Ok i got an amp installed and would most of the time not have any sound. power is on(has the light). wat am i doing wrong?? also, when it does work my amp shuts off. and when i turn power on, light comes on and fades away immediately. are all these problems related?? pretty sure all cables are connected
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Re: NEED HELP ON AMP
Check voltages at the main power lead to/at the amp and also at the sense wire which switches it on when the radio is on. Might be the wiring is too thin and is switches off when current is drawn bigger than that needed to light up the light? That or the switching power supply inside the amp is unstable/dead.
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You need to plug in the RCA and speakers you could blow the amp. The amp is sensing no Input and No output. I would unplug the amp wait around 30 seconds then install the rca and speakers THEN install amp to battery + cable. You should be ok.
eyp, most of the time speaker connections blow and fuses wont stop that from happening. They are there to stop the mainboard from frying and not working at all. try running rca splitters to the operational side of the amp. run the sub on 1 channel. you will start hearing a difference but both sides will work. if not, run the splitters from the head unit and bridging it. these are the cheapest solution i could provide
bignatedabal: You can't get something more out of a device than it's rating. In other words, if you have a 400W amp that's all it's going to produce. For example if you're looking to drive both sub spkrs @ 350W each then buy a sub amp with a rating of 700W @ 2ohms & connect your 4ohm spkrs in parallel to the amp. Each spkr will produce 350W of sound if everything is installed correctly.
1 thing to look for in amp mfg's. Look for those who rate their amps in RMS power. This is the true output rating. Many amps are rated in peak-to-peak which seems great but doesn't tell you the real story, unless you know how to do the math to determine the RMS. The better mfg's will take the time to test their amps & rate them properly. Also look for massive heatsinking (the cooling fins). I consider cooling fans to be a benefit as well.
Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If the protect light remains on, the amp likely has blown output transistors.
Check the main amp fuse under the hood, even if it looks good just change it. Often times that light on the amp can come on just from the power amp tunon wire. Try a friends subwoofer box just to make sure the connectors on your box are good, and if that doesn't work then give me some more details....year/make/model of car, what kind of sub, what types of things do you see on the side of the amp....is there a green light as well as a red light?