HiFi Diy ARC Audio Preamp Tube Full Balance Preamplificatore Board Kit (senza tappi)

ARC balance preamplifier board kit x 1. HiFi audio resistors components. Preamp board size：160x230mm. Not included capacitance，RCA ，XLR socket and tube ！ pcb is yellow now ！！. Audio switch board size：70x230mm.

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