I kid you not, Wayne, the cap and resistor upgrade has taken these speakers to a whole new level. Do you remember my story about the Magnepan 1.6's? At a Houston Audio Society meeting we played my upgraded 1.6's side by side in an A/B comparison with another member's non-modded pair (with the stock Solen caps). The unanimous conclusion was that the modded speakers (also using Northcreek caps and resistors) were so much smoother and more detailed they didn't even sound like the same speaker. Ditto for the 3 Pi's. I had been using a Fountek ribbon as a supertweeter, but with the upgrade to the Eminence tweeter crossover the Fountek adds nothing; in fact, it actually detracts a bit.