SRAs are advanced, efficient amplifiers perfect for installations with modest power requirements. Housed in a compact single rack space chassis, and weighing only 10lbs, they're designed to drive 4 or 8 Ohm loads. Choose from 4 models available in 2 and 4-channel configurations with power ratings of 75W and 150W per channel into 4 Ohms. The 150W models arecapable of driving 25V constant voltage lines directly. Switch mode power supplies and Class-D amplifier circuitry provide an extremely power efficient solution. They are convection cooled, so little maintenance is needed after the installation, and no annoying fan noise.