GML 8304 transformerless microphone preamp. The item "GML 8304 transformerless 4 channel microphone preamp" is in sale since Monday, March 29, 2021. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "uppereastsmile" and is located in Las Vegas, Nevada. This item can be shipped to United States.