Double/diff. speakercable runs in singlewire conf.

As it says:

Double down

There is one easy “tweak” of the speaker which will improve performance holistically, a tweak I have done with many speakers having only one set of inputs. After using this method on several occasions with clearly superior results I now invariably double the sets of speaker cables. Just as has every other such speaker, the Ulysses perked up in a very satisfying manner, including the treble, when I did so. I strongly suggest that the prospective owner of the Ulysses procure two sets of speaker cables of their choice. I am fully aware of the existence of bi-wire sets, but these often have compromises in the total gauge as compared to two individual sets. Note well the need to get one set with spades at the speaker end and the other with bananas! You likely will not be able to attach twin sets of spades to the Ulysses’ posts.

When it comes to such methods I have no interest in arguing over electrical theory; doubling speaker cables works, and works wonderfully. My guess is that the primary benefit is in the increased total gauge, a variable I believe is primary to the attainment of superior sound. Very simply put, the more metal, the more musical nuance and grace – something which the Ulysses showcases. Perhaps at some point a magical thread of a speaker cable will force me to rescind that declaration, but having tried many skinny wires up to this point and all of them failing I’m not holding my breath for it. Regardless, if you have your favorite speaker cable and double it up you will, I can almost absolutely assure you, hear a lot more of what you like. When I did so the Ulysses gave me a lot more of what I like, more simmer!

I'm now trying out a different variation of the above - albeit with different single-wire coupled speakers, but no matter - namely with two different, parallel sets of speaker cable runs in single-wire configuration, and it works splendidly.

My existing speaker cables are Mundorf's teflon insulated 1.5mm Silver/gold wires(solid core), and they're now parallel-"doubled" with DIY Mundorf AWG 14(0.075 x 28mm = 2.1qmm) copper foils. Both sets of cables have their individual strengths, but (to my ears) compliment each other even better.

I've rarely read about double speaker cable runs in single-wire configuration, much less where different sets of cables have been used, so I'd like to hear from others here at Audiogon who have first-hand experience with this.
Shotgun configuration: true internal bi-wire or internal shotgun - you have two pair of cables and all you do is connect the two ends together to form one set of two; so you have 2 spades to 2 spades (you put the 2 pairs of cable in one run so it works and looks like a single cable.)

CHORD is migrating away from 2 to 4 bi-wiring in favour of single runs with jumpers:

Ditto for NORDOST

I have shotgunned NORDOST FREYs with matched shotgunned jumpers: sensational!
A thought-provoking post worth consideration and testing, especially if this approach is affordable.