Adding a 2nd center channel?

Really? Are you sure they are duplicates and not synthesized?

Kal

GOOGLE DTS WEB SITE,THAY SHOW TWO CENTER CHANNEL OR TWO LEFT FRONT AND TWO RIGHT FRONT SPEAKERS.THAY SHOW DIFERENT SPEAKERS ARANGEMENTS FOR HT.

I see no reason for this except for novelty. Has anyone any reason to believe that any recordings are mixed/mastered for dipole/bipole center speakers?

Interesting idea Nsgarch. This is a variant of a center channel I own from Unity Audio (now Cerious Technologies) that has a rear firing tweeter. All the drivers are angled up on both front and rear, so play with that as well by tilting each speaker.

I don't recommend 2 center channels.

I totally agree with everything Kr4 said. However, if you just feel like screwing around (to see what happens ;--) you might try placing the two center channel speakers back to back; i.e., one pointed AWAY from the room, and with its speaker cable connection reversed (so that it's 180 deg. out-of-phase with the one pointed TOWARD the room.

It would especially easy to try in your case, because you could use one pair of the bi-wire cable to hook up (normally not bi-wired) to the front facing speaker and the other pair to hook up (reversed) to the rear-facing speaker. You'll be hooking up the speakers up in parallel, so just make sure each speaker has at least a 4ohm (or greater) impedance and that your amp can handle a 2ohm load ;--)

If you decide to try it, please report back. Thanks.

Neil
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1. It is generally a mistake to use multiple speakers for the same channel as acoustical interaction between them corrupts spatial distribution and imaging.

2. Use one of whichever speaker is better and better-matched to your L/R speakers.

3. If you chose to use 2, stop bi-wiring. It is useless anyway.

Kal