M&K, MPS-5310 subwoofer It has 2x12" acrylic polymer coated cellulose fiber sealed enclosure, inverted push-pull. 350 watts.THX approved.
The MPS-5310 amplified subwoofer makes this monitoring system truly full range (20 Hz - 20 kHz). It features MIller & Kreisel Professional's Push-Pull Dual Driver technology to virtually eliminate even-order harmonic distortion - revealing low frequency details that are masked by other subwoofers. The MPS-5310 also features M&K's Headroom Maximizer Circuit, which lets the full uncompressed dynamics of the mix to be heard up to the subwoofer's capacity while preventing amplifier clipping and distortion. M&K's Deep Bass sealed-box design produces significant deep bass output, wiyh an in-room response flat to frequencies well below 20 Hz. Unlike subwoofers with vented cabinets, which have an extremely sharp rolloff (24 dB per octave or more) below the lower limit of their "flat" response, the MPS-5310 reproduces bass frequencies below 20 Hz with excellent transient response, accuracy, and an authority that other subwoofers cannot match