Our new AMP amplifiers series dedicated to installations combine sound quality, easy installation and handiness. The AMP480, AMP4120 MKII and AMP4240 MKII operate at 100V, and have been designed to fit any installation. Their high-pass filter allows them to limit basses, allowing more subtle ambient music without compromising on power. LINK FOR FULL INFORMATION AND MANUALS: AMP4120MKII