The Ares doesn’t top out at 64dB gain. You can replace the 12au7 with 12at7 and get around a 5 - 7dB boost in gain. If you upgrade to the Blue CineMag 1254 (very worthwhile sonic upgrade over the mediocre stock Red 3440) you get another 6dB gain to boot. Rogue includes the 1254 in the magnum upgrades, but they might still do just the 1254 upgrade for half the magnum cost (it yields the biggest improvement). As far as SUT based stages go, the Ares is about as adjustable as they come.