SEIKI SB201 Home Theater Audio 2.0 Channel 37.5" 35W HD Sound Bar Speaker System (Certified Refurbished) This Certified Refurbished product is tested & certified by Seiki to work like-new. The product includes all original accessories, and is backed by a 90 day warranty Full range: 200Hz - 20kHz (+/- 3dB); Speakers: 2x 2.5" full range, 2 2.5 woofer Woofer: 60 Hz - 10kHz (+/- 3dB) Audio Amplifier: Intergrated Class-D @ 20 watts x 2 CH, 4 Ohms THD = 1%, kHz Supported audio engine: high-peformance 32-bit 73.728MHz DSP audio engine Input sensitivity (mV): 500 mV rms