>One thing I've not seen mentioned (so far) is shielding. Would it be
>necessary to put shielding inside the cabinet to keep out the barage
>of modern hf gadgets? (Cell phones, etc?) I mean, these waves just
>love a good pn-junction, no?
I don't think it's necessary. Sure you might be able to measure lower
noise if you built your studio inside a Faraday cage, but that would
be overkill.
In my studio I can't use any unshielded wires otherwise I can hear
all kinds of RF hash and any dimmer switches that I haven't already
yanked out (banana jacks are officially banned in my studio). Yet
even switching to balanced lines makes no audible difference with
regards to RF hash. Simply using shielded cables eliminates it
entirely. I've had no need to even consider shielding the insides of
my cabinets.