We like the RCA BA-71/72 series so much we decided t try to make them as affordable as possible without scrimping on features. Of course, going with single channel units was the answer.Here's a restored BA-71C with all available options including adjustable meter, variable source impedance, active FET DI that runs through all the UTC iron, as well as 6dB boost, 20dB pad, polarity, and +48V switches. The BA-71/72 series are absolutely gorgeous sounding preamps. The engineers at RCA sure knew what they were doing: sweet, airy highs, lovely balanced mids, and smooth yummy lows make them my personal favorites. Yes I will wire them 220V at no extra charge. The item "Racked, Restored Solo RCA BA-71C Mic-Preamp" is in sale since Monday, April 15, 2019. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "tgruning" and is located in Middleburgh, New York. This item can be shipped worldwide.