Utilising Peaveys revolutionary IPR™ power amplifier technology, the Impulse 12D produces 1,200 watts of efficient power while weighing a very lightweight 39 lbs. IPR amplifiers are designed with a lightweight switch-mode power supply and a high-speed class D topology that yields the highest audio resolution and efficiency available.The Input section features two input channels and a line output, with a mix of I/O options such as combination XLR-1/4 jacks, RCA and install-ready Phoenix connections. Input channels 1 and 2 also have mic/line source switches and gain controls. The Auto-Off function automatically shuts off the power when it no longer detects a signal, while the Line Out allows the user to chain multiple units or send the input signal to another source.The DynaQ™ section offers advanced tone controls such as Bass Enhancer, which is an overall loudness boost; a Music/Speech switch that provides optimised EQ settings for each audio type; and Contour, specially configured for program music. A module bay allows for future expansion including Wireless I/O, Delay/Time Adjustment, Mixer Expander, Ethernet I/O and more.The Impulse 12D is housed in a durable, injection-moulded enclosure that includes a pole mount, three flying points and a tilt-back design to facilitate use as a personal monitor.Features/Specifications: Auto off controlTwo independently mixed input channels, with level controls and mic/line switch12 field-replaceable dual voice coil premium neodymium speakerTwo-way, bi-amplified, optimised active servo drive loudspeaker systemProprietary 120 mm ribbon driver on a low-coloration wave guideCombo XLR-1/4 and Phoenix connectors on channel 1Combo XLR-1/4 and RCA connectors on channel 2XLR, 1/4 TRS and Phoenix outputs on Line OutWoofer Servo technologyExclusive DDT™ anti-clipping protectionBass Enhancement circuit provides automatic equal loudness compensationMounting bay for optional input function modulesRugged polypropylene moulded enclosure with tilt-back design for monitor usePole mount moulded-inTop, bottom and side flying point insertsLED control switch: Power/signal/Off Great sounding speaker Currently working well, having replaced white switches in the past also serviced and inspected previously.Having worked for Peavey in the past this is a speaker system there is no longer supported under warranty parts by Peavey. Ideal if you are able to service and repair the speakers as cannot guarantee the reliability thats reflected in the price. 1,200 watts from Peavey IPR(YM) power section