I have a rather good 1968 Yairi classical, but don't play it very often and usually to accompany Leonard Cohen or Peter, Paul and Mary songs.

Al Stewart used to play classical in the old Bunjies days and I've often wondered if he played any of the lead classical breaks on the "Year of the Cat" album.

As has been said, numerous technical efforts have been made to improve the volume of the nylon-strung guitar over the years, but I personally reckon it has more to do with the technique of the player than the technicalities of the instrument. I once saw John Williams fill the Albert Hall with the sound of his classical guitar with no apparent amplification.

Alan