Earpads on PRO4AAA are different from all the others, don't let anyone convince you otherwise! The side that goes toward the front is less rounded. Koss has the replacement cushions in stock. I got a set by emailing the company customer service. As of June 2014 the pair of them cost $5.00 and...

I am not claiming the 40mS on the Bluedio but it is there on the description at the Amazon website. I was not concerned about phone, I wanted a set with low latency for watching TV. Have Koss PRO4AAA wired but too much cord and wanted the great sound without the delay. Is even 40mS acceptable or...

"Bluedio H" bluetooth headphones claim a latency of 40mS sold at Amazon for around $35.00