That is nuts ^^! I am really liking this sub and it really stays cooler longer than my Treo SSX which use to get so heat soaked. It was weird, I would bump it with my XXX-6500 and this is on 17+V at 2ohms, the sub would get hot BUT it wasn't playing anywhere nearly as loud. I kept the signal clean, even reduced input and used a remote gain but the sub still hot hot and once even spelled it a tad. Now I add this Z1a and it is a different animal all together! It is a lot louder, sounds better and the sub stays cool as hell, no joke!!. I bump that thing hard, the amp is modded (self modded) and it runs on 17+V but at 1.5ohm. I am backing up the power with a single BatCap 8400 (16V) and two 2200's also 16V. With the XXX I use to be able to go 2-3 days without charging mainly to work and back, 1 hour each way but with the DD I get 1-2 days depending on the bumpage so I know it is pulling a bit more current. Polo..