This auction is for a brand new Boss PD4000 Amplifier. 
This Amplifier Features: 

Max power 4000w, RMS power, 4ohm@.01% THD 500w x 2, RMS power, 2ohm 900w x 2, RMS power, 1 ohm 1500w x 2, 1/2 ohm Stable stereo Power 2000w x 2, Frequency response (+/- 3dB) 9Hz to 50kHz, Signal-to-noise ratio >105dB, Channel separation >90dB, Low pass Crossover 50Hz-100Hz, High pass Crossover 120Hz-720Hz,Bass boost 0-+18dB, Bass boost Frequency 50Hz-100Hz, Dimensions, LxWxH 25 1/4" x 13 3/8" x 2 3/4".