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Tweater hiss

I have B & W 802 Nautalis speakers, Bryston 4B ST amp, and BP-25 preamp. I hear a hiss coming from my tweater when no music is playing. I assume it is occuring during the playing as well. I just had the amp serviced by Bryston and was wondering if anyone had any ideas on what is going on?

bryanhod
kr4's avatar
kr4
3,424 posts
 
How much hiss is there? Can you hear it when you are more than a foot from the tweeter? If not, it's probably OK. Otherwise, see what Bryston says.
bryanhod OP
211 posts
 
I listend again last night and the hiss can be heard about one foot away but not more than that. The volume increase is minimal when the volume is increased on the preamp. My guess is it coming from the amp. I will put on the power conditioner and see if that helps. Thanks for the information and help.
bryanhod OP
211 posts
 
I installed the Audio Magic power conditioner and this reduced the hiss. Also greatly improved the sonic clearity of the music. I will wait to hear from Bryston on the amount of hiss that is normal. Thanks for your help.
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