Stacking power amps mono blocks

Abstract, would you please explain? What do you mean by "routed and sandwitched with marbles"? I am thinking of using aluminium tubes of about 2.5 inches for the same purpose. Please enlighten..thanks

I agree that stacking the amps is NOT a good idea in terms of heat dissipation. If the amps are high bias designs, i would recommend appr 8" of free space above them. This lets the heat rise out of them unimpeded. In your case, not only is heat trapped in the bottom amp, what does rise out is only helping to cook the top amp. NOT a good thing in any aspect.

Unfortunately, I can't offer any good suggestions. I was also in that boat but ended up changing racks for similar reasons. Since all of my amps ( except two ) are all very richly biased and run hot, i didn't want then cooking to death. As such, i hated loosing a shelf or having a giant "dead space". To correct this situation, i ended up changing racks. I can now adjust the shelf height on several of my racks. This now gives me the ability to accomodate ANY situation or component AND the looks that i was searching for. Sean
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Detlof: I routed the aluminum plates, just two routes per plate. They are about 3/8" wide and almost as long as the plate, stopping about 1 inch from either end (long being side to side in this case--if that makes sense). Then you have one with the grooves on the top, put two marbles near the ends of each groove, then put the other aluminum plate with grooves downward onto the four marbles. That's my recipe for my aluminum marble sandwitch. As to the concerns of heat dissappation--these concerns are probably correct for tubes or other types of amplifiers which do not have the heat sinks located to the outsides as mine do. Also, the ambiant tempurature and air flow around the units play a significant role. My units are only about 2" separated, which is adequate, although I have been considering increasing the flow under the bottom amplifier. In this situation it's really how much airflow you can get around the heat sinks--how much heat dissapation per hour. With tubes, this is probably much more difficult to accomplish since the heat generating device is located centrally in the amplifier--rather than on the external sides with massive heat sinks. I should have considered this with my original post.

Thank you. I am starting to get convinced. Need to run to look for amp-stands for my mono blocks.
Cheers.

Thanks for your time and consideration Abstract7. You make very good sense to me. I 'm thinking of following your footsteps and doing something similar.
Regards,