Hissing sound when Tone Control is turned on


Hello all,

Wonder if any one of you experienced the same issue with your Mcintosh preamp ? If you did and what was the solution to it?
I have noticed that apparently audible hissing sound can be heard from my speakers during idle while the "tone control" is enabled on my Mcintosh C49 preamp. As soon as i toggled the tone contol switch off from the front panel the hissing sound is completely gone and the background is dead silent like it supposed to. 

Is this considered normal ? Any advises will be appreciated.

Thanks

Larry

larrymanadgn

Showing 1 response by jerkface

Well, there is certainly a purpose for a tone control.  Unless your listening room is an anechoic chamber and your system is perfectly tuned to deliver 144dB SNR and perfectly balanced signal from 20Hz-24kHz, you're going to find situations where you need/want to correct for something.