Sony Xplod GTX XMGTX1821 1,000W 2 Channel Amplifier (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Maximum Output Power: 1,000W Speaker Impedance: 2-8 ohms Inputs and Outputs: 1 x audio-in, 1 x audio-out, 1 x RCA-pinspeaker jacks, 1 x terminals Built in Low-pass filter (80 Hz, 18 dB/oct)