Constant loud muffled noise coming from the sub and speakers.
There is a constant loud muffled noise coming from the subwoofer and speakers even if no song is playing. It used to work perfectly and then randomly this happened. I never dropped it, didn't spill anything on it...nothing ...the only thing that makes sense is dust being collected inside.
Oh and at first only the front left that had the muffled noise and then within a day or two the whole thing became like that.
Just to clarify: if i turn the system on without anything plugged in there is that loud muffle noise...
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I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.
If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.
All of the vibration from the subs rattled something loose, Most likely is the speaker to enclosure fasteners but it could be the case itself, internal baffles or even the speaker frame itself is coming apart.
Does the subwoofer have the same hum when the input cables have been unplugged? Many input cables use very fine conductors, which often fail. A bad cable will often introduce a hum and prevent a signal from getting through. If the noise is still present without the input cable(s) connected, then repair options are limited. No schematics are available. There's a daughterboard that has been available, but its failure usually causes the system to die (short-circuit). The cost to repair the amplifier may be close to the cost to replace the entire sub.
It sounds like your RCAs are pickin up noise somewhere, are your rca cables next to your amp power wire? this could be the problem. Just recheck your signal wires and make sure they aren't close to any significant power cables. Also does the noise only come from your subs or your car speakers to? If it comes from all your speakers you may have a headunit problem... hope this helps
check the cable 1st. If this speaker is powered, you could have a bad shield, or the power is causing a ground loop.
If the speaker is coming from an amp using speaker wire ie: 2 lead + - check the connection and make sure no fraid strands are touching each other on the rear connection.
In addition check your TV, Ap, And speaker system (if sub is powered independently) are all on the same curcuit.
a certain cause for ground looping resulting in hum.