Sibilance how do I get rid of it?

that guy has absolutely NO idea what he's talking about---
but certainly we ALL know that by now

Bob B., please explain exactly where you disagree with Natalie's statements. Natalie may be blunt, but I don't see where anything he's said above warrants such an outright dismissal.

Dedicated circuits for cleaner power are a farce, in my opinion. Here is why I think so.
My living room light comes on with the timer tonight. The light bulb blows instantaneously while I'm listening to the stereo and my speakers go "phlam!" Not pop, even bigger than that.
My setup is a dedicated circuit on the opposite side of the circuit breaker box than the living room circuit. Furthermore I have a Tripp-Lite Isotel surge protector. The bulb blowing was probably too low to trip the Isotel.
Obviously all the circuits in the house are interconnected so I think this "dedicated circuit" is a farce. If somone can explain otherwise I am open to that.
The only reason I can se for dedicated circuits is so you don't get a voltage drop when the A/C, etc. comes on.

Cdc, simply calling something a farce does not make it so.

The lights in any given room in my home dim for a moment whenever the air conditioner comes on. Even though the AirC is on it's own seperate circuit from the lights. AirC compressors/fans require substantial current. As does my 18amp tablesaw motor which is also known to dim lights.

I don't know much about electrical, but I believe each of the two phases/legs in your service panel has a copper bus in which all circuit leads are connected to. All the circuits on one leg are out of phase from the opposing leg. The opposing phases/legs are completely seperated thus far. But you still have half of your circuits sharing one phase. But in addition it is likely that your neutral bus is shared by both phases/legs and perhaps some to most or all of your ground.

The point being that there's an awful lot of sharing going on in the service panel even for so-called dedicated circuits.

The dedicated circuit is primarily for two reasons:
1. to maximize current draw for an amplifier as some amps require every bit of power it can get, not to mention an amplifier's anything but constant current draw from taking constant current away from your other compoents. For example: Some time ago, I took my pre/pro off the dedicated 20amp line where my 600 wpc@4ohm amplifier is hooked up. The pre only draws 36 watts of power. No big deal right? Putting the pre on it's own dedicated line caused the dynamic headroom of my amp to just blossom. And this was noticeable at fairly low volumes.

2. To minimize grunge and noise that other appliances, dimmers, blenders, microwaves, and digital sources inject into other runs off the same circuit spreading to your audio equipment which if there is any to be found and there always is will be amplified to some degree.

In summary, a dedicated circuit is not a complete isolator from whatever other junk may be running in the house. But it's as close as most can reasonably get. The only complete isolating strategy would be to have all audio equipment running from a second service panel which itself is connected to the transformer at utility pole outside your home.

-IMO

Natalie, Perhaps the best response I could provide would be to paraphrase Scot Markwell of The Absolute Sound after they dramatically altered the wiring, circuit breakers, etc. in room 3 at Sea Cliff about a year ago. Scot said something like: "Until now we have never been able to fully evaluate or review a product based on it's true potential. A statement both humbling and frightful."

And if you do the work yourself, your looking at a couple of hundred dollars to install dedicated lines, audio grede outlets, and circuit breakers.

Pretty cheap tweaks, don't you think? If only line conditioners and powercords would be so cheap.

-IME