In my Srt-4 :
Pioneer Deh-P7700MP
MonsterCable M1001XLN (4ch and 2ch)
Polk/Momo MMC6500 (front 6.5 Comp.))
Polk/Momo MMC690 (rear 6x9's)
Polk/Momo MM2124 x 2 (12in Sub)
Polk/Momo C400.4 (4ch)
Polk/Momo C500.1 (mono sub amp)
Tsunami 2 farad Cap.
All Wiring is Monster Cable, and all connections and Dist. blocks are Tsunami. Custom built false floor/wall in trunk built by yours truly.

And in my girl's car (01 beetle)
Panasonic CQC-9700U
Monster Cable M1001XLN (2ch)
Polk/Momo MM2084 x 2 (8inch Sub)
Polk/Momo C300.2 (2/1ch amp)
And Factory Monsoon system.
All wiring is Tsunami.
Subs in custom sealed boxes with an amp rack built connecting both sub boxes.