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Remote volume control board, using relay (Halcro also use relay on their DA10 pre amp) switching two set of 1/4W RA resistor(R-2R ladder network). 1dB per step, attenuate from 0dB to -99dB, output impedance is near constant, using 1/4W RA resistors. Left and Right channel are total separated to minimize the cross talk interfere
Each set include two pieces of 1/4W RA R-2R ladder and input relay board one piece of display board one piece of power regulator board one remote handset
main pcb size: L 180mmX W 45mm dsiplay board: L 230mm X W 52mm
Highly recommend

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| mounting hardware for V-03 and V: |
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| power transform: |
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