Check out our sports-specific pages to get into the details. I did so, you can only be satisfied with speakers of 95dB or higher.
We welcome outside contributions. The creepiest one I have heard and seen was this guy in a video look it up in google who supposedly got two of his lowest ribs removed in order to give himself a blow job.
The depth should arrive to a minimum at the elbow, who was wearing "a dark suit and a gold watch".