Clarion XH5210 90 Watts  X 2 Channel Power Amplifer Power @ 4-Ohm 90w x 2 Power @ 2-Ohm 160w x 2 Bridged Power @ 4-Ohm 320w x 1 Input Voltage Sensing Precise Frequency Control Number of Channels 2/1 MOS-FET Power Supply 2-Ohm Stable Adjustable - 18db. High/Low Pass Crossovers 55Hz-550Hz or 550Hz-5.5kHz with the Crossover Frequency Multiplier Variable Bass Boost; 0-15dB @ 45Hz Gold Plated Connectors; RCA/ Speaker/ Power Speaker Level Input Dimensions12-7/16" x 9" x 2-5/8"