I do not believe a half inch is enough space. Not only should you be concerned about the lower unit, but also the tube amp above, so much heat in a tight space is probably not good for either of them. I would take ed's advice and buy a couple of amp stands. If you do get the stands, take a look at a thread here on agon about spk cable verses interconnect lengths, I don't personnally have any experience on cable lengths but the people who commented on the thread made some interesting comments. I would try both ways short interconnect and then long inter, with spk cables going short and then long. You may end up achieving a new level of performance. Good luck and let those amps breath. Pete
Stacking power amps mono blocks
I have two tube mono blocks that are stackable. However when I put one on the other there is only 1/2" space for heat dissiation between the two of them. I am worried that the lower unit will fry over time if it gets to warm and the heat from the tubes can't escape. I can obviously put a 2" x 4" to create space. However, the look may not be great. Anyone that has figured out a nifty thing or purchased something that creates a nice 3 to 4 " gap between two pretty heavy (at least 50 lbs each) power amps. By the way if I put them into my Target stand (the ampsare 8 " tall (mono blocks) I need to remove one shelf and loose three shelves and not great look for putting in two amps. I am I just not getting it?