Well... not to be contrary, but their sound did change in the first hour of wearing them. Straight out of the box they were closed in, muted and muffled. After a while they opened up a bit and brightened slightly. They are now out of my ears and burning-in over night for a test ride (literally) in the morning. I'm hopeful... If they don't open and brighten more... look for them in the For Sale forum.