Love my QC25s, they're one of my favorite tech purchases ever. I prefer the sound to my Etymotics and AKG K270S. Can't believe I put off buying them for so lo

Love my QC25s, they're one of my favorite tech purchases ever. I prefer the sound to my Etymotics and AKG K270S. Can't believe I put off buying them for so long, I wear them everywhere, even working at home at midnight. I wonder if Bose is doing something beyond noise-cancellation in the QC25s when you turn them on. It sounds similar to a BBE Sonic Maximizer, as if they've licensed the algorithm and tweaked it to the characteristics of the drivers in the QC25s (which sound lousy when the headphones are turned off).