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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

Showing 2 responses by erik_squires

erik_squires
16,592 posts
 

Not sure it would be room acoustics as there is no improvement as I walk around the room.

That only works for bass modes. Room acoustics is more than that.

In particular, I’m talking your room’s overall power response. How quickly the top end decays. If it is lingering longer, or reflecting more, it will give the exact issues you describe. So, again, did you move furniture, curtains, etc around? If no, then that’s not likely, but still there is a free experiment you can do.

Throw some blankets or pillows on the floor, especially between and behind the speakers. Experiment. This may not be your issue, but it’s free.




erik_squires
16,592 posts
 
Room acoustics, power conditioning, warm up time.

If you have moved furniture around, removed absorbent materials this can definitely cause this. Another thing, leaving your equipment off for extended periods of time. Also, removal of a good power conditioner.

Lastly, new sources of AC noise in your home.
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