Two (2) Music Reference RM-10 Tube Amplifiers ~ 70 Watts Per Channel on Mono Switch & 35 Watts Per Channel on Stereo Switch ~ These EL84 Amps are Very Sweet / Highly Involving GIANT KILLERS ~ PERFECT WITH PARAGON, QUAD, OR MAGGIE SPEAKERS ~ WITH A SUBWOOFER ON 2-WAY SPEAKERS, THEY SOUND LIKE AMAZING 150 WATT AMPS