Oh yeah, how does the EH-150 sound? I think these have a beautiful voice. Very rich and clear. Nothing at all like what one associates small tube amps with: it doesn't distort, rather it sings. I would love to build one but I mean, does anyone make a field coil speaker today? I've yet to meet one I didn't like. They are limited, this isn't an amp I'd use to rage out on, it is one I would use at an acoustic session for low volume situations. That warmth is unbeatable.