I added a Pioneer TS-SW2341D 10" shallow sub in a custom box, 4 Infifnity Kapa 2 way speakers and a Kicker 5 chanel amp. I kept the stock head unit but had all 4 door speakers run throught the amp. It is loud, clear and thumps pretty hard. The speaker is only thing you can see in the cargo area....the box is behind the panel where the factory sub would have been. I took the picture with my cell phone...it looks much better in person.