The Intellivox-DSX280 HD is capable of providing a constant sound pressure level over a distance of up to 35m, although a substantial extension of this range can be achieved in less demanding acoustical conditions. The twelve, custom designed, 4” loudspeakers and four discretely controlled, 1" dome tweeters are driven by a sixteen channel class-D amplifier, powered by a sophisticated switched mode power supply, all of which combine to ensure years of reliable operation. The individually driven horn loaded dome tweeters in the DSX HD units provide unsurpassed high frequency vertical beam control while improving the horizontal coverage and enhancing the subjective sound quality of the system for both speech and music.