AMC120 - AMPLIFIERS   Fitted Headphone Amplifier - Order input and Red / Green light AMC 120 is a device used a signal monitoring and red/green light control. This is in slot unit features a high performance amplifier for two low impedance headphones, with volume control. * One headphone output with volume on front panel. * Two 1/4" headphone connectors. * One "ON" light. * One signal input, using female Sub-D 15. * Applications AMC 120 is well suited for SPEAK cabinets, allowing to manage signal monitoring and broadcasting.