DESC: The 2 and 4 channel models are bridgeable for flexibility in system design. Variable high- and low-pass crossovers along with variable phase shift control allow you to fine-tune your system for a supreme listening experience. The eye-catching chrome finish is further enhanced by the red-illuminated B-L-A-D-E logo on the top of the amplifier. For the ultimate in system flexibility, BLADE amplifiers feature RCA and high-level inputs as well as RCA outputs for system expansion