d&b audiotechnik D12 Hardware Manual

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d&b audiotechnik D12 Hardware Manual Manual pdf 7 page image

3. D12 Amplifier3.1. D12 based systemsFig. 2: D12 AmplifierThe d&b D12 amplifier is a two channel power amplifier thatincorporates digital signal processors (DSP) providing loudspeakerspecific controller functions. It is designed for use with all current d&bloudspeakers, and a linear mode is available.The D12 is designed with both digital and analog signal inputs,loudspeaker outputs, and has remote control and monitoringcapabilities.The switch mode power supply will function with a variety of mainsvoltages and allows less weight at high output power.The level control on the front panel incorporates a digital rotaryencoder, which enables selection of all operating modes in conjunctionwith a Liquid Crystal Display (LCD). The D12 includes complete signalprocessing, all necessary protection circuits, REMOTE and SERVICEinterfaces, all connectors and status indicators.The D12 is housed in a 19" x 353 mm (13.9") 3 rack unit enclosuremade from stainless steel with an extruded aluminium front panel.3.2. D12 block diagramOutputroutingPoweramplifierInputroutingAnalog AAnalog BDigital ADigital BSignalgeneratorsine wave orpink noise foracoustic testsInputmonitoringUserEQDelaytDynamicsCoil temp.t°Power supplyInformationon headroom,temperature,power, mainsvoltageExcursion1/23/45from / to channel AChannel B1/23/45SystemEQ/XOpilot signalsfor loadmonitoringChannel ALC DisplayOutputCh ACh BLink A>BDual channel> LINEARoffD12remoteinterfaceOutputroutinguC> LINEARZ analysis:loadmonitoring,wiring faultdetection1/23/45IFig. 3: D12 Amplifier block diagramD12 Amplifier, Hardware manual (4.4 EN) Page 7 of 28