Bill- I'm with Avguy, the volume control is the likely suspect. However, check the Sony to insure that it doesn't start to run real hot. The Sony receivers really aren't intended for low impedance loads and can quick overheat, particularly if located inside an enclosed rack or shelf.
You may find that for distributed sound, multiple channel amps are preferable. Parasound, Sonance, etc... all offer small, two or multiple channel amps that are designed for this type of application.
Good luck.
You may find that for distributed sound, multiple channel amps are preferable. Parasound, Sonance, etc... all offer small, two or multiple channel amps that are designed for this type of application.
Good luck.