I owned two pairs of Manger drivers (black with the Neodymium) magnets, but getting get around to building the cabinets for them. so, I am now selling my Manger drivers (cheap) on Audiogon (also Videogon) as of 11 Jan 2005.
I tested a pair a few years ago and was very impressed by the measured flat frequency and impulse response.
Perhaps the Mangers go unappreciated by most audiophiles?