Yes, use a distributed audio system that permits source compensation. The better matrix audio systems permit you to adjust the input level for each source in the system. Crestron PAD-8 does this as do some Integra receivers. I am sure a complete list of such products could be compiled.
Alan
"This is a Christian Country,Charlie,founded on Christian values...when you can't put a nativiy scene in front fire house at Christmas time in Nacogdoches Township, something's gone terribly wrong"
