I played bass in bands for over six years, back in the '60's...six to seven nights a week. Bare in mind, I was playing with a 60 watt tube amp, through a 2 x 15" cabinet. My guitarist(s) didn't have stacks, they had one or two speaker combo amps. The organist had a Hammond B15 with Leslie speaker and the drummer(s) were, at times, heavy handed. I always stood to the right of the drummer. Some nights, I would try to sleep, but the ringing in my ears kept me awake. When I was in my 40's, people mumbled and I couldn't understand why people watched TV if they couldn't hear it. I turned up the TV in my apartment and the neighbors complained. My wife said, "maybe you should get your hearing checked". I did and my left ear was the worst, so I got one hearing aid. Several years later, I am back to the same problem. This time I get new right and left hearing aids. Great for another few years. I recently went through my old check books and found that I have had to buy new, digital hearing aids every 4 to 5 years at a cost of $4K each time. My hearing progressively got worse to the point that it is now classed as "Profound". Hearing aids are like computers and smart phones...they are built to last 4 to 5 years. So, my fellow members with 500 and 800 watt amps, if you do not protect your hearing, you can count on paying over $1K per year for the rest of your life or, until the hearing aid manufacturers can no longer sell you hearing aids that are powerful enough. In that case, you will live in a very silent world...your choice.