Here's a 1970's Shure PE548V Unidyne IV dynamic microphone! These were the precursor to the SM7 and were highly regarded at the time of release. This version was the "PE" stage version and therefore came stock high impedance. I bypassed the transformer and volume knob on this one to make it low impedance. At the end of the day, you are getting a transformer-less Shure 548 (the capsule is the same as every other 548 model). Do note that the threads were worn out on this microphone, so a permanent push / release stand adapter was added for ease of use. The prices of 548's have been crazy lately, so this is an opportunity to buy one for a better price. Grab this Shure 548 Unidyne IV today!