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Why does my system now have shrill top end.

The equipment in my system (listed below) has not changed but I now find on both CD and Vinyl a high end shrillness to the sound (treble is very harsh) that has become very annoying, especially at high volume levels. I have no idea why this happened all of a sudden.

Endevour E-3
Pass 30.8
Pass XP 20
Esoteric K01x
Linn LP12 (Ortofon Black cartridge)
Linn Linto Phono Preamp
PS Audio P5 (Amp plugged in directly to wall)
JL Audio F112 v2 sub
OCOS Speaker cable (15 feet)
Pass XLR interconnect (Preamp to Amp)
Harmonic Technology Cable Magic Link (not current version). RCA termination

Any ideas?
proacman
soundsbeyondspecs
132 posts
 
I added two lights with in-line dimmers to a distant 20 amp outlet that also powers my system. With the lamp dimmers on, it significantly raised a multi-amplifiers operating temperature and added a soft grain in the separately powered mids and tweeters. It disappeared when I turned off the dimmers or unplugged the lights.   
proacman OP
33 posts
 
Here is the latest update. I ordered treatment for the side walls and will report back. But wanting to make sure it was not my hearing I visited a nearby audio dealer (Audio Connection) with the same music in hand that sounds so shrill at home. And guess what, it sounds fine in their system. By the way, I listed to the Proac 48r, which I did not like, and the Vandersteen Quatro CT, which I liked so much I may buy them if I can sell my current speakers.
gdnrbob
4,411 posts
 
@proacman ,
 Did Johnny have any idea of what may be the problem? He sure knows his stuff.
And, I hope you come over to the V side.
BTW- why are you Proacman if you own Von Schweikert?
Bob
proacman OP
33 posts
 
I owned the Response 2 and 2.5 for many years. That is where the name comes from. And is sure is easier to spell than VonSchweikertman.
gdnrbob
4,411 posts
 
Heehee...
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