"The 546 was a "high-end" version of a 545 that used a capsule selected for consistency. The SM56 and SM57 were originally sold as being non-reflective 546s. There was also a gold colored 546." - Bob Olhsson (from Gearslutz) Crimson Audio SM57 and SM58 Mods Shure Unidyne III SM57 Search: Reverb ZenPro modded SM58…
