sub clipping

Me and a buddy just installed a Skar 12 into my 2017 Terrain. Tuned it while parked using an extremely bass heavy song, got it absolutely slamming at 30 volume and I planned to keep that as my max. Then hopped on the road drove around listening to music and that same song made my Lc2i line...

Hi all, my 2 Pioneer champion pro (TSW3003D4) subs are clipping a lot. This mostly happens when I really turn up the volume. However, the subs output 4000watt total. What I hear is definitely isn't 4000watts. I am using a Hifonics Colossus Pro 5k. The subs are wired up at 2 ohms each. My...