Excuse me if this is the wrong area for this; I'm a rookie. I have a friend whose deaf (not totally, some hearing in the very low range) 14 yr old son wants to play bass. Does anyone out there have any experience teaching bass to someone with no or very limited hearing? I've been advised, and considered, sitting on the speaker, EA's rumble seat, etc, so I'm looking for actual experience(s), but any help is greatly appreciated. Thanks!