Thanks everyone for the responses. I will try turning the kitchen lights off tonight and see if that makes a difference. |
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Oooh, dimmers can definitely make trouble.
I recall other threads on this subject.
Since this occurred after the kitchen upgrade, I have a sneaking suspicion that the electrical work has something to do with the sudden change in your stereo.
Perhaps Almarg will chime in....
B |
I don’t know what the capacitance per unit length of OCOS speaker cable is, but given that your cable is fairly long and given also that OCOS is a somewhat unconventional design a possibility that occurs to me is that its capacitance might be causing an ultrasonic oscillation in your amplifier. And perhaps the condition is sufficiently marginal that minor aging effects or perhaps even a change in AC line voltage have put it over the edge.
If so, the volume dependency you mentioned might result from the speakers being stressed to a greater degree when an oscillation and a high volume audio signal are both present.
So I would suggest trying different speaker cables, whenever that may become practicable.
Good luck. Regards,
-- Al
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They all are on a dimmer. |
Also if the LED lights in the kitchen are on a dimmer switch that's a big culprit of AC line noise.
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LED bulbs is likely
turn them off and see if that fixes things - if not, post exactly what type they are (built in or replacement screw in type) |
There are a lot of reasons why systems sound shrill. Especially as the volume is turned past moderate levels. But one reason that is not even on audiophiles’ radar is the dreaded Morphic fields. You know, the things behind Morphic Message Foils, the clever clock, and why telephone books are bad for the sound. After addressing all the usual suspects the distortion is still there! 😧 You see, folks, things are worse than anyone suspect. Much worse. Let the hand-wringing and denials begin.
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Teo_Audio: All of the kitchen lights were changed to LED bulbs so maybe that is it. Would turning the light switches off take them out of the loop or do I need to shut the breaker off. There is also the Refrig ice maker and the electric ovens but they are rarely on when I am listening. Heated floors were installed but they are off in the summer. That's all that was changed.
If the P5 won't tackle this problem what if any alternatives are there, besides having the kitchen rewired which is not an alternative? |
If it's not the system, the room or environmental factors, then all that's left is you. What's different about you since this has occurred? Change in medications, different diet, exposure to loud noises, etc.?
But before worrying about that, I would disconnect and reconnect every system interconnect/cable.
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Consider putting noise filters on all the new equipment and lines in the new kitchen.
As well, the person who did the electrical system for the kitchen, may have altered your room’s connectivity to get the kitchen on line.
Consult with them.
those are probably the major potential culprits.
I’m guessing one of the new pieces of equipment in the given kitchen has a very dirty ’pulse power supply’ and is injecting noise into the AC which is impacting your sound space, electrically.
This can be quickly tested via shutting down the new kitchen at the AC power panel, then adding kitchen breakers back in, one by one, listening the whole while. If this is the case, the culprit outlet and associated kitchen gear will show itself. Lighting is also on this list. Especially CCFL’s and LED bulbs.
Best cheap tweak ever for audio shows:
BRING INCANDESCENT BULBS to the show and put them in the bulb sockets of the room, and turn them on.
the filaments of incandescent bulbs will knock down (partially absorb) the noise peaks of the dirty ac power on the given lines in the given hotel room.
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Anything is possible but both would have to been damaged the same way and I don't play the music that loud. And, as I don't have any equivalent quality speakers to substitute I have no idea how to test this. |
Not sure it would be room acoustics as there is no improvement as I walk around the room. The amp is plugged in directly to the wall and thus it is possible that ac noise is the cause but the issue is so pronounced and the P5 (only front end components plugged in) indicates a pretty decent sine wave and voltage that I tend to think not.
I would hate to think it is related to the Pass Amp as at 88 pounds it would not be fun to send back to dealer.
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Did you damage your speakers? Playing too loud or clipping? |
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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Sudden and on both channels. And does not change when I move around the room. |
Was this a sudden change, or a gradual change?
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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.
On both channels? |
The only thing that was changed in my house is that we put a new kitchen in. As the system is in the basement and I use the P5 except for the amp I cannot figure how that would have made a difference but stranger things have happened.
In regard to aging equipment all the electronics are less than 4 years old. Only old items are the speaker cables/interconnects/power cables. |
Aging equipment (a cap has degraded) or a loose connection. |
Have you changed anything in your room? Added a coffee table, moved speakers, etc? Have you changed where you sit? |
Thanks for the advice. I assume the ac cables do not degrade themselves. |
Yes, the humidity shift happens at about 45%.
Above that it is dissipative. static will bleed off.
Below that, it will begin to build. The effect is subtle but persistent, and worsens as the dryer it becomes.
It's not just the carrier as an issue it's the static.
The next possibility is a degrading of electrical connections, with regard to impedance at the interface, due to oxidation, contact quality degradation, etc.
Next, that some critical component or aspect is right on the ragged edge of being overly revealing and overly analytical. As combinations go, that is.
Anything with outboard power supplies and an umbilical connection to said power supply is especially vulnerable to contact degradation in the connecting umbilical. Check those connections. Reinsert, tighten, etc.
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Yes but this issue started in the Summer and now it is Fall so change in humidity did not have any effect. |
Do you live in an area where the changes in season affect relative humidity? |
