API 3124+ 4 Channel Mic Preamp. Used in a smoke free commercial studio. Pre owned in very good condition! The item "API 3124+ 4 Channel Mic Preamp" is in sale since Saturday, November 9, 2019. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips".The seller is "bilcus69" and is located in Burbank, California. This item can be shipped to United States.