>Well, let's be clear: the speakers are just for noodling.Just for noodling. And trying it in a store. And playing with friends (you don't need much to play along an acoustic guitar). Or playing and singing in a room, or next to a campfire.
All of these applications don't require big cabinets; beefing up the speakers to 5W (and adding a bit more bass response) would do a lot for the reface DX.
>Nobody who performs would use the built-in speakers of such a keyboard, not even street performers.
Well, that's exactly my point (though I've yet to see a street performer with a Reface DX, other than myself, that is).
The portable amps I do use with the DX can be easily built into the body (I have the keytar strap, and even duck taping a micro amp to the keyboard gives enough firepower for street performances).
The built-in speakers on 1980s keyboards were much louder.
>- the only exception is the big-ass speakers in digital home pianos, and still those are only for home use.
This is not quite true.
Check out the small amps coming out these days, that make Roland Cube Street look huge in comparison.
Blackstar Fly is a respectable example; there are many others.
There is no good reason why something like that can't come built into the keyboard.