MOTM

>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.