1 MA speakers... check out the Platinum line... just saw some inkling about them in the Stereophile CES 07 show report... online now.
2 Ground loop issues. Esiest way to remove the ground loop is to remove the ground. Usually lifting the ground at the service pole (where ALL Sat & cable grounds wind up) is easiest. Not the safest... but the easiest. Check out the threads here on Ground loop issues.
Conditioning devices as a rule do not address it. Cables, gear, etc... don't either.
finding the origin of the problem, if it's not the CATV or SAT, is simple. Just start unplugging. What I did was just turn off everything BUT the power to the audio system at the breaker box then just turn one on and listen... another person will make this effort easier. taking a few minutes in between engaging breakers is good too. When the sibalence returns, Violin! You'll know what circuit it's on. Just see what is plugged in on that line. I'd bet it's either PC, telephone gear, a battery charger for a cell phone, or a Sat/CATV receiver. If it's still present with all the breakers off but the stereo... go outside and lift the ground. Sometimes you'll have to give it a few minutes to clear out completely... but it'll be better right off.
there are transformers that go inline onto the cable itself and are cheap which do work... if i can remeber the name I'll post the link... it'smade by Dayton and can be had from parts express.. $10 each. Worked for me... or you can lift the ground from your gear using the little cheater plugs which prevent the ground on the power cord from making contact in the receptacle. Lots of ways to address this problem.
Los of things introduce junk into the houses power. PCs, modems, wall wart (transformers, like on PC accessories, speakers, scanners etc.).
I lifted the ground on my cable then had some issues later on...with it reloading info and such. I got a fiber optic system entirely. Phone, web, & TV. Verizon FIOS. they added a battery back up... that was the first thing I disconnected. they are big trouble in a good stereo system. I know. I had a uninterupted power supply once before. Never again... well, unless it's full wave.
oh, and I got rid of all my Monster wires except some M1000 ICs which I use on a TV. I can't give them away. But mine are like six or seven years old. they are probably better these days most likely.
Good luck
2 Ground loop issues. Esiest way to remove the ground loop is to remove the ground. Usually lifting the ground at the service pole (where ALL Sat & cable grounds wind up) is easiest. Not the safest... but the easiest. Check out the threads here on Ground loop issues.
Conditioning devices as a rule do not address it. Cables, gear, etc... don't either.
finding the origin of the problem, if it's not the CATV or SAT, is simple. Just start unplugging. What I did was just turn off everything BUT the power to the audio system at the breaker box then just turn one on and listen... another person will make this effort easier. taking a few minutes in between engaging breakers is good too. When the sibalence returns, Violin! You'll know what circuit it's on. Just see what is plugged in on that line. I'd bet it's either PC, telephone gear, a battery charger for a cell phone, or a Sat/CATV receiver. If it's still present with all the breakers off but the stereo... go outside and lift the ground. Sometimes you'll have to give it a few minutes to clear out completely... but it'll be better right off.
there are transformers that go inline onto the cable itself and are cheap which do work... if i can remeber the name I'll post the link... it'smade by Dayton and can be had from parts express.. $10 each. Worked for me... or you can lift the ground from your gear using the little cheater plugs which prevent the ground on the power cord from making contact in the receptacle. Lots of ways to address this problem.
Los of things introduce junk into the houses power. PCs, modems, wall wart (transformers, like on PC accessories, speakers, scanners etc.).
I lifted the ground on my cable then had some issues later on...with it reloading info and such. I got a fiber optic system entirely. Phone, web, & TV. Verizon FIOS. they added a battery back up... that was the first thing I disconnected. they are big trouble in a good stereo system. I know. I had a uninterupted power supply once before. Never again... well, unless it's full wave.
oh, and I got rid of all my Monster wires except some M1000 ICs which I use on a TV. I can't give them away. But mine are like six or seven years old. they are probably better these days most likely.
Good luck