Ok guys / gals
bit of background..
I have been installing for almost 20 years.. Never seen this issue.
I have a 91 Chevy k1500
Im running:
2 3xl PB Subs
XTA 2250D 1 ch Amplifier
2 Yellow Top Optimas
Now when I am slammin the bass, and driving, the truck will literally hickup as the bass...