Sub cutting out when volume is turned up

[Bunting78]

Hi I'm new to this forum, so if this post is in a wrong section or something of that nature, I apologize. I am having troubles with my system. When I turn up the volume my sub cuts out. I have a pioneer head unit(don't remember exact model) running an alpine mrp-m500 with 4 gauge power and ground pushing brand new installed tonight sundown E-12D4-V2. When I turn up the volume on the HU and the bass hits, it will play for a little bit the loosE the sub. The door speakers still play. The gain is right now set at about 1/4 and it still does it. Is the amp not big enough to power thE sub, or is it shot? Not really sure. Had 2 Rockford R1s powered by this sub just before this that I wasn't nice to. They started doing the same thing so I decided to up grade to the sundown thinking the subs were the problem. If anyone has any input or ideas it would be much appreciated.

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[BassAndBeer]

sounds to me like an electrical problem. whats your electrical? btw that amp is way to small for those subs. OR maybe you have been wiring your subs wrong all this time? its one of the two, either you amp cant provide for the subs and your electrical isn't having it, and its shutting off or your wiring is not right

 

[Boomin_tahoe 5,000+ posts]

Are your lights dimming? If so, that might be the problem....time for the big 3 to be upgraded. Some stock electrical can't handle aftermarket goodies installed.

I don't think the amp is the problem...its a 500 watter and pushing a mid level sub that doesn't handle much pwoer.

 

[Bunting78]

The wiringing is a gauge power and ground. And an adaptor kit for the the HU. Idk, what else are you looking for for on the wiring? I do not have the big three yet. And it's only a single 12" sundown that is 500rms which is what the amp runs too when wired down to 2 ohms. (500rms 2 ohms, 300rms at 4ohm) I have a capacitor not installed yet, thinking about it just haven't done it yet. And I was just kinda thinking maybe the amp because it's 3 years old and didn't do this before in the same vehicle wired the same way, and just now starting to do it.

 

[Bunting78]

Sorry, men to say 4 gauge power and ground

 

[CSCStang]

The wiringing is a gauge power and ground. And an adaptor kit for the the HU. Idk, what else are you looking for for on the wiring? I do not have the big three yet. And it's only a single 12" sundown that is 500rms which is what the amp runs too when wired down to 2 ohms. (500rms 2 ohms, 300rms at 4ohm) I have a capacitor not installed yet, thinking about it just haven't done it yet. And I was just kinda thinking maybe the amp because it's 3 years old and didn't do this before in the same vehicle wired the same way, and just now starting to do it.

Don't waste your time with a capacitor, they are junk. Have you run a multimeter on the amp to see where your voltage drops to?

 

[Bunting78]

I haven't yet. But I can try that after work today

 

[Bunting78]

OK so I just tested with the multi meter, never loose VDC coming into the amp, it does drop to like 9 vdc when bass hits hard, then quits playing but doesn't loose power to the amp. However when it does cut out, testing on the speaker output terminals on the amp, it cuts all voltage(VAC). Correct me if I'm wrong, but I'm fairly certain the amp is done. Would What ever is causing this inside the amp be replaceable/rebuildable?

 

[germanyt 10+ year member]

OK so I just tested with the multi meter, never loose VDC coming into the amp, it does drop to like 9 vdc when bass hits hard, then quits playing but doesn't loose power to the amp. However when it does cut out, testing on the speaker output terminals on the amp, it cuts all voltage(VAC). Correct me if I'm wrong, but I'm fairly certain the amp is done. Would What ever is causing this inside the amp be replaceable/rebuildable?

No your input voltage is just dropping to levels that cause the amp to go into protect. This is almost certainly an electrical problem like a ground. Any stock electrical system should power that amp no problem so if you're dropping to 9 then the wiring isn't right somewhere or less likely is that something is wrong with the amp. I'd check all connections and ground contacts thoroughly first. And be careful playing it. 9 volts is a serious no-no for an amp and anything lower than 11 could ruin your sub.

 

[Bunting78]

Alright thank you for your input. I'll check my ground. I thought I was pretty thorough when placing it by finding a good body bolt and grinding off all the paint. But I'll see what I can find.

 

[Bunting78]

I measured my continuity to ground and .4ohm where its at. Would that really be to high of resistance to make the this act up the way it is.

 

[Bunting78]

So I did some more testing. figured out my ground is good cause the .4 ohms was coming from my meter leads. Tested my power wire and found my problem. Reading 2.8 ohms on my power wire. Traced it back to find my fuse block spider web cracked and melted and power wire melted but the fuse not blown.