 MAYFIELD HEIGHTS, Ohio--BUSINESS WIRE--Materion Corporation NYSE: MTRN and California-based Radian Audio have announced that they will partner together to manufacture Truextent premium acoustic beryllium diaphragms used in high-end loudspeakers for both the pro audio and home audiophile markets. Materion has produced Truextent acoustic beryllium speaker domes, cones and diaphragms for more than 20 years, supplying high-end speaker makers around the globe. Recognized around the world by OEM 