hmm i never used a capacitor.. never needed too.

 

okay so the amps light is on and i got the to work but the subs are not bumping nor moving and the bass is very very low...i dunno what the problem could be

 

could be wired the wrong way or improper wiring. i noticed when i switched my 10"s to a different box they werent either. the wiring is a huge factor because if you dont get it right then you will get very low bass and the sub wont move properly. make sure you check that as well from the subwoofer itself to the wiring inside the box to the connectors. it will be the issue im sure of it

 

With the stereo system in these Mazda's, you hardly need amps and subwoofers. Subwoofers = stupid and inattentive drivers = Accidents. IMHO.