This is my Seat ibiza. So far i have not modified it at all except for installing a proper sound system.
Equipment:
Amps- Alpine mrd-m1000, MRV-T320, MRV-T420
Source- Alpine cda 9813
Subs- Infinity perfect 12's
Front speakers- Infinity perfect 6.1
Rear speakers- Infinity refernce 6x9's
Ixos 1 frad power cap, RF cables

The m1000 runs the two subs, which are in a box i made out of fibreglass with the amps mounted on top.

The mrv-t420 feeds about 100 watts to the front components, which are in fibreglass enclosures i have just finished.
Read on if you want to see how i made the door enclosures
I would appreciate any comments or criticisms.