Check all wiring including inside the sub box (remote, ground, 12v, positive, negative,). Is the sub wired in passive or active. Check if the sub has duel voice coils and if it's wire the correct way. How big is the amp and how much power can the sub handle?


The way it tend to do my set up is.

1. turn the gain all the way down until no sound from the sub.
2. turn on what ever music it is that you listen to.
3. set your bass to 0.
4. crank up the volume until your door/deck speakers start to distort then cut it back a bit.
5. go to your amp and put it on what ever filter you want i.e. high/low pass.
6. adjust gain until your sub distorts or until you think its enough for your listening pleasure if it distorts cut it back a bit.
7. turn your volume down to normal listening volume and then adjust your bass,mid,treb and what ever else you need to adjust.
8. turn your head unit off. if your sub starts vibrating while your head unit is off adjust gain down until it stops vibrating.