I have a JL 1200A mono amp and has been working fine- today i was cleaning up the wiring mess i had. well i had disconnected the RCA's that go to the amp and had just finish tightining the ground wire... i pluged the rca's back in but accidently placed them into the pre-outs instead of the Ch1. Ch2. - redlight flashed... i tried just correcting the rcas i have a green light... but no bump from the subs... Plz help!
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Re: ??Confused and angry!
Try hooking an mp3 player or some other source into the amp (in place of your car stereo)while the car is running to test it. You may have damaged the output of the radio. If not report the results here.
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It's possible the output stage(s) of the amp are blown. Check all audio wiring connections to the amp, input and output, to make sure nothing is loose or disconnected. Also, try wiring up a different sub to verify it isn't the sub that's bad.
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).
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.
If what you're telling me is correct you're trying to drive a stereo sub -woofer with a mono amplifier. If so, that could be a bad situation for the amp, if the voice coils are not wired together correctly. Before we go too far, I have some questions I need answered. 1. Is the MA unit an M1889i? 2. Do you have the 4 terminals of sub-woofer tied together. For example the 2 positive terminals are tied together & the 2 negative terminals are tied together? 3.How do you supply 12VDC to the amp?
While I'm waiting to hear back from you, I'll try to draw a schematic (wiring diagram) of the way it should be wired for your particular setup that I'll send to you.
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.