Ok, but this does not match my reality/experience with cables.
Look @ my listed cables (26G solid core copper in single +/- 12' runs with inches between them (+/-).
How many of my 26G wires would be required to achieve 12G?
@ least a couple dozen - right?
I've used these cables with normal speakers (meaning 2 & 3 way speakers) without any noticable loss in the lows/highs.
However, once when experimenting I tried 30' single runs to Reynaud Twins MkII's and did notice a slight attenation of the HF's using an Audio Silver Night DH/SET 300B amp as well as with a Musical Fidelity X-A1 amp.
I also ran 12' runs to Magnapan SMGA's with both a Pilot 232 PP El84 amp and a Carver 130 reciever (sounded great and this is with single +/- runs of 26G solid core cable).
When I had the Audion/Reynaud system up and running Two members of A'Gon who visited thought I had a hidden sub in the room (both used large/expensive full-range speakers).
Not a fan of Jeff Day, but then he's not always wrong.
How about listing your system in order that I/we can get a grip on where you are coming from?
DeKay