I am getting a pair of A-7 Voice of the Theater bass bins, I was wondering what the best driver is to use between the 416-8c, 416-8a, or the 515, also was going to put a 311-90 horn with a 290 or 291 driver. any help would be greatly appreciated. My current set up is custom made K-Horn bottoms loaded with a EV Force 15, expon. wood horn dimm. 30"x15"x28. with JBL 2445j drivers, and JBL 2404 baby cheeks HF,JBL 2245H sub, Mac. MC-28, MC250, adcom 555II and MC225, with active crossover Ashley 3way. thanks I'm new to the forum. Ryan