What headphones have the loudest max volume and separate control for each ear?

I have high frequency hearing loss and is it different in each ear. When I am using my AT Gold I don't want to use my hearing aides as the heat and humidity and sweat here in Houston will ruin them. I have the standard Garrett headphones and Jolly Rogers, both have about the same max volume and am hoping there is something out there stronger or, headphones that would accentuate the high tones, that is what I am having trouble hearing.