Here's the problem: The sound on my Sony micro-sattelite speakers (hooked up to a Sony receiver) will drop out sometime. The speaker connections are good. I first noticed this with my center speaker. I ran the tone test that tests all the speakers and found the my sub-woofer and left rear had the same problem. However, while running the tone test, I cranked up the volume and all speakers started to work.I kept the test running for a long time at low to medium volume and had no drop out. Tried again later and I lost my sub-woofer. Is my reciever giving up? Something going on in the reciever with the connections? Please help. Thanks.