GNP loudspeakers?

I know there was a company in Pasadena started by Bill Gross and they produced loudspeakers. Is anyone familiar with these and/or the original design? Information please.
What do you want to know about which model? I auditioned the original Lead Cylinder (a Bill Gross design) and acquired a pair of Valkyries (designed by Brooks Berdan) earlier this year for my bedroom home theatre.