KNOLL SYSTEMS MA215E 2-Channel 15-Watt Zone Amplifier with Eco-System • 15W X 2 Channels • 2 Ohm - 8 Ohm Stable • Energy-Saving Eco-System(Tm) Circuit Shuts Down Amplifier When No Signal Is Present • Includes Volume/Gain, Bass, Treble & Balance Controls, Gold Rca Inputs For Years Of Reliable Service & Wall Mount • Compatible With Most Speakers