Alesis M1 ACTIVE 320 USB

magnetically-shielded, polypropylene cone with rubber surround and high power handling voice coil [4 Ohm impedance]. Tweeter: 1" silk dome, TRS headphone output, stereo 1/8" TRS mini-jack input, switchable power-supply, pro grade 1/4" plugs and standard RCA jacks, stereo (L+R) inputs, USB monitoring system (2 speakers) with built-in audio interface. Woofer: 3" lightweight, 16-bit/44.1-48kHz recording and playback, bass boost: 4.8dB at 100Hz. Power: 10W per channel RMS. USB 1.1 audio interface, 1/8" TS output to passive speaker, 2x 1/4" phone jack inputs, frequency response: 80Hz - 20kHz, magnetically-shielded for placement near TV/computer monitors. dimensions: 12.7 x 15.3 x 19.0cm (H x W x D). Total weight: 3.4kg