SoundQubed 4x90W Class AB Multi Channel Amplifier Includes Remote Gain Knob (for use in BP/LP mode on channels 3/4) Stable down to 2ohm Stereo or 4ohm Mono Stereo Audio Outputs for Daisy Chaining multiple Amplifiers Double sided boards with high current MOSFET switching devices 24db/oct slope crossovers, Fully adjustable High Pass, Low Pass Filter and Band Pass Filters