By now you have noticed that the predominant opinion is the big processor and lots of extra amplifiers and wires will give you an incredible amount of control over the system. Will this improve the SQ... maybe/ probably. It is an added level of complexity that some are and some are not prepared for. If you do your homework it is great if you dont ... heck if you do your homework a non active system can be quite satisfying too.

The advanced Pioneer, Clarion, or Eclipse HU will give you a good % of the control of the Alpine 700 series or the Audio Control for a fraction of the price. Continue with your search, if you think you can do this without getting trapped in a spiders web of RCA's and speaker wire then it can be an incredible step forward.

Also Zapco (among others) is putting processor's in their amps so an active setup can be a little simpler too.

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MECA SQ

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I don't know what your problem is, but I'll bet it's hard to pronounce.