Disconnect the preamp. Connect the TV audio left & right outputs to the amp inputs. Use the remote to control the sound volume. If this results in adequate volume then your amp is ok. The preamp is now suspect!
Did I buy a broken amp?
I purchased a used amp to mate with a dac / preamp in the same line which I own. The new amp is suppose to be 150 watts into 8ohm. When I play the amp at 35/100 volume, I barely hear any sound. I need to get volume to at least 75/100 or 80/100 to provide adequate listening sound. 75/100 sounds how 50/100 should sound. (And so on) It does not seem to clip or distort. Could the amp be broken or does it just not provide enough juice for my speakers?
Equipment:
Preamplifier / Dac Wadia 321
amplifier:wadia 315
Apple TV source
speakers: Kef 201/2
Equipment:
Preamplifier / Dac Wadia 321
amplifier:wadia 315
Apple TV source
speakers: Kef 201/2