The 2.5A and 250V on the cable is just the highest current (Ampere) and voltage (Volts) that it's safe to use at.
Provided that your mains supply is in the range 100V to 240V
then that's no problem.
If you're not sure about the voltage in your country take a look at the Mains electricity by country article on Wikipedia.
music.stackexchange.com/users/19615/Simon B
To plug what to what??
If your cable fits the power supply for the keyboard, then that's fine.
If you're considering plugging it straight into the Waldorf directly, it will go BOOOM big time.
[I'm assuming it's the first - the second really shouldn't be physically possible.
If it was, someone would have set their house on fire by now]
music.stackexchange.com/users/12556/Tetsujin
A simple cable with just wires and no electronics inside, as the one your photo shows, will simply forward any voltage.
It won't change it.
The label on the cable specifies the maximum voltage it was made for.
You can use it for any lower voltage as well.
The ~ says that the voltage is alternating, in contrast to = where the voltage is constant (aka.
direct).
I'm not sure how many different Waldorf Blofeld models exist, but one looks like this: If your keyboard has this connector labelled AC
In (alternating current in), then your cable will fit into the wall on one side and into the keyboard on the other side.
No serious electronics engineer would construct a 12 V= plug with that kind of connector, simply because everybody expects to put 110 V~ or 230 V~ into it.
A typical low voltage DC connector looks like this:
So there's no way you could accidentally mix a high voltage AC cable with a low voltage DC plug.
If your keyboard has a low voltage DC connector, then you need a power supply that converts 110 or 230 V~ to 12 V= like this (should have been shipped):
As you can see, it has the high voltage connector on one side and the low voltage connector on the other side.
music.stackexchange.com/users/34120/Thomas Weller
No.
The 250v is AC, and the keyboard is DC, and only 12volts.
Completely incompatible.
Playstation plug is a 'figure of eight' or 'Grundig' plug, used exclusively for mains powered items.
It also gets used to power the black boxes (psu) which do transform 250vac into the 12vdc that your keyboard requires.
But do not connect up direct.
I can't think how you could anyway, as the keyboard will have a round socket for power, so it wouldn't (thankfully) fit.
EDIT _
I get it now!
The figure of eight plug will fit your keyboard, it's just that the end which goes in the wall socket isn't right for your country!
Any wire with the right plug ito the wall, and a figure of eight at the other end will do!
music.stackexchange.com/users/2808/Tim
The Waldorf Blofeld requires a "tip positive" DC barrel connector supplying 12 Volt at least at 500 mA.
The mains should only connect connect to a step down transformer and rectifier to convert it from 250 Volts AC to 12 Volts DC.
Only use the mains PlayStation cable to the mains transformer.
music.stackexchange.com/users/2567/Rob Kam
Cite from the FAQ at https://support.waldorfmusic.com/products/Blofeld%20Keyboard
Can I use my Blofeld Keyboard with the power grid in my country?
The device comes with a wide range power supply which covers everything between 50-60 Hz and 110-240V.
You just need a power cord with a "figure of 8" cable, also known as C7 connector and the other plug matching the power grid standard in your country.
A voltage converter is not needed.
Cite from https://www.power-plugs-sockets.com/south-korea/ In South Korea
the power plugs and sockets are of type C and F.
The standard voltage is 220 V and the standard frequency is 60 Hz.
So your cable should fit.
music.stackexchange.com/users/65495/Mike11
I just got my new synthesizer, Waldorf Blofeld Keyboard.  I live in Korea and the power plug that came with won't match.  This is the plug that came with the keyboard:   and this is the receptacle on the back of the keyboard:   The Waldorf specs are  Nominal voltage: DC12V Supply Voltage: 100-240v Maximum current consumption: 0.3 A Maximum power consumption: 5 W    I have playstation cable which is 2.5A 250V~   Could I plug this to my Waldorf Blofeld Keyboard ?   Would it be ok ?
Can I plug a 2.5A 250V~ cable to a synth that is 100 - 240v?
music.stackexchange.com
<synthesizer><electronics>
music.stackexchange.com/questions/93837
music.stackexchange.com/users/47848/Hyun Yoo Park
The 2.5A and 250V on the cable is just the highest current (Ampere) and voltage (Volts) that it's safe to use at. The mains should only connect connect to a step down transformer and rectifier to convert it from 250 Volts AC to 12 Volts DC. The Waldorf Blofeld is safe to use at 2.5A and 250V. It
The Waldorf Blofeld is safe to use at 2.5A and 250V. It requires a "tip positive" DC barrel connector to supply 12 Volt. The mains should only connect connect to a step down transformer and rectifier to convert it from 250 Volts AC to 12 Volts DC.