I'm starting to lose confidence in my Rotel RSP 1066. It's in my HT system, and listening to a particular CD I'm familiar with doesn't sound quite right. That CD sounds better in my family room system, but given the speakers and electronics in each room, it shouldn't. Is there a way to directly measure the output from the pre pro across the audio frequency spectrum? I don't want to invest a great deal of money in bench testing equipment, but it seems it should be possible to do this with a calibration disc and meter. Any ideas? Thanks.