I have a jl audio e1200, and everything's been connected correctly. it says that there's power (as indicated by the green LED) but there's no output. what do i do?

Hello codyr25,

First of all, you need to isolate what is causing the problem. No output (sound from the sub) could be a defect in the 1) Wiring, 2) Head unit, 3) Speaker(s), or 4) The amp itself.

Start to systematically eliminate the possible causes. Connect your subs to a known good system. If they work, it's got to be something else. Check the RCA cables from your head unit to the amp. Check the speaker wiring. Check the amp on-board fuses.

Make sure that you have output from the head unit. With multiple RCA jacks, it's possible to plug your cables into an input rather than an output (in the dark, behind the dash). If you have more than 1 set of preamp outs, try another set.

Hope this helps.