Ok, goto a larger, better cable, inside. What’s the difference?
Every manufacture worth his/her/their salt offers internal wire, cap, inductor, resistor, upgrades. Is it worth it to you? For them to do it, or you to do it? I’ve seen the insides of a lot of speakers, LOTS, and LOT.
You would be amazed at the crap that goes on INSIDE where you can’t see. Seldom are wired secured, seldom. Might be in one place, but not in another. Or bundled together, worse yet... Just floppin in the wind....I secure, and separate wires.
Now, a larger, better cable to the speaker? Is there any difference?
BIGGER is not better by any means. Not big enough is a real problem, though. BETTER quality, different concoctions, length, covers, terminal ends, armor, breakin, and routing, (the most important thing) for noise reduction. YES, all can make a BIG difference, to a point.
Night and day difference? Only in your head and if the cables you were running were that "BAD" to begin with. Like bad zip cord or something, not ZIP CORD, BAD zip cord, chewed on by rats or something.
You're not gonna turn a 50 year old Radio Shack Nova 6 speaker into a Magico G5 with a cable upgrade, ok...
Regards