Profile: Bogen Communications International, Inc. provides sound systems and telephone peripherals for commercial, industrial & institutional applications. Our products include mixer amplifiers, power amplifiers, cone speakers, horn speakers, microphones and foreground speakers. The M-class power amplifiers have 3 stereo power levels of 300W, 450W or 600W per channel at 4 ohms. They have 2 module input bays for flexible modular input capability, and a 2 x 1 mixer function in mono modes. The HFCS1 high-fidelity ceiling speaker has large heavy-gauge plated steel back can for deep bass response, and computer-matched dual venting system for full bass output.