I’m running a pair of old G2s now with van den Hul Mainsstreams. When I had the single G2 I tried several different power cords. I started out with AQ Tornado source and high current cables as replacements for the free cords that came with the equipment. I ended up trying a Shunyata snake something something, Zavfino Silver Dart and Majestic 2, DH Labs Red whatever, Signal Cables, and Acoustic Zen, the middle one not the Gargantua. The power through the vdHs gives me deeper, cleaner bass than all the others. Signal Cables were second. Majestic 2 worked better than Silver Dart. Acoustic Zen, Silver Dart, Shunyata, and DH Labs all bordered on useless. Yes, I moved them around and gave them all a good listen.
Special mention to Acoustic Zen for ignoring my requests for a return.