On the surface I can understand the enthusiasm of the poster. HP's are pretty neat and you can, again on the surface, see some advantages. No moving parts, no interference, no maintenance, silent, other things as well. Digging deeper and doing some thinking I would propose to the poster that a couple issues exist. First we are really talking about 3 systems here. First there is some component we wish to cool. That basically (thinking CPU model here) conducts to your heat pipe. Within the HP we get transfer driven by the phase change (with some temp delta and gravity to help out). Now though we need to get the heat away from the HP to keep the party going. This is why your laptop nearly always has a fan blowing across the hot side fins attached to the HP. I'm not going to mess with the math as I'm not really that interested, but as I recall the size v. power issues relegate HP's (the pure passive kind, no fans) to fairly low power stuff. In grad school we spent a term only on cooling on electronic systems and I cant recall finding much that the passive HP can handle by itself. Mind I did not look hard but.....? Other question is how this sort of thing affects sound and man I have no intention of even sticking my head in there, I'm still trying to find the audio equivalent of the bathroom.