As in does the cone/driver wear or degrade slightly to produce any audibly different tone. I'm just curious, my M60Ti's and company are now 8 years old and used almost daily, but I can't say I notice any difference at all since the day I unpacked them. Just curious.

M60, VP150, QS8, HSU VTF2-MK 3, Marantz SR8002, Oppo BDP-83SE, 50" Panasonic Plasma