By an amazing coincidence, I just bought one yesterday. I went in to the Rickenbacker dealer here on Saturday, to look at a 330, and they had a TR-14 in the used equipment section. I was on my motorcycle, so couldn't get it then; went back Sunday and snagged it. Don't have a lot of experience with guiter amps (primarily a bass player); I use a little Gretsch Electromatic when I do play a guiter. Plugged a very inexpensive Tele-clone into the TR-14; compared to the Electromatic, the thing was transformed. I had no idea that guitar could sound so good. Wonder what a 330 would sound like...
