Nice pair of RCA BA-21A tube preamplifiers. These are very highly regarded as one of the best sounding preamps RCA made. These rarely come up for sale, let alone a pair of them. These are vintage items and I have not tested due to the lack of power supply.
These along with other items came from a studio the closed down and everything so far has been working according to my buyers. The item "PAIR OF RARE RCA BA-21A MICROPHONE PREAMPLIFIERS #2 / BA-31A" is in sale since Friday, February 7, 2020. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Vintage Pro Audio Equipment". The seller is "jdmsales" and is located in Savage, Minnesota. This item can be shipped worldwide.