I lost mine years ago somewhere in a 40,000 watt P.A. stack at Hammersmith Odeon watching MotΓΆrhead whilst out of my head on some illicit substance or another.....
3 days later when my ears stopped ringing - I realised that where there was once bass - there was virtually none.
Gone for ever through a moment of stupidity.
Hence the 600 watt amp and twin subs in the car - I at least have bass I can FEEL even if I can't hear it.