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Joined: Oct 2008
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The little blurb under the DC input says "use only PSB-1U" (now PSB-120). That power supply is 9V 2A. But just to the left, as well as in the manual, it says the power requirements are 9V 300mA. I have at least one power supply that provides that output. Is 9V 2A really necessary?

(I'm out of USB ports crazy)

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Cost of power supply is practically the same for this output current range. Roland simply buys an off-the-shelf PS, customized (labels and connectors) so it makes no sense for the PS supplier to develop a lower output current version.

As for yours, you must make sure the connector is the same (this kind of connector has different pin diameters), the polarity is correct and the PS output voltage quality is decent (cheap transformer based ones may be unregulated). If affirmative, you may try connecting it and see how it fares.

Now, in all honesty, considering the price you paid for the controller, why taking any chances just to save $40?

Last edited by EVC2017; 05/15/22 09:00 AM.

Kawai ES8, Roland RD2000, Yamaha AG06 mixer, Presonus Eris E5 monitors, Sennheiser HD598SR phones.
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Originally Posted by moshuajusic
I have at least one power supply that provides that output. Is 9V 2A really necessary?

If the instrument really has specs that indicate 9V, 300 mA requirement. Then sure ...... a good quality DC supply rated at 9V and 300 mA can be used. I often like to use a supply that can output significantly more power than what the instrument needs anyway.

Out if USB ports is fine. Just use a powerboard connected to mains socket ..... and then use a suitable ac/dc adaptor of own choice.

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Originally Posted by SouthPark
Out if USB ports is fine. Just use a powerboard connected to mains socket ..... and then use a suitable ac/dc adaptor of own choice.

Typo --- Out of USB ports is fine.

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It just shipped today. Been trying to triangulate power supply. I just hate when companies nickel and dime you.

But I def don't trust the hundreds of Amazon listings for generic ones with "PSB-1U" in the title. Even those universal power supplies with variable voltage, reverse polarity option, and multiple tips have enough negative reviews to make me suspicious.

Name brand ripoff it is. smirk

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Yes - true. A power supply purchased from a company that follows safety standards very closely (and properly) is a good idea.

There have been known cases in the past - where isolation between the mains AC side and the DC side failed, and that is very concerning indeed. Cheap is sometimes ok. And then there is cheap and nasty. And some can even be cheap and potentially deadly.

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So much for that. I took a chance on a Guitar Center "open box blemish" deal which is supposed to be light cosmetic wear, full manufacturer's warranty. Looked like it fell out the truck a few [dozen] times. Date-sized chunk of particle board knocked off the bottom, I heard a piece knock around inside, tiny styrofoam boogers lodged between keys from the broken up blocks floating around, no protective sheath on the keyboard itself, etc.

Returned to a local GC.


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