NadySPA 1400 Rackmount Stereo Power Amplifier (500W/Channel @ 4 Ohms), paralleled & bridged mono modes, protection circuitry, XLR &  inputs, banana & Speakon outputs Reliable performance and top power in a durable steel chassis that fits in a standard 19 equipment rack Switchable stereo, parallel, and bridged mono modes meet the demands of a variety of applications XLR and 1/4" TRS inputs, along with Speakon and binding post outputs allow you to connect to a wide variety of sound devices and systems Parallel output connectors let you daisy-chain multiple amplifiers for additional power Detented volume controls let you make precise adjustments and recall them when necessary