Features Full Range Class D IR Chipset DirectFET Power Mosfet Output Stage SMD Technology on 4 layer Glass PC Board Conformal Coated PCB assembly for added water resistance ICAD circuit provides superior overload protection Frequency response 10 Hz 30kHz (Mono Block 10 Hz 350Hz) Variable 12db crossovers MICRO Bass boost +12DB @45HZ Premium 8 gauge power connections Multi channels / Mono channel Remote Bass Knob (Included with MICRO81U/MICRO82U)