B&K 2804 Battery Driven Microphone Powersupply
This versatile battery powered Microphone supply can be used with a number of different B&K and GRAS microphone premamps like BK2639, 2619 and also newer types like BK2669 or GRAS26AK can be used with this supply-unit. To enhance operation time the heating element of microphone-preamps is not powered from the unit.
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