Just one 15, i got another on sittin here next to me, for my second hairtrick.hah
Mine does heat up some, after playing full tilt for a while, but never hot hot. But I think thats what its suppose to do, the cone is like a heatsink for it. Thats wat the Audiopulse site says about it.
Ive got a temp gun somewhere. ill have to see what temp it gets up to.