Grado Labs was late to the wireless game. The company knows it, and it has good reasons for not jumping in sooner.

“Wireless technology has never been very good, so just like closed-back, we could make them, but people would expect them to sound like our wired headphones,” John Grado told me in 2017. “And they won’t.”
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https://www.engadget.com/2019/03/20/grado-labs-gw100-wireless-headphones-review/