 1

Barrrrkj

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Hello!
I have a TDA2030A based amplifier that should make a decent headphone amp except that its gain, at about 32 dB, is way too high.

It would be easy to change the gain setting resistor or even put in a switch to change the gain from say 10 to 15 to 20 dB for proper Headphone use. But there is a problem.

The TDA2030A datasheet says the chip needs to run at a gain in excess of 24 dB to maintain stability.

A resistor could be placed in series with the output. But that destroys damping factor and sound quality. That is not an acceptable solution.

Meier Audio uses the TDA2030A in their Corda Brick. It has switchable gain of -1 to +14 dB. So how do they do that with the TDA2030A?

Anybody got a working circuit they will share that gets the TDA2030A down to a stable switchable gain of 10-15-20 dB?

Any Suggestions?
I will be much appreciated!
 

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