TweedyVerb Models are 40 watt. all tube, cathode bias. Unbelievably loud and compact at 16.5x16x7.5 the 12" Combo model can be carried on the airplane at only 27 to 35 pounds! Even in a lightweight road case it comes in under 50 pounds so it can be checked like luggage. The 10" Combo model is even smaller and a separate head version is available  - Killer Blues Tone, Fat and Interesting and the best 2 tube tank Reverb, period. Check out the clips on the Sound Clips page