The USM-1 is a high-powered, wide-coverage loudspeaker for professional stage monitoring applications. Specifically designed for touring reinforcement, the accurate, rugged USM-1 is a biamplified system consisting of a proprietary 15-inch low-frequency driver in a vented enclosure, and a 70-degree high-frequency horn with 2-inch (throat diameter) driver. The USM-1’s drivers provide exceptional efficiency and power handling, with low distortion for maximum clarity. Its very flat frequency response allows control of feedback at high stage levels. The sturdy, multi-ply hardwood enclosure with textured finish is designed to withstand road abuse. The USM-1 comes with handles and, optionally, aircraft-style rigging pan fittings. The USM-1 requires a high-quality professional stereo power amplifier capable of delivering up to 600 watts per channel continuously into 8 ohms, with a signal voltage gain of 10dB (minimum) to 30dB (maximum).