I hooked the head and amp up no problem. It sounds great except there is
a beating noise coming through the speakers even after i turn the key off. it wont stop until i turn the amp off?? I turn the radio up and it drowns out the beating noise? this is on an old motorcycle. What is causing this?
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Re: head and amp all hooked up
Hi the problem you are having is inteferance from the servo on the bike this is causing a voltage spike and this is giving you the clicking noise you hear you can try buying an inline filter this should filter out the noise for you give it a try but you should find this solves you problem let me know if you need further assistance
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You are on the right track. It's not the amp, but it is the rca wires. When you have them plugged into the stereo, you can touch them together and it will make the same sounds you described also, though I don't recommend doing that! Rca wires can be weird sometimes but usually I replace them with new ones. Even a brand new set of cheap ones will do the same thing sometimes. The noise you here is causes by either a small short in the wiring, running the rca's to close to the power wire for the amp (or any other power wire for that matter), and sometimes you can buy a grounding kit for them that is fairly cheap that will help. Most of the time for me, it was just the connections, but replacing them basically took me through all these steps at once. Just remember, you still have a chance that your head unit is the cause by the connections getting old and wore out on the inside. Hope this helps!
It means that the subwoofer is blown. The red light is called the Protect light. Disconnect the speaker wire from the amp and then turn the amp on and see if the red light goes away. But if as soon as you hook the speaker wires back to the amp and the red light turns on that DEFINATELY means the sub is blown.
If you have tried different amps and different subs with the same result, I'd definitely suspect that you are not getting enough of an output signal from the head unit. Checking the RCA's and perhaps using a different set of preamp outs would be a good idea.
One other possibility that you may not have considered is to check the phasing. I've run into speakers that had the markings reversed and running the subs out-of-phase on a 4-channel bridged would make a huge difference in the bass.
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.
I often troubleshoot these issues via a stereo head set, modify the leads so you can "Touch" them onto the Speakers Output Terminals, connect the "Shields" together, thats "Earth" and the other Two, are Left & Right... with the Amp's volume turned to about 25% volume, connect up the Earth wires to the Chassis with a clip, under a srew etc, just make good contact... then touch the Left & right wires onto the output, ya should hear sound... if not most probably the Output device(s) may have gone faulty.