Extremely flexible DBX MPA150 "Split Spectrum Amplifier"-150 Watt Subwoofer Amplifier. Has Line inputs and speaker-level inputs, along with sub and speaker outputs, can be used with low pass filter or as a full-range mono amp. Has low pass and subsonic filters, a balance control for use with stereo line inputs, and has a level control. This amp is in great shape, works flawlessly and looks very good. No marks or scratches noted. I do not have original box, but will pack thoroughly. Please contact me if you have any questions. Thank you.