The cord is replaceable which I found to be a great feature when the cords go south.

All cords when break down when you are moving around and the cord is plugged up, with the replaceable cord you don't have to toss or go figure out a repair you just buy another cord and it plugs in and you are back in business.

181's have a little wider range and a replaceable cord, lay flat, quality construction, are a little snug, earpads are removeable and can be replaced.please check out my underground broadcast,