The most USB A and B can deliver is 0.5A. USB C's rated max is 0.9A.
You'll never power it properly with USB.
Plenty of powerbanks deliver up to 3A through USB ports. I think you are referring to standard USB cables, that's why you need one of those special Birdcord cables to deliver more current.
For those interested in the battery powered option.
Based on the KPP specs you need 9 or 12 volts and 24 watts, center negative. That's
Power / Voltage = Current
24 W / 9 V = 2,67 A
24 W / 12V = 2 A
12V Ripcord won't work because they only provide max 1A
Birdcord PD>12V will work since it provides up to 3A but be careful IT'S CENTER POSITIVE, you need to buy this adapter to reverse the polarity. Also the barrel is not exactly the 2.1mm required size it's 2.5mm inside, it might work but you can get this adapter to make sure is making good contact
You can also use the Birdcord PD>9V it accepts up to 3A so it should be fine with the 2.67A required when using 9V. This one is center negative, no need to reverse the polarity but you would still need the small adapter to convert from 2.5mm to 2.1 mm inside the barrel.
When it comes to the power bank, make sure it can deliver up to 3A through the USB port.
Spoiler alert: if you don't use enough current to power your device, 2A or 2,67A depending on the voltage, you can fry it. The specs provided by manufacturers always have some security buffer, it might work with less current but then you are taking some risks.
You can always provide more current (A) that's ok, the device will use the amount it needs, but never provide less current than the recommended.
