Low noise 1W amp

[Fonz]

Hi All.
Can anyone out there help me with a low noise 1W amplifier chip/circuit. I
am currently using an LM386, and a TDA70?? (sorry I haven't got it with me),
with less than ideal reults. The hiss is driving me nuts, as I'm using
headphones and I high gain setting (between 20 & 200).
Many thanks in advance
Rob
Melbourne.

 

[bruce varley]

Fonz <r@removeme.com.au> wrote in message
news:43e039b1$1@dnews.tpgi.com.au...

Hi All.
Can anyone out there help me with a low noise 1W amplifier chip/circuit.
I
am currently using an LM386, and a TDA70?? (sorry I haven't got it with
me),
with less than ideal reults. The hiss is driving me nuts, as I'm using
headphones and I high gain setting (between 20 & 200).
Many thanks in advance
Rob
Melbourne.

This might be a case of too much gain in later stages and too little up

front. Assuming that your first amp has a fixed noise output, then the lower
your subsequent stage gain, the lower your output noise. If you knock the
gain of the final amp down as far as you can and bump it up on the preamp,
you should see an improvement. For me in the past, that approach has made
the difference between intolerable and excellent.