The SL3 has no active component inside (no amp). There is absolutely no benefit to change out the stock cable. Don't waste money on that.Hmmmmm. I run Sound Labs A1 full-range speakers and thus they also do not have a built-in amp. But after addressing the rest of my system with cabling, changing power cords on these speakers started to make some serious differences.
I have had great success with Dream State (DS) power cords but unlike the Dream Catcher and Veridical models, the Lucid model just never worked well with any of the electronics in my system. However, when I ultimately tried a pair of Lucid power cords on the Sound Labs, I was mightily impressed with the added clarity and added bass weight, with no change to tonal coherency. This was compared to stock power cords. The other DS cables did not do as well here. Other available power cords from Electraglide and Stealth were minimally effective with a change. You just never know until you try.