The extremely efficient Class-D topography used in the ART SDA1 Studio Digital Amplifier delivers 200 watts per channel (at 4 ohms) in a compact, single rack space chassis. Taking advantage of the full potential of digital amplifier design, the SDA1 does not t require noisy, dust collecting cooling fans in operation, making it the ideal solution for studio control rooms and installations. SDA-1 Applications Flat 20Hz to 20kHz frequency response makes the SDA1 the perfect choice for critical listening in studio environments Balanced inputs and versatile multi-way binding post outputs ensure quick connectivity to any source and speaker combinations, including 70v commercial installation systems Solid steel and aluminium chassis design ensures maximum reliability Recessed pop-up detented attenuator knobs deter uninvited users adjusting volume settings in install applications