It would be helpful if you could give us an idea of the amplifiers you are thinking of.
Also, if you have a cable TV feed, make sure that the cable feed isn't limiting your systems potential by introducing a DC voltage on your AC/system ground.
Can you list the rest of your system?
Also, if you have a cable TV feed, make sure that the cable feed isn't limiting your systems potential by introducing a DC voltage on your AC/system ground.
Can you list the rest of your system?