The Alto SXM112A delivers a big sound with a high-performance 12-inch LF driver (2-inch voice coil), and an exacting 1-inch HF driver. What's more, it utilizes a trapezoidal design which greatly decreases the resonance of the standing wave in the cabinet for a more true and exact sound reproduction. The SXM112A is the perfect solution for club installations, rehearsal spaces, gigging musicians, mobile DJs, and houses of worships who need additional sound reinforcement. The SXM112A houses more than just great sound under the hood, it features a built-in Class D, 400W bi-amplified system (800W Peak). As a self-powered stage monitor, all you need to do is plug in your audio and power cables, turn it on, and you're all set. No external amplifiers to set up or transport — it's all built into the SXM112A.