The M40fs headphones are great. The M40x headphones that replaced them are terrible. I love the M40fs headphones so much I bought 10 from eBay when I learned t

The M40fs headphones are great. The M40x headphones that replaced them are terrible. I love the M40fs headphones so much I bought 10 from eBay when I learned they'd been discontinued. Should be a lifetime supply, I hope.