Komplete Kontrol S88 power supply socket size?

Blah-Bloh · 2025-05-17T07:28:47+00:00

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Hello,

I would like to buy a small cable extension for the power supply of my S88 Mk2. The reason is that I have to plug and unplug the keyboard every time I use it and I fear it will prematurely damage it and I sure don't have the skill to replace the port myself.

So my question is what is the size I should be looking for so it plugs correctly?

Thanks

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JesterMgee

https://community.native-instruments.com/discussion/comment/226736#Comment_226736

There is no issue with this, not sure where you get that info from.

OP, you are looking for a "DC 2.5mm" cable, Male to Female in whatever extension length is suitable. You can easily make one if you know how to solder

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PoorFellow

https://community.native-instruments.com/discussion/45232/komplete-kontrol-s88-power-supply-socket-size

From what I can see then the plug is 5.5mm outside and x 2.5mm inside , else you can try measure what you have.

But frankly , then if looking for an extension then would it not be a lot easier to extend the wall socket plug side of the adapter with a standard extension chord that can be used for all devices in your home ?

PK The DJ

I agree, you should be unplugging (or turning off) the supply from the wall socket/plug end rather than the low voltage keyboard end. It's not advisable to leave PSUs powered up with no load.

Blah-Bloh

Last time I tried buying that kind of cable based on me measuring it it didn't go so well ¯_(ツ)_/¯

No the wall socked is not the issue, it is plugged in permanently. I just need a 5-ish cm extension I leave in the keyboard so I'm not constantly pluging in and out and damaging the port.

PoorFellow

https://community.native-instruments.com/discussion/comment/226737#Comment_226737

I just need a 5-ish cm extension I leave in the keyboard so I'm not constantly pluging in and out and damaging the port.

Guess that you are looking for something like this. I would still check by measuring what you have already. but otherwise then this is my best guess without measuring anything myself that is , and I have not had time for that yet and have other to do later today so I don't know when if I will do.

Blah-Bloh

Yes, that's the kind of thing I need, but I must know the size as I don't see how I could measure it with a precision of a tenth of mm. I was hoping someone from NI would see the message and give me the actual spec.

PoorFellow

https://community.native-instruments.com/discussion/comment/226744#Comment_226744

For what is is worth then I just measured the plug on my own power supply for the S61 Mk2 and it appears as if that is 5.5 mm at the outside and 2.5 mm inside (my apologies but my keyboards are completely covered due to my cats and I also had to find the callipers/'Vernier callipers' to do the measuring with) (Having a set of accurate metal callipers/'Vernier callipers' in your home and being able to use those is very useful in a situation like this) .

Anyway , if a best efforts measuring is not enough for you then you will have to ask N.I. Komplete Kontrol Support or N.I. Hardware Support . (I don't give any warranties and I am not a N.I. employee so for those you will have to ask N.I.)

In case that you need guidance contacting support : How to contact NI Support and How to get in touch with our Customer Care

JesterMgee

https://community.native-instruments.com/discussion/comment/226736#Comment_226736

There is no issue with this, not sure where you get that info from.

OP, you are looking for a "DC 2.5mm" cable, Male to Female in whatever extension length is suitable. You can easily make one if you know how to solder

PK The DJ

"not sure where you get that info from"

How about over 40 years of electronics experience? Manufacturing, testing, repairing.

From Google:

Running a power supply with no load, also known as operating it with an open circuit, can be problematic and may not be safe or recommended for all power supplies. While some modern, reputable power supplies are designed to handle no-load operation, others may exhibit issues like overvoltage, undervoltage, or significant ripple

JesterMgee

https://community.native-instruments.com/discussion/comment/227090#Comment_227090

30 years of experience myself, also an electronics technician of 20 years and qualified in both electronics and computer systems…, switchmode P/S have no issue without a load, they do not generate any output when no load is attached. Transformer based supplies can increase in voltage when unloaded, however this is normal and does not typically cause an issue because with no load there is no current, that's about it. Seems a strange claim from where I was educated and have never seen an issue with an unloaded P/S at all.

Never have I seen a warning anywhere like this, But Google will always have an answer to everything…

Blah-Bloh

https://community.native-instruments.com/discussion/comment/227086#Comment_227086

Thank you very much.

https://community.native-instruments.com/discussion/comment/227090#Comment_227090

Not an issue, the socket has an off-switch.

PK The DJ

@JesterMgee aside from anything else, IMO it's not good advice to suggest that someone leave an electrical device plugged in and running when it's not being used. 🤔

JesterMgee

https://community.native-instruments.com/discussion/comment/227125#Comment_227125

Don't want to stir up a massive debate over something rather trivial but seems more something google suggests based on hearsay than anything grounded in actual reason.

Now, I was not suggesting people "leave things plugged in when not in use" (tho 90% of our appliances in our homes are left connected to power when not in use…), simply suggesting that the claim it can cause damage if disconnected from the load does not sound correct to me. No one is pulling all their plug packs out the walls when they disconnect their devices (chargers for instance) and many appliances physically disconnect the power from the circuit via the power switch which is technically the same thing so logically, that makes no real sense. Sure, won't hurt to be over cautious but leaving a modern plug pack plugged in when not connected to anything is not going to cause any damage, it's not like it's building up pressure/heat or something, maybe just consume 0.2w of power for the standby circuit.

There are however cases from decades gone by which may be where you are getting the info from where iron-core transformer driven power supplies, especially ones potted in epoxy (like the old Commodore/Amstrad computer supplies) that could indeed continue to heat up even when unplugged. These were terribly cheap supplies which would run noisy and physically vibrate/hum and this would build up over time and was 100% needed to be unplugged when not in use. I have had several fail due to being left plugged in, even an old model railroad rheostat power supply actually go bang due to overheating when powering nothing, but most modern supplies are switch mode and have no such issues. In fact, there are more problems via things like overcharged/undercharged battery packs than power supplies these days.

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