The center channel is a seperate channel. It can be turned off.
The x-overs are at the speakers, so in the doors and back side panels.

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Taz... My favorite BMW so far.
Sport, Cold weather, Logic 7

19" Miro M6 Wheels w/competition stems
MGP Claiper Covers (BMW)
Dension Gateway 500 and Audio Video Router
AC Schnitzer pedals
Carbon Fiber Di-Noc Trim
5W White Angel Eyes
Polk tweeters