The first thing I noticed about the Tone Tubby was that it doesn't have much high end. Using the same amp settings, it was like throwing a blanket over an EVM. But after adjusting the amp to put out more highs, I was able to get an excellent tone for rock, blues and Hawaiian. It's still not as bright and twangy as I would want if I played mostly Nashville-style country, though.
The Tone Tubby would not be a good choice for high-powered, solid state amps. It's conservatively rated at 25-30 watts, and it works very well in my 40 watt amp. I think you'd blow it out pretty quickly if you plugged a Webb or a Session 400 into it.
The Tone Tubby is light! I put the EVM in a separate cabinet (I'll use both for larger gigs) and was surprised to find that that EVM cabinet weighed more than the Boogie with the Tone Tubby in it. I didn't put them on a scale or anything, but I could feel the difference. The change really lightened up the Boogie.
The low end from the Tone Tubby is wonderful! I've never had such rich bass tones from such a small amp before. I haven't played a C6th through it, but I often hit a low D on my extended E9th and it handled that easily. Also, I've been using a RotoSphere Leslie emulator that really pushes the low end, and it sounded just gorgeous.
Because of the roll-off in the high end, the Tone Tubby smooths out rock distortion tones very nicely. Rock heavyweights like Clapton and Santana are using Tone Tubbies, but it was the endorsement of tone fanatic Steve Kimock that made me want to try it. The speaker really "sings" when you pump blues tones into it. It takes the fuzzy edge off of the distortion.
It's an expensive little speaker. I was pretty hesitant to plop down 2 bills for a dinky 25-watt speaker. Luckily, I was able to borrow one first to try it. I now think it's worth the money. It performs much better than I expected, giving me sounds I could never quite reach with my trusty old EVM.
Hemp cones. Who'da thunk it?

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<small><img align=right src="http://b0b.com/b0b.gif" width="64" height="64">Bobby Lee - email: quasar@b0b.com - gigs - CDs
Sierra Session 12 (E9), Williams 400X (Emaj9, D6), Sierra Olympic 12 (F Diatonic), Sierra Laptop 8 (D13), Fender Stringmaster (E13, A6), Roland Handsonic<FONT SIZE=1 COLOR="#8e236b"><p align=CENTER>[This message was edited by Bobby Lee on 25 November 2002 at 10:39 AM.]</p></FONT>
The only reason I'm not currently using one is that I'm using all rack mount gear and I have plenty of organ patches for my IVL MIDI rig. 