I am setting up surround sound in my parents' new house. The builder pre-wired the room for 5.1, so I'm just adding the components. They're using a now very hard to find Panasonic SA-XR55 with AudioSource minispeakers (small budget for audio). The room was not pre-wired for rear surrounds, so those jacks are currently not in use (maybe added later, when I feel like crawling through 2 feet of cellulose in the attic ). After hooking everything up, I discovered that the front left speaker has very poor volume, even when the receiver is jacked to overload. And by poor I mean POOR--a conversation at normal volume drowns it out. The other speakers sound fine--REALLY LOUD at that setting. The receiver is also driving JBL in-ceiling 'B' speakers in the living room and bedroom, and those sound fine, too. Any idea what could cause the diminished volume? I tried swapping the speaker with the front right, but the volume did not improve, so I know it's not the speaker. As far as I can tell, the XR55 will not let me adjust the volume for the fronts, only the center, surrounds, and rear surrounds if they're in use. While typing this post, it's occurred to me that the +/- wires could be reversed in the wall, either behind the speaker or behind the receiver. Could that cause such dramatic signal loss? I also just realized that I should try another speaker output on the receiver, just to make sure it's not the receiver (oh no!). So, now that I've answered my own question, any thoughts?