Specifications Frequency Response: 500Hz‒5kHz 3-16 Ohms input impedance 20W max. output audio Impedance: 8 Ohms Requires a 10-16VDC (power supply not included) 2A, 3AG fuse Dimensions: 6” (W) x 6” (H) x 6.25” (L) Weight: 3 lbs.