Join Date: Jan 2009
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The general advice on car audio forums is to bin the 6x9s and get a 4 channel amp, some component speakers for the front and a subwoofer.
Run the components and the sub off the amp and leave the rear speakers running off the head unit.
That should give you a decent sounding system.
Currently in Jonlucpicard's garage:
2010 Grand Scenic 1.5 dCi Privilege Tomtom