tube amp placement in audio rack

aKnyght

aKnyght

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for an audio rack that is open on all sides [front, back + both sides] what would be the desired distance between the top of a tube amp and the bottom of the shelf above it -- or is it not recommended to put a tube amp anywhere but the top shelf?

the shelving material is 2" thick wood.

in my case, the top of the amp is 8.0" with tubes. the output tubes are two 6c33c-b which do put out a decent amount of heat... so, would a shelf with 12.0" or 12.5" inches of total space giving the amp ~4" of space above it be too little? how about 10.0" or 10.5"?

i would think with all sides open there would be plenty of air convection to dissipate the heat?

thanks!!!
 
ARC wants 7”-8” from the top of the Ref 3 phono to the bottom of the shelf above it. I wouldn’t put a tube amp in a rack personally. Buy an amp stand and put your amp on it between your speakers.
 
aKnyght said:
for an audio rack that is open on all sides [front, back + both sides] what would be the desired distance between the top of a tube amp and the bottom of the shelf above it -- or is it not recommended to put a tube amp anywhere but the top shelf?

the shelving material is 2" thick wood.

in my case, the top of the amp is 8.0" with tubes. the output tubes are two 6c33c-b which do put out a decent amount of heat... so, would a shelf with 12.0" or 12.5" inches of total space giving the amp ~4" of space above it be too little? how about 10.0" or 10.5"?

i would think with all sides open there would be plenty of air convection to dissipate the heat?

thanks!!!
Click to expand...

4" should be fine. I'm running my Conrad-Johnson LP70S with KT-120s (which prevent the tube cages from being used) in my rack with about 4" from the shelf above it, and I've had no problems with cooling whatsoever.
 
thanks for all the help!! just doing some homework on component placement to make room on the top shelf for a possible new addition.

a 4" clearance should be fine -- holding my hand at 4" above the tubes it was somewhat warm but the heat had dissipated pretty well... at 2" above the tubes i could have kept it there all day but it was pretty warm.

amp stand would probably be ideal but the amp is an integrated which would result in cable chaos.
 
aKnyght said:
...a 4" clearance should be fine -- holding my hand at 4" above the tubes it was somewhat warm but the heat had dissipated pretty well... at 2" above the tubes i could have kept it there all day but it was pretty warm.
Click to expand...

just to test this out, i used some scrap wood to mock up a shelf enclosure open in all sides...

while the heat from the tubes at any moment is not all that great, over a period of time the bottom of the shelf 4" above the amp tubes does get quite warm. so, while I think the amp would be perfectly fine the accumulated heat on the rack shelf above is probably not advisable... looks like an amp stand or top shelf placement is the best choice here.

thanks again for the all help here.
 
Thank you for the update.

I always error on the side of too much ventilation, especially for tube gear. Heat kills components and now I’m even using AC Infinity T9 component coolers. Depending on amp, top of bottom placement works great.
 
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I had a Mcintosh MC2000 on the bottom of a rack once. Added a small fan and the rack stayed cold to the touch. With the plethora of USB fans around today, even a tiny silent one can easily move enough air for it not to be a concern. Just remember to turn it on when you turn on your amp.
 
Mine is 5 inches from the top, enclosed on the left and right, with an open back. Gets warm but is fine. I tried the top of the cabinet, but the cats got curious...
 
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