My upright is a Christopher Hybrid 3/4 scale and, when plugged in, I play it through my 1969 Ampeg SB-12 fliptop amp, and I love the warm sound for small jazz venues. I have also played it through my SWR Workingman's 15, but reserve that rig mostly for my electric bass gigs. Now I'm playing a real cross-section of music genre's with my upright, and I'm looking for a small (light) amp that can really compliment the unplugged sound of an acoustic bass and provide more power than my Ampeg (25 watt) can deliver in larger venues. Does anyone have suggestions for / experiences with the smaller size amps? Thank you and I appreciate your feedback.