JOYO ZGP Guitar Pedal Power Noise Blocker Support DC 9V Max 800mA Output and Power Supply Isolation (JP-06)

I have a bunch of analog pedals, some with charge pumps, and one digital delay, which is a BOSS DD-500. Having the DD-500 daisy chained introduced plenty of digital whine noise. This device, connected just to the DD-500 got rid of the noise in a jiffy, making the need for an expensive power supply like Cioks or Voodoo Labs moot.If I add more digital pedals to a pedal board for live performances or something, I might use more of these or an expensive unit... But just for one digital pedal or in the studio where I'm hooking things up and shifting them around daily, this does the job perfectly and I'll stick to regular wall warts with daisy chains and these on digital pedals.Basically, at home and in the studio, I don't use pedal boards per-se... I just get like a black, $5 food tray and put my pedals on that. No velcro etc. Easily rearranged, keeps things relatively tidy, and I can move the tray from place to place NP.I may buy a second one for that occasional need.Going forward, I vote for manufacturers of digital pedals to ALL include power filtering in their problematic pedals so that we don't need these big, dumb power supplies. Add some non-sacrificial fuses or something too.

I have a very cheap octave pedal that hums when it shares a power supply with my other pedals. I need to isolate the power supply from that one pedal, but my options weren't great: buy an expensive power supply with isolated outputs, tape a battery to my pedal board, maybe add a wall wart. This is the prefect solution: it's compact, it's cheap, and it works.This isolates the DC power supply for a single 150 mA pedal on my board, eliminating hum caused by that pedal.

I got this for a noisy pedal and it worked, taking out almost all the noise, and I was happy with it until today, when it just cut out. After it stopped working, if I unplug it and then replug it, it will work again for a few seconds and then it loses power and the LED goes off. Frustrating that it is not returnable. I guess it is poorly made so I recommend buying something that is higher quality.

Having emi interference and just thought why not? I can say it definitely does do something and it does theoretically work and makes a difference. But! For my whole problem it wasnt a miracle worker to solve what I needed. It silenced a noticable amount, but not all.It definitely does work. It depends on what problem your dealing with.

Felt compelled to write a review since I’ve seen so many negative on here. This thing is awesome! Purchased a Walrus Audio Canvas Tuner recently, plugged it in and there was a nasty hum in my signal chain. Come to find out that the pedal needs ISOLATED power. (I currently run a tourtek rechargeable powered pedalboard, plenty of power but no isolated dc outputs.)Enter the ZGP! Plugged it in, mounted under my pedalboard with a small Velcro strip and done! Pedal is quiet now with no hum or interference noise. Purchased a second unit to have on hand as back-up!

I'm using this with a Joyo Power Supply 5 to power a Zoom G3Xn. It filters out the high-frequency whine introduced by the Joyo power supply (which is annoying in the first place.) But, now, if you leave the power for the Zoom effects unit turned on, it will not power up when you turn on the Joyo power supply. You have to turn the Zoom effects unit off and back on in order for it to start. This isn't a problem when running without the ZGP Noise Blocker.

Worked great for me. I had two pedals when powered by the same wall-wart generated a loud hum through the amp. Separating them with two power adapters stopped the hum. Even when daisy chained together on battery, the hum persisted. I took a chance on this device and I’ll be darned if it didn’t work…. Hum completely gone. Saved me a lot of money on an isolated power supply. May not work in all applications, but in my case, it’s perfect. I’ll buy another to have as a backup.

I read several favorable reviews for this product. So I made a purchase last week and held great expectations this would reduce or eliminate the noise from my ProCo Turbo Rat pedal.I unfortunately have to write to tell that I cannot perceive a difference than without it. In fact the noise may be worse when connected in series with an already isolated power adapter separate from my other pedals.This week I plan to create some audio/video recordings to capture evidence in hopes that others or the manufacturer can determine if I'm doing something wrong, or if the product is maybe defective.I give 2 stars for simplicity and price. Maybe the saying, "You get what you pay for" applies here.