| cpemma |
I've a need to boost the voltage gain of a pair of TDA1514A chip amps to cope with the very low output from a portable CD player source.
Datasheet says top limit for the chip is 46dB, which I think is a voltage gain of 200; I reckon I need a voltage gain of about 90 (39dB) instead of the 30 it's currently set to with 20k & 680R.
Are there likely to be any undesired effects just increasing the gain? Should I be adding a pre-amp instead?
Quality hi-fi is not of the essence, the system is in a trailer, driving mid-fi outdoor speakers and running from a generator a few feet away ;) |
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| Mr Evil |
Increased gain will give you the following undesirable effects:- Increased noise
- Increased DC offset
- Increased THD
- Reduced bandwidth
- Other things I've forgotten
I doubt you'll have any problems. 39dB is still quite small. |
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