Power supplies
Got a sick deal on a Rolaha Sound Korgvas 5500, but it didn't come with a power supply?
Importing a unit from a different region, and worried about different mains voltage / frequency / sockets?
Your power supply broke?
Fear not, this is the page for you!
Units with DC power input
USB bus power
If the unit is USB "bus powered", that means it's powered by the USB input. This makes everything simple. Note that there are also units that have USB ports but are not powered by USB. On those devices, the ports are for data only.
Barrel jack
Many devices accept low-voltage DC (direct current) power via a barrel jack. This means:
- The actual power supply is a separate unit, not part of the device itself.
- Only the power supply is tied to a specific type of mains AC power. The device itself is region-independent.
- If the power supply breaks or doesn't work in your region, you can just get another power supply that works for you.
- You aren't stuck with some failure-prone, inefficient old power supply. You can probably get a brand new one.
Barrel jacks are usually a common type that's used by several manufacturers. This means:
- You don't need an original Roland/Yamaha/whatever power supply. You can get one from any brand, just pay close attention to the specs.
- If it's more convenient, you can get a "universal" supply that will work for several types of barrel jack.
TBD: list common units, relevant standards, example compatible power adapters
TBD: size, polarity, volts, amps
Units with AC power input
TBD