Compact size: 8 ½ in (W) x 8 in (D) x 1 78 in (H) Wall or rack mountable Class J Stereo Modular design Auto Signal/Music Sensing Built in room corrections and 0 - 180° phase adjustments RCA input +12V Trigger Volume control 50 160Hz built in crossover 110V/220V Selectable Compatible with optional RM-300FR long ear extension bracket Technology Integrator's 2016 Impact! Awards Finalist