The MJ Acoustics Reference 100 is a 1-Way Powered Subwoofer with a frequency response of 13 Hz - 200 Hz and 120 Watt peak power handling. Featuring an impedance level of 100 ohm and 99 dB sensitivity, it produces clear sound. There are separate gain controls for high and low level inputs, a straight-through LFE bypass and an audibly transparent, Automatic Speaker Protection (A.S.P.) circuit which monitors the output stages for clipping and limits the cone movement if the amplifier is being over-driven. Furthermore, the Neutrik Speakon connector is standard for the Reference 100's stereo high level input.