amp keeps going into protect. DC lvl4 XL wired @ 1 ohm and 1 ohm stable amp

[sethbuckner 10+ year member]

ok so I finally built my ported enclosure for my DC lvl 4 XL dual 2 ohm. The speaker calls for 1500rms and is wired @ 1ohm, I have a basically brand new latest model memphis pr.1000.1 amp that's 1 ohm stable. 4 gauge wiring and a 1.5farad cap-(yes I know i'll be getting a kinetik battery soon) but anyways...... Even though my memphis amp only is pushing 1000/1100 rms the systems slams hard as shit. The digital readout on the cap didn't how much voltage dip at all. But if the volume is low it will continue to play fine but as soon as I turn it up loud and it really starts to bang my amp goes into protect mode. My amp isn't getting hot or anything it just goes inro protect mode. I'll turn my car/system off and the amp will reset and goes into ready/standby. And once again as soon as I turn it up loud it goes into protect again.

does anyone know what the problem more than likely is?

thanks, seth

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[ltr450racer690 10+ year member]

dont have the electrical to back it?

bad ground?

also how much gain and bass boost r you using?

 

[benzmansl65amg 10+ year member]

Big three done? could be volts dropping too low.

 

[sethbuckner 10+ year member]

my big three has not been done yet, and my gain is about 60% and I have 0 bass boost. My grounds should be good, they are located on my body of my trunk-(where the spare goes) on sanded bare metal. I wasn't thinking it would be voltage drops because of watching the digital readout on my cap. But who knows it could be wrong? I've used a multi meter to check the VC's on the DC and my amp load and it's reading 1 ohm. What would be the best place to start for my process of elimination?

 

[ltr450racer690 10+ year member]

how big of wire?

what size alt?

 

[Qxxx4]

1000+ rms on a stock electrical will definetely give some good voltage drops, esp if you got stock battery and alt

My guess is the amp is protecting because of low voltage

 

[deathpenalty18 10+ year member]

its deff the voltage man! take that cap off and your amp probably wont even go into protect mode bc all that cap does is kill you voltage!

 

[sethbuckner 10+ year member]

the power and ground size wire? Or the speaker wire? 4 gauge power and grounds and 12 gauge speaker wire. It has the stock OEM Alt for a 2007 Volvo s40. I can try to find out what my alt is pushing. Any other ideas?

 

[Qxxx4]

Get a voltmeter on your battery while its running, probly just running to low and the amp cuts out to save itself. See where your voltage it at before doing anything

 

[sethbuckner 10+ year member]

so use my multimeter to test the battery volltage straight from the +/- terminals when the system is playing? How much voltage dropping is acceptable and not?

 

[Qxxx4]

Yeah test it at a listenning level where the stereo doesnt cut out, and maybe have an exatra set of hands available, they turn it up until it cuts out and see what your voltage was reading at that point.

I know my old MA4000 used to cut out @ 11.2 or less

 

[sethbuckner 10+ year member]

should I take the capacitor out of the equation before I do this or see why it is doing this as is?

 

[Qxxx4]

Shouldnt be hurting your voltage, but they do **** so I would remove it

 

[sethbuckner 10+ year member]

if it was something wrong with the speaker such as a short in one of the voice coils, wouldn't it send the amp into protect immediateley? I hope it's my voltage! I'll be buying a 2nd battery really soon!

 

[sethbuckner 10+ year member]

and I checked the amp load-(the two wire leads that go into the positive and negative terminals on the amp) and it was like 1.3 so I doubt there's any short an the VC's