Amp sometimes plays, then shuts off

[tristanlee85 10+ year member]

This happens sometimes as soon as the first low frequency when the sub hits hard, it will shut off right then and the sub will not play until I turn the car off and back on. Then, after that it may either go right back off or stay on. Also, it doesn't always shut off in the first hit. I can play it for a good while and it will shut off as well.

I've checked all my connections to the sub, amp, everything. They are solid. I notice when the sub goes off the amp is still on, but the 'protection' light is on. Does this mean it is shutting off to protect the sub, or is there something internally wrong with the amp? I know it isn't because it's over-heating because I have 2 fans directly on the components of the amp.

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[bigcarbigsound 10+ year member]

you might be running the amp at too low of an impedence

 

[tristanlee85 10+ year member]

Well, I have it wired up at 4ohm and the amp is capable of 4ohm bridged

 

[tristanlee85 10+ year member]

I mean, could the amo be sensing that I am putting too much power to the sub and it's shutting off to save the sub?

 

[bigcarbigsound 10+ year member]

I dont think so but the sub might be drawing too much current I dont know. Is it still under warrenty?

 

[tristanlee85 10+ year member]

No. Well, the amp may be putting more power into the sub than it can handle. The sub is rated at 700rms and the amp is 900rms @4ohm

 

[ANeonRider 10+ year member]

No. Well, the amp may be putting more power into the sub than it can handle. The sub is rated at 700rms and the amp is 900rms @4ohm

An amp will not such down if the power it is giving to a speaker is too much, or more than the subs RMS, it is not that smart. //content.invisioncic.com/y282845/emoticons/rotflol.gif.b453361716769b8110ddefc85ff03cd2.gif It will however shut down if there is a short on the VC, or anywhere else in the system or if its gets too warm.

 

[tristanlee85 10+ year member]

Oh, maybe that's it. I dunno.

 

[bigcarbigsound 10+ year member]

if the amp is no longer under warranty try taking the cover off and just take a look and see if there are any obvious signs of deterioration.

 

[tristanlee85 10+ year member]

I don't run with the cover on it anywa cause I have fans on it. I'll take some pics to see if anyone can figure it out.

 

[tristanlee85 10+ year member]

I'm still having this problem. I measured the resistance of the sub at the terminals of the amp and it's reading 4.3 - 4.4ohm. Could that be why?