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142.76.1.63
In Reply to: RE: Question about tube clearance in shelves posted by NuWave on January 18, 2017 at 20:50:08
Good Morning, Nuwave:
Three other things you can try aside form what's already been suggested.
1. Being that it looks like the top two shelves have some adjustability you can try moving the shelves lower and place the amp on the top shelf and the Meridian & Marantz on the lower two shelves instead as this may provide more room for ventilation.
2. Drill two holes in the insides of each of the vertical sides of the cabinet of the same size and depth (like the ones already there) to allow the shelf with the Marantz and the Meridian to be adjusted upwards (even though the clearance above these two components would be lessened. Hoepfully these two components do not need as much ventilation space to operate without overheating?
3. Replace the shelf with the Marantz with thinner shelf?
Sincerely,
Kingsley.
Follow Ups:
I already moved the shelves to be able to fit three components, with the most room being over the amp. The amp is on the bottom because it's almost 33 lbs. The clearance at the top is what I am more concerned with if I add the tube phono stage, or maybe even a tube pre down the road.
One last suggestion, Nuwave, but I don't know if you're willing to try.
1. Disconnect the Meridian Pre, move the Marantz to the top shelf, removed the middle shelf, and place the Meridian vertical-wise either to the left or to the right of the amp, and reconnect everything. I know it's not the most aesthetically pleasing sight but at least that will provide ample ventilation above the amp and warm/hot air rises and still allow the Meridian Pre to breath. (Plus you can use shorter interconnects between the Meridian and the Audio Research amp.)
Sincerely,
Kingsley.
12AX7s produce very little heat. Top shelf is fine for that phono amp.
I strongly agree with Sony6060's statement that 12AX7s do not dissipate enough heat to worry about. This the case with many other typical pre-amp tubes as well barring the big boys some use.
That said, if you decide to use a big tube pre-amp it could get toasty in there. My answer is ditch the rack! At that point, you have become a real tubophile, and need to treat your tubes with care. An audio rack typically has open sides, front and back. Good luck don't stress over the phono stage.
The amp well that's another story.
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