Nice! Looks like its doing some work.
I had a level 4 12 and they are definitely strong subs I almost got some level 4 18s at one point and thought about some 15s as well. Maybe next build I will try DC again but theres so many good subs out there to try.
I just got done with my build 2 sa-15s walled on an ap3k and its pretty healthy as well.
I wish I coulda fit the 18s though!