The ART SLA1 Studio Power Amplifier gives you the level of quality needed for your studio monitoring. With a super-wide frequency response (10Hz-40kHz), thermal-dependent cooling system, extremely low-noise electronics, and low-profile single rackspace design, it's ideal for both project and pro studios. Pair with the SLM-1 passive monitors for a great-sounding, cost-effective monitoring solution! The SLA-1 is rated at 100W rms/channel @ 8 ohms (130W rms/channel @ 4 ohms and 260W/bridged mono @ 8 ohms), hum and noise >100dB, input impedance of 22kOhm unbalanced (44kOhm balanced).