AMEK 9098 DMA Microphone Preamp for sale. Regarding operation, the power turns on and there is no crackling. Both CH1 and CH2 are working. Detailed measurements have not been performed. Also, there are screw marks and scratches from mounting. As this is vintage equipment, please understand that there may be some crackling. It is a foreign specification, so it can be used with 100V to 115V. Accessories include the instruction manual and power cable. Please consider it if you need it. neve mic pre Amek outboard