Out of curiosity and if it’s not too personal, how extreme did you go with your jumpers?
@immatthewj Another great question. So, the person who recommended I try this was Chris Sommovigo (RIP) from Illuminati, Stereovox, Black Cat, etc. when I was reviewing some of his interconnects and speaker cables. In an offhand comment he mentioned I should try his jumpers with my Acoustic Zen Shotgun Bi-wire cables. I said, uh, what??? He was adamant so he sent some thin banana jumpers (i.e. nothing like my garden hose cables) and I was beyond skeptical, but as soon as I plugged them in the improvement was immediate and undeniable and they haven’t left my system since. I say this because I’m not sure it matters so much which cables you use for jumpers, and at least in my case they didn’t have to match my speaker cables to make a significant improvement — and the price of the jumpers Chris sent were WAY less expensive than if I bought AZ jumpers. I think you can get very good banana jumpers that are reasonably priced from Audioquest from Audio Advisor, Crutchfield, etc. and they may be more than fine and can probably be returned if not. That’s prolly what I’d do. Highly recommended to at least try. Maybe just try these as they’d work with your mix of banana and spade connectors and give you an idea at very low cost…
https://www.crutchfield.com/p_703PSCBIWR/AudioQuest-PSC-BiWire-Jumpers.html
As for the question of the zip ties with your cables, unfortunately I got nuthin’. I’d think it could work depending on how well your cables are shielded, but obviously you could try it both ways. Personally, I’d have bigger fish to fry rather than worry so much about that, especially if your cables are well shielded. But that’s just a non-educated guess.