Please advise me on how to fix this:
My setup is:
Pioneer VSX-1015TX receiver
CS2 Center Channel
Monitor 60s up front
Monitor 30s in the back
Velodyne DPS 12 for sub.
Everything sounds GREAT, but when listening to music in Dolby Pro Logic IIx (or Dolby Pro Logic IIx Music) the rear channel develops this bad echo. In dolby digital mode I haven't detected the noise yet, but I'm going to check that tonight. You can only hear it if you're really close to the speaker. It sounds kind of warbled and it's only on the lows and mids. The highs sound great.
I've tried other modes like Neo, THX, etc and can't get it to go away. In regular stereo mode, only the monitor 60s and sub are working.
I'd like to get all 5 speakers playing, but without the weird sounds out of the rear speakers.
I think one of these may be the possible culprits, please advise:
1. Receiver/Dolby Pro Logic IIx is distorting the sound for some sort of effect. You really can't hear it unless you're right next to the speaker. From distance it's not noticable.
2. Speaker distance settings are about 8 feet higher than the other speakers.
3. Potential short in speaker wire cables. My speaker wires are running under the carpet pad, and my main couch is fairly heavy. It's possible the couch is somewhat shorting the wires. I think this is a long shot though because the wires are under the pad, the wires are 14 guage, and are high quality, and the highs sound great. If it was a short, I'd think the highs would be the first ones to suck.
4. The speaker wire doesn't have a positive, negative side, so it's possible the phase is off, but I tried it in both positions, and based on my ear tests, I'm fairly certain they're both in the right phase.
What do you guys think?