HI,

I run a Yamaha DSP-a1 for my home theater but I also use a Denon POA 8200 to power my Paradigm Studio Reference 100's. Recently I noticed a distinct SHHHHH sound eminating from the tweeters, which I either didn't notice before, or it i something new.

I use an AR surge protector which is supposed to give clean power to audio equipment but I am not sure if it does anything other than protect from power surges.

I think the noise is there regardless of input source but honestly, I only noticed it recently and haven't had a chance to verify this. I had it on CD input when I noticed the sound.

Is this a problem or is this just a normal sound when you have 200 watts being fed to your speakers? Is this a grounding issue?

The sound is only noticable when you right up close to the speaker but I thought I would enquire and make sure this is something I should not be concerned with.

Thanks for the help.

Yam