what's a good Rumble for a medium sized coffee shop?
Hey, Zooty! Aw rooty! Welcome.


You oughta know that's not enough info to narrow it down. Depending on your definition of "medium sized", other instruments (if any), audience size (and demeanor), desired SPL, and room acoustics it would be possible for you to use the Rumble 15, 25, 40, 100, 200, 500
or 800s!
See
our Rumble Summary Info chart to compare physicalities of the different models, keeping in mind that the 200, 500 & 800s need extension cabs to reach full nameplate power. And, if you're interested in a low-power combo, check the link immediately under the chart for
feature comparisons of the 15, 25 & 40. The larger Rumbles mostly have the same features as the 40, except for the LT25, Studio 40 & Stage 800 modeling combos with much, much more.
That said, I get more use from my Rumble Studio 40 for my Americana (Country/Bluegrass/Cajun) jams and gigs in "medium" venues, than my R500c for my loud Country cover band.
D'oh! 
I see my friend Souly already summed it up quite well, and more concisely than I did!
.