SoulBay Universal Center Negative Power Supply, 3V-12V 2A, 8 Plugs | DC 3V 4.5V 5V 6V 7.5V 9V 12V Multi Voltage AC to DC Adapter, for Guitar Effects Pedals, Keyboards, Musical Instruments

Have an old fiber optic tree and I lost the power adapter. I saw this and it has every adapter on it plus you can adjust the voltage. Works perfectly and a good price.

works as expected

I was looking for a power adapter for a Casio CDP100 which requires a 12V 2A non standard negative center pin. This power adapter has the ability to switch voltages which was great and it also comes with a number of connector to fit different hole sizes. Unfortunately the CDP100 power connector hole is very non standard and requires a short connector. This power supply did power the keyboard but slight movements would lose connection. Still rating this adapter high but a different connector is needed for the CDP100.

Works as advertised

The product arrived fine and works perfectly for the few devices I have that need a central negative plug.

I found this neat ball clock at goodwill for a good price and had to pick it up. It did not come with a power adapter and it happened to be center negative. I work with electronics a lot and have never come across a center negative device before. This adapter was only a few dollars more than a different one on amazon, but is way more valuable because of the variable voltage. Since center negative is so rare, if I ever find another device that needs it I can just adjust the voltage and borrow the clock's power supply.

The pins on plug adapters are of a different size of the end of the cord and not able to plug the adapters into the cord. the adapters have 1 small male pin and 1 large male pin, cord has 2 small female pins. Returned for refund

Needed a negative polarity (which I believe a lot/possibly most guitar effects pedals use) along with 12V and 2Amps power. That 12V/2A/Neg Polarity combo was extremely hard to find but is required to power an older T-Rex Octavius Octave Generating Pedal. This pedal really saved the day for that one. Switched it to 12V and attached the largest physical plug-in adapter they included properly; it fit tight and fired right up all around. I suspect it would also work with 9V guitar pedals (of which there are many) if you switch it over to the 9V designation but have not tested that.

I use it with a Roland Sound Canvas SC-88VL midi sound module, where it works perfectly. The voltage setting is very firmly locked, was concerned it might move or something but you really have to torque it with the included key or other small flat object to get it to turn.

Trying to find the correct adapter can be a real hassle, because sellers can't know what width of tip you need in spite of the rest of the specs. This one solved that issue.

When you turn up the volume on the device you’re powering and the unit is under heavy load, the item it’s powering has power loss and the speakers go all staticky. The led viewscreen dims out. This unit is rated at 2A. The unit never did this with the old adapter. (Also rated at 2A). Also the prongs only fit one way which means you can only set it up with negative Center. Which limits the overall usability of the adapter. **! Update, I put the unit to the voltage setting next up from what the unit it was used on called for. No more staticky fade outs. So I’m changing the unit to 4 stars

Was looking for a replacement for my Korg 05R/W power supply and this works perfectly. Arrived the next day and seems well-made.

Utiliser pour un petit ampli à guitare qui achevais la petite batterie 9 volts en moins de deux. Problème régler!!