Carver Raven 350 Amps

@ozzy 

I sent an email to Jordan asking about the volume control and he replied that it is on the input stage.  I believe this would mean it impacts both gain and volume.

Erich

erichgs,

Thanks for your reply. I would not describe the hiss as hum, but it is quite noticeable sitting even 15 feet away from the speakers with no music playing.
The Atma-Sphere are pretty much quiet compared to the Carvers.

I just tried reducing the Carver volume knob and it does reduce the hiss but it probably also reduces the overall volume too, hopefully not too much.

ozzy

10db of gain is a fairly large difference and I would think could easily account for hearing the noise coming from the input on the Carvers while not on your other amps.  LIke I mentioned before, if you pull the inputs and no longer hear the noise it is almost certainly not the amp from everything I have read.

On my Carvers I get a small amount of hum even with the input disconnected.  It goes away when I short the inputs and even when there I have to be within ~3 inches of the speaker to hear it.  This is with the amplifier volume knob at full and is the same on both amplifiers.  I also get some power supply hum from the amplifiers themselves but have to be very close to hear that as well.