Had this amp 3 years now and over the last 2 weeks it started making a beeping noise from the ground connection...i opened it up and saw nothing only i could pinpoint where the noise is coming from....just over the last week everytime i go over a bump the bass thuds hardcore...i have 2 of these amps so i took the rca's out of tis one and put them in the other one and it doesn't happen..so i put it back in the other amp and wiggled it a bit and the thudding went crazy..somthing loose?? i am considering taking it into a repair shop but i want to check here first to see if there is a simple,cost effective solution
BTW: the amp itself still works great but the beeping and the new thudding are cause for concern
any input would be appreciated
Re: jerky rca input/beeping from ground connection
From what you say i feel that you have a dry joint around where the rca socket is soldered on to the board- use a magnifying glass and plenty of light to look around the sockets,They may be soldered under the board which means you need to disassemble the whole amp in most cases. a dry joint is basically a slight crack(very hard to see sometimes) around the solder which causes the subs to thud. but i might also be a faulty rca socket. Pretty easy to fix if your good with a slodering iron,all you have to do is to reheat the solderpads so the solder flows again and then hopefully it will set properly without any dry joints. If not take it to a tech and he should have it fixed in no time and should only cost like 20-30 bucks, might be a little more if you need a new socket but not much,probably another 10-15 bucks.You said that you could pinpoint where the beeping was coming from, Can you tell me where or what it is coming from?
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Re: jerky rca input/beeping from ground connection
Sorry man but this sounds like the start of a horror flick???lol Ok Sorry man but if it occours from the ground then you need to move the ground and reinforce the ground of needed as maybe the chassis or ground your using is not up topar as a matter of fact try running a direct ground from the battery to the amp at least a size 10 to 08 size wire. Good luck
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The RCA connections are best. If you have electrical noise, make sure you have good ground contacts. I'm talking all of the ground connections in the vehicle. You can also use a ground loop isolater to prevent some noise. Ground Loop Isolators (a page with some explanation/theory)
They can be bought pre-made for about $15 - $20. The one pictured is an example.
Check the output of the amplifier with the input connections disconnected. Does the sound go away??
If it does, then connect each input one at a time and see what happens. If the sound appears, then do the following:
The ground connection on RCA connectors don't always make a good electrical connection. This is the outside ring. If the RCA connector goes in easily, the the outside ring should be compressed slightly to garantee a snug fit. Do all of the RCA connectors, at the amplifier end and at the radio end.
It could be the way that the amplifier was installed. the ground lead should run directly to the battery NEGATIVE terminal. This will greatly reduce noise produced by other equipment.
If the lights on your sub box aren't coming on it's either your ground of power wire came loose or the transformer blew. As for the subs, make sure all the connections are good, especially on your RCA wires. If your amp is getting power, then check your speaker connections. Also, make sure to turn the gain know up. The gain knob is located next to the RCA input on the amp. Let me know if this helps.
+ positive from battery ground is of course - anywhere on body put it on last.to avoid sparks if + is powered up! U can put a link between remote and positive it should then be on. Led normally goes blue rca s need a signal from stereo make sure its a amp out or sub out not an input on stereo set all knobs to middle and if speaker is connected to amp speaker + - it should be on, try an mp3 player with jack to rca for testing a known signal.amp may have loop rca make sure its on inputs.some have high inputs too using speakers wire stick with rca
(1) If you have an ohm meter check from neg terminal of battery to body of your car. It should be below 1 ohm. You should get the same reading between the amp neg terminal and the amp ground point. Check amp ground with the power off and the wire to the negative on the amp temporarily disconnected. Most cars have a braided uninsulated ground strap from the engine to the body or frame. In older cars this can break and it usually causes noise. Run a temp ground wire from the battery neg to the bat neg of your amp, if the noise goes away it's a ground issue for sure. (2) Make sure the amp is well grounded ! The bolts that anchor the seats to the floor are one of the best ground points I know of. (3) I've fixed a few amps that had an internal broken connection from the RCA's on the amp where they connect to the circuit board. This often happens from not having the amp bolted down and/or the RCA's getting hit or kicked. This will cause noise in the amp and requires taking the amp apart to fix it.
Two things, a ground loop isolator in-line with the RCA's between the head unit and the first amp.....also a noise reducing capacitor ( $5 or$6 at an auto parts store) on the alternator 12v post will reduce or remove the hum.
The RCA inputs of the amp are many times NOT tied to chassis ( the chassis of the car ) ground.
Same goes for the RCA outputs of your head unit.
The speaker outputs of your amp SHOULD NOT EVER be tied to chassis ground.
make sure that no speaker wire from the amplifier is touching or attached to ground.
Make sure that your amplifier ground (GND )( of the 3 power inputs.....GND, +12V, Rem) is securely mounted to a bare metal spot on the frame. Best practice is to have the amp GND, and the head unit GND at the exact same physical point.
Make sure that your RCA cable shield ( not the center tip, but the part around it ) is not touching the chassis.
Make sure that you have not nicked the wire while installing it and are accidentally getting a connection to the frame of the car.
Make sure that the head unit is grounded properly.
IF for some reason you have an equalizer between the head unit and the amplifier, make sure it has its own switching power supply INSIDE the EQ.
Bad grounds are a pain to troubleshoot......best of luck....Rob
The problem is not likely the amp. The length of the ground to the amp is not as critical as a good solid connection. Clean any paint and dirt from around the ground connection. It should be clean and shiny metal. Anyway as a test disconnect the RCA's from the amp while the amp is on and see if the sound goes away. If it does then the problem is not in the amp but either the RCA cables, the RCA grounds in the head unit (radio) or bad routing of the RCA cables. Depending on the how old the car is this noise can be coming from your spark plug wires as well. As a last resort you can try a new set of supressor ignition wires for the car.