Designed for custom installers, ADCOM distributed audio amplifiers have all the features custom installers demand, and the power to deliver audiophile sound and ultra-reliable performance. The GFA-600x series is designed with toroidal transformers, dual pairs of output transistors, FR4 fiberglass circuit boards and ultra-efficient heat sinks. When you need amplifiers, remember, no company can match the legendary power of ADCOM. 12 volt trigger on/off Auto-on music sense RCA in and out per channel Stable into 2 ohm loads Input level adjust Ground lift switch Bridged output mode Thermal efficient design minimize