Don't totally enclose the sides.    It needs to breathe naturally to stay cool.     Only running minimum voltage, 24vdc and won't hurt you.     If you want to enclose it be sure to leave plenty of vent holes.     Believe it or not, these little dudes sound great.     They are not the most...

I have a LD II with the 1K2 drivers.    Do you know whether these driver tubes should glow or get warm?   The amp seems to work well, runs very hot, but the drivers do not get warm at all.    The power tubes run very hot as they should and the entire case also.     If the drivers weren't working...