[fmorelli]

Those are good questions. First of all I just know it is a basic violation to send the left side signal to a right-side speaker. Only A/B testing of two configurations would tell us how much of a difference it makes, and I honestly have no guess. Bavsound's suggestion is not a bad one (low frequencies are non-directional), but really kills that speaker pair's contribution ... not to mention it is a mid-bass woofer, not a subwoofer. And if one had a factory speaker in the footwell, I don't even know if its performance specs would lend to the Bavsound suggestion (though they would know).

Sorry I don't have any clear answers. With the car apart for speaker installation, this is not a lot of work - that is, to run the wire as I did.

Filippo