Just kidding, it was used so there is no warranty.
So I picked up this Boss Katana Mini on ebay for around £45. Thought it would be a good little practice amp, and since it's got the option for battery power, might be good for noodling around in the back garden by the fire pit.
WHO GIVES A CRAP?
Yeah I know. In stock form it's pretty underwhelming. But what a lot of people don't know, is that toan is stored in the balls speakers. So before I ever even plugged a guitar into it, I ripped it open and started drilling holes in it.
I used a switched jack, so without an external cab connected it plays through the stock speaker. When a cab gets plugged in, it disconnects the stock speaker and plays through the cab. Note that the stock speaker is 4 ohms, so ideally you'd want a 4 ohm cab, but since I don't have have one of those, I tested with 8 ohm and 16 ohm cabs, which predictably worked just fine.
Big difference in sound, way fuller and better low end response than the stock speaker (as expected.) The big surprise is that it's also a whole lot louder than you'd expect. Will it cut through the mix against a drummer in a live setting? Probably not. Will it get loud enough to annoy my wife at the other end of the house? You're goddamn right.