I recently had installed a DUB1002 amp and now 4 months later it's not working. The amp itself turns on because I hear the fan moving and the led light status is red but no power to the woofer. When I mess around with the fuses connected to the amp the led light turns green and is giving power to the woofer, however, after I turn the car or radio off and then back on the amp goes back to it's original status of giving no power with a red led light. What could possibly be the problem here?
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if the light still comes on then the fuse is still good....
a possiblity exists that either the amplifier or the actual speaker itself went bad....if you like you can dissasemble the the subwoofer to access the insides....a simple test....if you connect the driver to another amp (any amp will do as this is just a test) and it makes sound then chances are your amp is bad or just a loose connection.
Some older Pioneer radios require you to connect the Subwoofer RCA to the rear output on the back of the radio and then you have to turn on the subwoofer in the menu on the radio. What model Pioneer radio is it? Also, make sure that the RCA plugged into the amp is on the input side, not the output side.
I had a problem with no audio and I recently found the fix. When thesub still worked and you turn it on you hear one relay click and thenabout 5 seconds later a second relay clicks and the audio comes on. Theproblem I had lies with that second relay. When you take the case apartthere are 4 circuit boards. The big board with the two big bluecapacitors is the main board. Well next to the two blue capacitors is ablue relay. That relay had a pin that came un-soldered from the circuitboard. I re-soldered that pin and the sub works just like new. If yougo here http://www.eserviceinfo.com/downloadsm/20627/sony_sawm500.htmlyou can find a free service manual that has the wiring schematics forthe amp. Hope this helps!
You should be able to check this yourself pretty easily, Just connect the power and turn it on. Connect an audio cable to the input. Make sure the level control on the sub is turned about halfway up or more. Now, touch your finger to the tip of the plug on the other end of the audio cable. You should get a nice hum out of the subwoofer. If not, then the sub is bad - if it has a user-replaceable fuse you might check that first. If you do get a hum out of it, then the sub is ok, and the problem is elsewhere. Might be a simple as a bad cable or an option on your amp/receiver is set wrong.
No the reson for the amp overheating is do to the OHM ratting that you have the sub if to have the both wired up then just wire one up and that will give you the OHM ratting that your amp is ratted for the way that you might have it is the way that we wire them for coms. where it is on for 30sec and no more. if you would like more help let me know. [email protected]
If smoke has come out of the subwoofer, the speaker itself, that means the voice coils have been heated excessively and they are damaged or in this case, I'd say completely blown. Voice coils blow because they've been driven too hard, too much power, too much distortion for too long.
If you can get access to the front of the subwoofer speakers, gently put even pressure with your fingers near the middle of the cone, just around the edge of the centre dust cap and push gently and slightly inwards. If you hear or feel a "scratchy" type sound or feel, or if they dont move in freely, they are blown. And if that's the case, your amp could be damaged as well.
Most modern car amps have circuit protection and will shut down when they detect a load greater than they are used to so the amp MAY be ok. One way to test the amp is to hook another speaker to it, any speaker as a test is ok, and see if sound comes out. Make sure all power is off when connecting and disconnecting speakers!
This, to me, is most likely the voice coil inside the driver rubbung against the yolk plate, or possibly the spyder slapping the metal plate underneath it, or the amp-(if it has one?) getting tired. this can occur from poor build quality, or playing the subwoofer too loud. depending on how much it cost you, you may want to get it repaired(voice coil re-alignment or something or new amp). But the way it seems, it is probably the driver itself. subwoofers get looser as they break in. This one may have been over-broken....sorry
here is a short test you can try, remove the rca audio cable from the amp & connect a diskman or toher audio o/p device that you can hook up with the same rca wires, turn on the amp & see if you have sound. you can also remove the speaker wires from the sub & using multi meter read the ohm's of the sub, most subs are 4 ohm. Hope this help locate your problem
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