The Atlona AT-GAIN-120 (Gain 120) is a compact 120 W Class D power amplifier for commercial installations such as meeting rooms, training rooms, classrooms and facility paging or background music systems. A mode switch sets it to deliver either two channels of 60 W into 4 or 8 ohm program speakers, or a single 120 W channel for 70 V or 100 V distributed ceiling-speaker systems. It is convection cooled with no fan, so it is silent in quiet rooms, and is ENERGY STAR qualified with automatic standby after 5 to 25 minutes without signal. A balanced line-level output lets the incoming audio feed another amplifier or system. The Gain 120 has a 5-band equaliser, rear input level controls, protection against clipping, shorts and overheating, low inrush current, and front-panel status LEDs. It can be controlled over TCP/IP (volume, mute and EQ) or woken and powered down through a trigger input, and integrates with Atlona switchers, OmniStream and Velocity control. An optional AT-GAIN-NET card adds Dante/AES67 network audio input. It is a half-rack 1U enclosure (43 x 220 x 330 mm); the AT-RACK-1RU shelf is needed for rack mounting. Atlona lists it as discontinued, replaced by the AT-GAIN-M120.