Re: 6 Speakers - 4 Channel Amp - Need some guidance
I believe you can wire the two front speakers together to get a final resistance of 8ohm, but it may be 2 ohm, and hook that to the front channels.
If it were me, I would hook the 3.5s to the head unit, and then wire the 5.25s and 6x9s to the front and rear channels, respectively.
EDIT: Another option would be to wire the 3.5s to the front channels and 5.25s to the rear and either not install the 6x9s or hook those to the head unit.
Vehicle: 2009 Pontiac G5
Head Unit: Pioneer AVH-X3700BHS
Highs: Image Dynamics XS28
Mids: 6-1/2" Poly Cone Midbass Woofer 4 Ohm
Subwoofer: Image Dynamics IDQ12d4v4
Amplifier: Kenwood XR 900-5
Battery: Kinetik HC800BLU