Just wanted to mention that some amps have VERY high damping factor. This means adding even a few mΩ between the speaker (or test load) will significantly decrease damping factor. If your scheme is inherently lower resistance, and I suspect it is, you're on to something.
FYI, I just took some measurements of various binding posts that I have in stock. Some I won't name, but most I will.
Vampire's best .23 ohms.
Eachman Copper .65 ohms.
Some cheesy looking Copper binding posts from something .29 ohms.
Some imported binding posts from EP .23 ohms.
CMC pure Copper .17 ohms.
Some pure Silver coated Copper binding posts .17 ohms.
And this was measuring the binding post only from end to end. They can also have some solder come into play plus the resistance of the spade or banana plug that will increase that quite a bit.
I inserted a male tube connector into the female end and measured them both together and got .15 ohms. Both ends can take up to 10 gauge wire that will insert all the way to each other (almost) so that could reduce resistance further.
I then measured just my alligator clip ends connected together so I was measuring my measuring cables, and also got .15 ohms.
So yes, the tube connectors measure very low resistance.
Oh yeah, imagine the cumulative effect of binding posts in the signal path with several in the signal path.