Pyle PTA3000 3000W Professional Power Amplifier (Certified Refurbished) This Certified Refurbished product is tested & certified by Pyle Pro to look and work like-new. The product includes all original accessories, and is backed by a 90-days warranty. Speaker/Terminal Connection, And SPEAK ON. Two Channels Bridgeable 110/220 Volt Switchable Frequency response: 20Hz-20kHz