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this is a mono block amplifier ,both positives are the same inside the amp and both negatives are the same ,there is 4 terminals to make it easier to wire 2 speakers . Use either positive and either negative ,with this speaker ,inside the box you can wire both positives together and negatives together (parrallel) this should be 3 ohms and the amp should run smoothly ,maybe a little warm but that amp can take it .
Is this sub an svc or a dvc? From what I looked up they are svc, so each sub's voicecoil is 3 OHMS, connecting them in parallel would lower them to 1.5, and your amp is capable of going down to 1.5 ohms. So I would suggest running them in parallel.
Speakers wired in parallel Recommended Amplifier: Stable at 2 or 1 ohm mono
(Although from the information I gathered these subs have 3 OHM voicecoils, so in the diagram where is says 4 OHM it should say 3 OHM, and the 2 OHM should say 1.5 OHMS.
try one at a time. if they work then try hooking them up differently. if none work, then check to see that your amp is not in protect mode. if amp is ok, then check to make sure you have your rcas connected to your amp. in other words, re-check all your wiring. if still nothing, try your amp on your friends car and vise versa.
your subwoofer is wired incorrectly to your amplifier. Figure out which ohm load of subs you have and then what ohm load options your amp is stable at. Next go to either the Crutchfield website. find their learning center. go to subwoofer wiring diagrams. or go to www.the12volt.com and find their section on it
Your amp based on what you say would have no problems whatsoever with
an 8 ohm load, not even if it actually has dual 4 ohm coils and you
wire them in parallel giving a 2 ohm load (don't know your particular sub).
Every
good car amp has protection circuits to prevent itself or the speakers from
damage from too low loads so it shouldn't be a problem even if you
screw up with your calculations. A good amp should even be capable of dealing with a dead short on a channel, zero ohms, activating protection of course.
sounds like they have your sub amp in mono but they put the speakers in series which totally cancels the benefit of running your amp in mono. you will probably be happier if you just hook the left speaker to left plus and minus and the right to right plus and minus. Cuz even though subs aren't directional they do pass some higher frequencies that are and that dilutes the stereo effect.
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