Well I'm gonna bump it again. I would like to know also.
Another thing...do you know if that's the settings for the preouts or for the internal amp itself?
Yeah that's definitely your problem. You're prolly playing songs in the low 30s, high 20s. To keep your subs safe, your subsonic should be around 40hz...which you're not going to like the way that sounds.
I really don't see those subs lasting long at all. Even wired to 4ohms there going to be seeing more power than they wanna.
He won't need to add a second batt because you aren't going to be able to wire em down to 1ohm. So the amp won't pull too much current.