Then suddenly yesterday I went to the garage to do more work, powered up my system, and noticed my right channel ALS ribbon was NOT playing anywhere near it's normal volume level. It IS working, but at a MUCH reduced volume level. There is NO distortion or static coming from the ribbon. Just sweet, sweet---albeit at a MUCH reduced volume---music. Here is what I know:
1. It's not the preamp. I swapped outputs and the right speaker still exibited the same problems on the (now) left channel. Right channel worked great (on left speaker).
2. It's not the power amps. I swapped speaker wires on the amps, and again, it was only the right speaker with the problem.
3. It's not the speaker wire. I am running really fat wires that are in good condition, and I re-wired and doublechecked the connections, correct channel hook-up, etc.
4. The subs (all 4) appear to be in good working order. They sound to be at the proper volume compared to the left speaker.
5. I checked over the right speaker's crossover very carefully (but I'm no electrician). Nothing appears to be burned or out of the ordinary. No smells. Played with wires, solder joints, etc, and nothing hints as a cause.
6. The fuse looked fine. I replaced it anyway. No change.
7. The volume of the right ribbon DOES follow the volume level selected at the preamp, so when you "crank it", the right channel ribbon volume does go up...but it's like its only getting 10% of the energy from the power amp that its supposed to get.
8. I gently tightened the 3 screws at the top and bottom of the ribbons. No change.
9. As soon as my wife gets up, we're gonna see if we can't find a crack in the ribbon wire (advice from Dave S). Stayed tuned...
Any way to tell if my crossover is bad versus my ribbon if I find no crack?