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SC 50W '94 amplifier LM3876

N

Noah

Jan 1, 1970
0
Hello

I have two problems with the SC 50W amps.

When the amp has no signal input, the speakers are extremely quiet. When
I connect the signal, the speakers have a hiss/hum. It isn't
extremely loud, but it's too loud. As I turn up the volume, the noise
lets louder. How can I fix this? All the wiring is tidy and shielded and
kept away from voltage wiring.

The second problem which has got me confused is it won't accept the line
out from my soundcard! I get no music at all. Also when connecting a
preamp, I can only run the signal in direct mode, and also I can only
run the signal from the CDROMs headphone jack when not using the preamp
in direct mode . Any ideas on how to fix this? It doesn't seem to like
preamps. Btw, I have a 10K log pot on my amp.

Thanks.
 
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