Welcome to the forum, and happy holidays!
I'll give your questions a try:
1) I have an old Techniques Recvr SA-GX470 and wanted to purchase a B&W CC6 center channel but the wire connections don't seem to be compatible with my old reciever.
Would you help us out and let us know what the connections are on the receiver and on the speaker? I'll look around, but it's sometimes difficult to find connection info on older receivers.
2) For those who have experienced the CC6 center channel personally, how would you compare it to a larger driver such as a Klipsch c-3 which have 6.5 inch drivers. Do those smaller CC6 drivers have a realistic tone when it comes to movie dialogues and concerts?
Sorry, I haven't heard it, so I can't help here.
3) What do you advanced audiophytes feel about using different brand speakers (center channel, front speakers, subwoofer) when it comes to creating a system. Or do you feel it necessary to keep the same line. Do you actually lose quality or just personal preference?
The most important speakers to match are the fronts and the center, and this is not just matching brand - you'd want to get speakers that the manufacturer recommends for timbre matching. This is because you want the sound qualities to be very similar as sound moves from right to center to left. For example, if a motorcycle in a movie or show moves from right to left across the screen, you don't want it to sound like a Harley in the right speaker, a moped in the center speaker, and then a Harley again in the left speaker. The rear speakers aren't as important to match to the front three, and there is no reason to match the brand of the subwoofer to the brand of the other speakers.
