What a coincidence
I tried the method just yesterday and results were amazing. But only thing is that I got best results when I doubled ICs from pre to power , DAC to pre and doubling of speaker cables
But I have a unity gain pre so best to read the article properly and then proceed
Audioquest RCA splitters are what I got when searching for them from a reputed brand , so anyone wanted to try this method should grab the ones on sale
By the way , using some no name cheap RCA splitters actually ruined the sound, so a good quality connector is surely important