Avalon Audio AD2022 2ch Microphone Preamp w/B2t PSU. The item "Avalon Audio AD2022 2ch Microphone Preamp withPSU" is in sale since Thursday, July 22, 2021. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "aarpaul" and is located in Burbank, California. This item can be shipped to United States.