So to start off i installed these myself and had two subs before that we’re old so I would turn the gain up way higher and beat them up. I finally got new ones and re tuned the amp to more reasonable levels and when I turn it up loud it makes a pop sound then cuts out when the bass hits. If i turn it up while the bass is hitting it doesn’t cut out till the next bass note hits. I have two kicker comp vr’s powered by a 600 watt infinity kappa k600. I’m at pretty positive the ground is not my issue as I had a similar issue and fixed the ground problem.