Hi zincman, It is nice to see that Ron helped you break into the high efficiency and vacuum tube audio world. Ron is a first class person, willing to help anyone who is intersted in audio and music, something he enjoys. I got some Philips AD5200M full range drivers from him, and they sound great in an open baffle and without crossovers, thanks Ron. Also, I know you will have many years of enjoyment now that Ron has helped you to get hooked into the world of audio neurosis, Welcome. Norris Wilson