What are the KeyControl 49/KeyControl 49+ power supply specs?
49 / KeyControl
49+ can be used with an optional external power supply. This might be needed
in case the USB power from the host computer is not powerful enough. For that,
KeyControl 49 / KeyControl 49+ can be used with an optional standard power supply
which is not available from us. Definitly a power supply is needed if you want
to use the keyboard standalone without a computer.
The power supply needs to be regulated and provide 9V DC with
at least 500mA. The outside (sleeve) of the connector is -, while
the inside (tip) is +. The connector diameter is 5.5mm (= 2.2in).
Such a power supply is a standard part that can be purchased via most music
or electronic retailers and mail order companies. If you are unsure, print out
this page and show it at your local shop.