My Wa7 arrived this morning so I thought I would run a quick temp test while I try it out for the first time.
I am in Adelaide South Australia
The current at the wall is 250v measured
Ambient 26c , running Itunes lossless from a Dell 17r via Wasapi , Audioquest Forrest cable , Hi z volume 50% ,
Ety Er4s via 3.5 jack , glass on
power supply case glass tube
3 min 26c 26c 26c 31c
30min 32c 31c 32c 68c
60min 35c 35c 36c 75c
90min 35c 36c 38c 78c
120min 35c 37c 38c 78c
150min 35c 37c 39c 79c
180min 36c 38c 40c 79c
Power supply measured from the holes on top
Case measured from left side central
Glass measured from front centre
Tube measured top of flash
Hope that gives you something to compare to.
By contrast my LaFigaro 332s is running at 60c on the case after 30min and that's normal.