I just bought a XAF 460 amp, It will be pushing a Pyramid 8" sub, I had everything connected (dry run) playing just the radio it sounds good. then I switch over to the cd player (6pk) that sound good, so as I started adjusting the gain the amp when into protection mode I reset it played for a bit a did the same. I doubble checked my connections eveything had a good but it continued to play a little then cut off. How much would the ground play in this? Because as I said this was a dry run, the grounds as I think back may not have been in a very good spot.The head unit is a Jensen cass/6disc cd.
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if you have a protection light that is on it means the amp is in protection mode and wont allow any power to the sub this usually happens when the sub or wiring shorts out or if there is an internal failure in the amp or if its overheating. check the wires and connections and test your sub on another amp.
Honestly listen to it buy ear. Thats the best way to "tune" your amplifer and your subs. I would turn your stereo to the desired volume level then start tuning your amp while it's playing. Make sure that you put the signal all the way down to start with and if you want it louder, that the signal level (knob) is the last thing you turn up.
It could be even simpler than that, yes an improper impedance rating on an amp will cause it to overheat, but should function temporarily until it reaches peak temp. If the outputs were blown the protect light should not light up being that they would need to work to cause the protect light to come on. I would double check all of your connections, one small little crossed wire would cause an amp to immediately go into a protect mode.
If you know how to use a multimeter, you can test the amp this way:
-unhook the subs -hook up a cheapie speaker you know for sure works to one of the channels -unhook the audio inputs -turn the amp on -set your meter to VDC -put the positive probe on the inside of the input connector, being sure you make contact with th inner contact -take the negative probe and tap it on the outside of the connector
you are doing is sending a low voltage (replicating an audio signal)
into the amp audio circuit and allowing the amp to amplify it. If the
amp makes the speaker pop each time you strike the probe, the amp is
There is an inherent problem with band passes. The naturally filter out high frequencies like a crossover, including distortion, so it makes it hard to hear when the subs begin to protest.
The red light means the amp is in protection mode. A few things can cause protection mode.....
First disconnect the subs completely from the amp, and turn it on, if it powers up you have blown subs.
Also try checking the main power wire at the battery...sometimes the current your meter is seeing is backfeeding from the remote wire, so your main power line could be blown at the fuse under the hood.
hope this helps
Hi Saint108. You're describing it well, and i know what the problem is already. The MA audio amp, can't hold with a 2 ohm load. It's too low for that amp, that's for sure. Those are budget amps and they are not well built enough to handle low ohm setups like that. It's overheating and there's no ways around it..
Other than wiring your subs differently ! Just wire your sub directly (not in parallel) in a 4 ohm load, you will notice it will stop overheating that much. Do it quick, you'll most likely fry your amp giving it such hard work !!
The HUM you're hearing could be related to it also. Try that, and keep me posted on the status. Thanks ! Cheebster.