Came from a working stereo, subs sounded excellent with it, near new cant really see any physical damage. FXA-1500 MONO BLOCK POWER AMPLIFIER SPECIFICATIONS: 4 Ohm RMS Power: 1 x 300 Watts @ 13.8 Volts 2 Ohm RMS Power: 1 x 500 Watts @ 13.8 Volts Frequency Response: 20Hz - 300Hz S/N Ratio: >100 db Damping Factor: >200 @ 100Hz Minimum THD: <0.05% Dimensions: 13" x 11" x 2.75" $200 pm me or email [email removed]