weird sound/cutting out

[caraudio93 10+ year member]

I have an audiopipe APSM-1300 and its hooked up to an audiopipe 15... I set the gain with a DMM to 31.6volts for 500 watts RMS @ 2 ohms. And when I set it the volume on the headunit was 37. I noticed that, when the volume goes past 42, the power to the sub will cut out for like a half second at a time and the sub will make a popping sound when the bass gets heavy, and I first thought it was just simply because it was too much power for the sub. BUt my friend just bought an L7 that is 750w RMS, and I hooked it up, and turned it up past 42, and it did the same thing, so now i know it's not my sub. Question is, what would cause the amp to cut out like this, its a 600w RMS amp and i have it running at 500 when the HU volume is 37. so 42 shouldn't be too much power for the amp or the MTX sub. Any suggestions? Might it just be something as simple as a bad ground...? Thanks.

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[sacsking916 5,000+ posts]

probably clipping the signal from the HU to the amp. possible?

 

[caraudio93 10+ year member]

well i thought so, but i unhooked the amp and turned the HU all the way up to 65 and it didn't clip the speakers.

 

[Falcons 5,000+ posts]

wires are burnt out. same happened to me.

 

[caraudio93 10+ year member]

what wires though. speaker...power, ground....? all the wiring is brand new the only thing that could possibly be bad is the ground, i think. or speaker wire might be too thin.

 

[Falcons 5,000+ posts]

what size speaker wire you got? and where is your ground? what size power/ground? you should be running at least 4 gauge

 

[caraudio93 10+ year member]

power and ground are 8 guage, but they're only like 6 feet long. i have no idea what size the speaker wire is but it's pretty tiny. probably like 24 guauge.

 

[Falcons 5,000+ posts]

thats your problem. upgrade to 14 guage to 12 gauge at least. 24 gauge should only be used with small speakers that handle 75 watts tops.