Been awhile since I've been here, but here we go again. I'm currently running 2 Sa-12s on a jbl 1500 mono in a box tuned to roughly 35 hz. I'm debating tossing a bigger amp on these but not sure what they can take max. I rarely have clipping issues and I listen to mainly dubstep. I could also get fancy with a box design, in which case I need a designer / builder. Long term goals I'm looking to install a HDc 4 18 on 4K, so if these could handle 4K, I'd **** around with that until I got the new sub. Thoughts, opinions , concerns ?