Clarion XR2110 420 Watt Mono Amplifier 2Way - 130W Max H.O.P Woofer Cone Rubber Coated Cloth Surround HDLD (High Density Layered Diaphragm) Midrange Frequency Response: 45 - 25khz 11.8 Power @ 4-Ohm 300w x 1 Power @ 2-Ohm 400w x 1 7 x 11 x 2.25 Number of Channels MONO MOS-FET Power Supply 2-Ohm Stable Selectable Bass Boost; 0/6/12dB @ 50Hz Adjustable Low Pass Crossover @ 30-300Hz Gold Plated Connectors; RCA/ Speaker/ Power Speaker Level Input Dimensions11-7/8" x 11" x 2-1/4"