I'm looking for a small-ish amp head (15W+) that I can use as a backup amp on gigs. My main amp is a 1963 Fender Concert and I plan on using the cab with the backup amp. Hence, I need an amp head that has a 2ohm output. I could just pack an extra amp, but I can barely fit all of my gear in my Beetle as it is and I doubt I'd have room for even a small combo. An extra amp head, though, I could find room for. Any advice?