Those of you familiar with Gruning Audioworks know that the RCA BA-71/72 series are my favorites. In my opinion, everything that goes into them comes out better for the experience. I've used them on many, many sources and have never been disappointed. They are particularly yummy on vocals. This particular pair has all the bells and whistles: polarity, 20dB pad, 6dB boost, and +48V phantom power switches; source impedance variable from 37.5 ohm to 150 and 600 ohm; active DI on channel one; output pots; meters and adjustable stereo meter buffer; rear ground lift switch; and, of course, the vintage RCA meatball.
Yes, I can wire these 220V at no extra charge if you prefer. The item "Racked pair of vintage RCA BA-71B preamps" is in sale since Thursday, December 07, 2017.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.