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Also, I am hearing a lot about getting a full-range amp (keyboard or pa) and that is fine and I will do it. However, I am wondering how I can plan an "upgrade" and "scale up" path. So, get 1 amp now (whatever size) then use that for rehearsals and Biab play-through for missing backing parts. Then, add another one (of the same size and type) to scale-up for a bigger sound and prepare for a small club.






based on what you're saying here, I would recommend a keyboard amp with a line out jack. The jack will let you send output to the PA if you need to scale up. And by buying an amp instead of a PA, you won't be paying to amplify the whole band.


It's hard to recommend wattage without knowing more, but I think you'll find a lot of options in the 50 to 100 watt range. That should be plenty loud enough for practice and small to medium sized gigs. If you go larger with a PA, the amps wattage won't matter if the PA is loud enough for the venue.

Jazz doesn't tend to be as overpowering as rock, so 100 watts might be overkill for jazz keyboard, but it would give you plenty of headroom. Jazzmammal plays jazz keyboard, so his recommendation should be golden.