Bass surging?

[BigAl 10+ year member]

First my setup is two kicker cvr 15 d4 powered by a memphis mc1.1000d ran at one ohm. What my problem is that my system has been working fine then one day after playing a bass heavy song it seemed as if I lost maybe a 1/4 of my output from my subs but then it got back loud and then i lose some output again. This goes back and forth. I thought one of my voice coils might be messed up but i checked each voice coil by plugging it to my amp individually and all four vc are playing. Could this be in the amp? Oh and the big 3 has been done and I have 0 guage wire running front to back. Can someone help me with this or let me know what I need to check and how.

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[mylows10 5,000+ posts]

maybe a loose rca connection or bad rca

 

[BigAl 10+ year member]

i will check that

 

[BigAl 10+ year member]

I'm thinking it's gonna be in the amp. I checked voltage and it was 13.9. I swap RCA cables and it did the same thing.