Spacing from output banana jacks/binding posts is about 3-4 inches.
I have some good, cheap, teflon-coated shielded wiring I'm thinking of using here. Does it matter? I use shielded speaker cables, why wouldn't it?
So my question is, do BOTH ends of the shield connect? One end to post, other to OPT then to ground (through the 47k, 47uF part of the circuit) or just ONE end, like shielding an AC power cable?
I'm thinking ANY extra shielding I can add to this might be of benefit. With my Willsenton R8 and Tektron TK2 2A3/50S-I amp, if I'm within a few feet of EITHER amp with a cell phone I get some interesting noise out of my speakers. All KINDS of signals coming off cell phone, and LED lights, and blue tooth, and 2.4/5gHz wifi, all the cell phone bands, local ham radio guy next door, all the rest.