Hello. I'm new this site and i'm searching for assistance with my setup rigging. I currently run 2 passive tops, 2 passive subs, and 2 amplifiers. I'm running them with a Pioneer DDJ-RX controller. i also use a super pro cx 3400 crossover. i want to include and additional sub. A CVA 121 (powered 21 inch cerwin vega). I'm searching for the best way to add this powered sub. Thanks for any help in advance.