Having a pair on hand, as well as some 15 Ohm Mills, I've been listening all evening with and w/o. They still have a sound signature too different from the horns but the shunt resistor does change the character enough too enjoy the extra air and sparkle they bring. I had done this back last winter w/o the shunt and that didn't work at all. I'm going to try the varnish over the weekend. I'd have to say that were I building the 2Pi right now I would definitely find a shunt value that worked in my room and never look back. Creating is more like performing than listening