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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
toddverrone's avatar
toddverrone
838 posts
 
I second what @jea48 said: check, or have your electrician check, the connections in the panel. Not just on the circuit feeding your system, but every connection: hot, neutral and ground for every breaker. You may even consider reseating all the breakers. (Please stay far away from the lines coming in from outside. If you don’t understand what I’m saying, please hire an electrician or ask lots of questions)
I know that loose connections can add significant noise to the electrical system.

Definitely try the amp swap too. Give us more data points!

Good luck!
stfoth
435 posts
 
Please don't kick any dogs, no matter how frustrating this gets.
kosst_amojan
2,095 posts
 
@almarg 
I'm aware that some cables are designed to be highly reactive. I seriously doubt any cable could cause a sudden onset of an undesirable characteristic. A cable may attenuate the problem, but not cure it. 
If I was suddenly having this problem the first thing I'd look for is DC on the outputs. Next I'd verify rail voltage on the power supply and give a good visual inspection of all the discreet components. I'd do the basics to rule out the amp because that's the most likely culprit. 
ronrags's avatar
ronrags
182 posts
 
@grannyring

+1


These forums are meant to exchange ideas and assist members in the world of audio and not insult those who do not agree with their opinions. These forums are not to be used as their personal message board. That is why there is a private message section. No one wants to hear their bickering and personal agendas that have nothing to do with the original topic. It’s time the moderators enforce the forum guidelines.
jea48
2,944 posts
 
If there is garbage fed to the inputs of the amp there will be garbage on the outputs.
Garbage in  = garbage out.

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