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This Item  Hiree Guitar Pedal Power Supply Adapter Station Distributor 10 Isolated DC Output for 9V/12V/18V Effect PedalBoard with 4 AC Outlet for Charging Speaker, Musical Instruments | ![SanJune Guitar Pedal Power Supply - [TRUELY Isolated] 12 DC Outputs for 9V/12V/18V Effect Pedal (9V to 18V Adjustable)](https://m.media-amazon.com/images/I/51BuQR0oLnL._AC_.jpg) |  |  |  |  | |
| Price | $26.99 | $109.99 | $59.99 | $49.99 | $49.99 | $9.90 |
| Delivery | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 | Get it as soon as Thursday, May 16 |
| Customer Ratings | ||||||
| Value for money | ||||||
| Versatility | ||||||
| Light weight | ||||||
| Sturdiness | ||||||
| Sold By | Hiree | SanJune | BEI CAI - US | Donner Music | BEI CAI - US | Stax Music |
| connector type | Barrel Connector | Barrel Connector | USB | USB | — | Barrel Connector |
| number of usb ports | 4 | — | 1 | 1 | — | — |
| compatible devices | Speakers | Effect pedals | Guitar Pedals, Effect Pedals, Pedalboards | Musical Instruments | Guitar Pedal Board, Guitar Effect Pedal | adapter |
| input voltage | 240 volts | 12 volts | 12 volts | 18 volts | 18 volts of direct current | 9 volts |
| connector gender | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male |
| power source | AC | Corded Electric | Corded Electric | Corded Electric | Corded Electric | Corded Electric |
| output voltage | — | 18 volts | 12 volts | 12 volts | 9 volts | 9 volts |
Reviews with images
Basic pedal supply. Can be improved if you're handy.
This is a good basic pedal supply if you're on a tight budget. It's a basic switch-mode power supply with 7 parallel outputs on the secondary side of the transformer. In plain English, the outputs are not fully isolated from one another; they all connect to a single source and share a common ground.On the unit I received, all outputs share a 3000uF cap bank (3x1000uF electrolytics). There were unpopulated pads for three additional caps in this bank; each of the 7 outputs also had an unpopulated pad for a polarized cap, individual to each output.I installed a 100uF capacitor in one of these locations and compared that output to an unmodified output. I was pleased to see the ripple drop by around 60%, from around 66mV to 25mV. In plain English, the output with the 100uF capacitor added to it was less noisy than the unmodified output.I've added an oscilloscope screen capture to show how the signals of these two outputs compared; the red trace shows the unmodified output while the green trace shows the output with the added cap. I've also added a photo of the inside of my device to show where I added capacitors to the individual outputs.The power supply is probably fine as-is, I wouldn't know because I didn't spend any significant length of time using it before opening it up and messing with it. Once I had it open and saw what was there, I just took the opportunity to make it (subjectively) "better."I also experimented with adding caps to the 3000uF cap bank but found that the power supply output behaved more and more erratically under load as I increased the amount of capacitance to that node. I abandoned the thought of beefing up that section and left it as-is. I suspect further circuit adjustments could be made to correct for added capacitance but I was pleased enough with my results up to this point that I didn't bother. Given that most modern pedals have their own power supply filtering, power supply noise seen by the effect will be reduced from 25-30mV to somewhere around 10-15mV with this simple modification.If you are going to attempt to duplicate measurements and/or perform this same modification on your own, do so at your own risk! There is always a risk of damaging the circuit board while soldering, and powering this supply with the cover removed exposes you to lethal doses of electricity.Final note: as far as my circuit tracing tells me, every output circuit is the same; this means you can power a 300mA pedal from any output, not just the one designated as a high current output. However, it's likely not a good idea to exceed the 900mA limit implied by the 6x100mA + 1x300mA output designations. Know what the combined current ratings of your pedals are and stay within the limitations of your supply!
Top reviews from the United States
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Reviewed in the United States on May 3, 2023
On the unit I received, all outputs share a 3000uF cap bank (3x1000uF electrolytics). There were unpopulated pads for three additional caps in this bank; each of the 7 outputs also had an unpopulated pad for a polarized cap, individual to each output.
I installed a 100uF capacitor in one of these locations and compared that output to an unmodified output. I was pleased to see the ripple drop by around 60%, from around 66mV to 25mV. In plain English, the output with the 100uF capacitor added to it was less noisy than the unmodified output.
I've added an oscilloscope screen capture to show how the signals of these two outputs compared; the red trace shows the unmodified output while the green trace shows the output with the added cap. I've also added a photo of the inside of my device to show where I added capacitors to the individual outputs.
The power supply is probably fine as-is, I wouldn't know because I didn't spend any significant length of time using it before opening it up and messing with it. Once I had it open and saw what was there, I just took the opportunity to make it (subjectively) "better."
I also experimented with adding caps to the 3000uF cap bank but found that the power supply output behaved more and more erratically under load as I increased the amount of capacitance to that node. I abandoned the thought of beefing up that section and left it as-is. I suspect further circuit adjustments could be made to correct for added capacitance but I was pleased enough with my results up to this point that I didn't bother. Given that most modern pedals have their own power supply filtering, power supply noise seen by the effect will be reduced from 25-30mV to somewhere around 10-15mV with this simple modification.
If you are going to attempt to duplicate measurements and/or perform this same modification on your own, do so at your own risk! There is always a risk of damaging the circuit board while soldering, and powering this supply with the cover removed exposes you to lethal doses of electricity.
Final note: as far as my circuit tracing tells me, every output circuit is the same; this means you can power a 300mA pedal from any output, not just the one designated as a high current output. However, it's likely not a good idea to exceed the 900mA limit implied by the 6x100mA + 1x300mA output designations. Know what the combined current ratings of your pedals are and stay within the limitations of your supply!
Color: 9vVerified Purchase
Basic pedal supply. Can be improved if you're handy.
Reviewed in the United States on May 3, 2023
This is a good basic pedal supply if you're on a tight budget. It's a basic switch-mode power supply with 7 parallel outputs on the secondary side of the transformer. In plain English, the outputs are not fully isolated from one another; they all connect to a single source and share a common ground.Reviewed in the United States on May 3, 2023
On the unit I received, all outputs share a 3000uF cap bank (3x1000uF electrolytics). There were unpopulated pads for three additional caps in this bank; each of the 7 outputs also had an unpopulated pad for a polarized cap, individual to each output.
I installed a 100uF capacitor in one of these locations and compared that output to an unmodified output. I was pleased to see the ripple drop by around 60%, from around 66mV to 25mV. In plain English, the output with the 100uF capacitor added to it was less noisy than the unmodified output.
I've added an oscilloscope screen capture to show how the signals of these two outputs compared; the red trace shows the unmodified output while the green trace shows the output with the added cap. I've also added a photo of the inside of my device to show where I added capacitors to the individual outputs.
The power supply is probably fine as-is, I wouldn't know because I didn't spend any significant length of time using it before opening it up and messing with it. Once I had it open and saw what was there, I just took the opportunity to make it (subjectively) "better."
I also experimented with adding caps to the 3000uF cap bank but found that the power supply output behaved more and more erratically under load as I increased the amount of capacitance to that node. I abandoned the thought of beefing up that section and left it as-is. I suspect further circuit adjustments could be made to correct for added capacitance but I was pleased enough with my results up to this point that I didn't bother. Given that most modern pedals have their own power supply filtering, power supply noise seen by the effect will be reduced from 25-30mV to somewhere around 10-15mV with this simple modification.
If you are going to attempt to duplicate measurements and/or perform this same modification on your own, do so at your own risk! There is always a risk of damaging the circuit board while soldering, and powering this supply with the cover removed exposes you to lethal doses of electricity.
Final note: as far as my circuit tracing tells me, every output circuit is the same; this means you can power a 300mA pedal from any output, not just the one designated as a high current output. However, it's likely not a good idea to exceed the 900mA limit implied by the 6x100mA + 1x300mA output designations. Know what the combined current ratings of your pedals are and stay within the limitations of your supply!
Images in this review
Top reviews from other countries
david l
without noise, sturdy
Reviewed in Canada on October 22, 2023Color: 9V/12V/18VVerified Purchase
Guillermo Avalos Flores
Gran producto, bajo precio.
Reviewed in Mexico on November 10, 2022Color: 9V/12V/18VVerified Purchase
Guillermo Avalos Flores
Reviewed in Mexico on November 10, 2022
Images in this review
