The M-1230 Monitor 600W is a 2-way passive stage monitor housed in a stable wooden enclosure. It uses one 12-inch woofer and a coil-driver mounted on a mid-range horn, with a passive 2-way crossover and vented bass-reflex construction. The frequency response is 40–18,000 Hz, with 300 W RMS power handling, 600 W program power, 96 dB sensitivity, and 8-ohm impedance. The cabinet has black felt covering, a black metal grille, and protective steel corners.