Linlai 6SN7

Preamp tubes don't run that hot, most of the preamps that run tubes really hot go through tubes quickly.  I can touch the tubes in my preamp and they are just warm.

Sounds great? Enough Volume? Low Heat! Terrific.

Doing research, I checked with McIntosh about their vintage tube preamps. They confirmed: originally the preamp and tuner walnut cases had no top vents, even my mx110z tube tuner/preamp with 17 tubes.

They made matching wood cases for amps with top vents. Eventually they simply used the single top vented case for both preamps and amps, kept matters/stock easier.

jasonbourne52 My Psvane and TungSol tube run very hot only the Linlai are cool to the touch.