Audio Technica BP40 Large-Diaphragm Dynamic Broadcast Microphone. The BP40 broadcast vocal microphone offers a rich, natural, condenser-like sound from a large-diaphragm dynamic design.The large diaphragm features patented floating-edge construction that maximizes diaphragm surface area and optimizes overall diaphragm performance, while the humbucking voice coil prevents electromagnetic interference (EMI). You will receive occasional emails regarding special insider product deals and industry news. The item "Audio-Technica BP40 Large-Diaphragm Dynamic Broadcast Microphone" is in sale since Friday, October 28, 2016. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Microphones & Wireless Systems". The seller is "geartree" and is located in Jenison, Michigan. This item can be shipped worldwide.