First up is a DD C4a. It is a 4x100 @ 4 ohm amp, with built in crossovers that will easily handle a 2 way active setup. Best part, its 1 ohm stable. DD says it will do 175x4 at 2 ohm, and 200x4 at 1 ohm! Also is bridgable down to 3 ohm, where it will do 400x2. This amp is a beast, and...