SanJune Guitar Pedal Power Supply 15 DC Outputs Fully Isolated for 9V/12V/18V Effect Pedal (4V to 9V Adjustable)

Man after purchasing all kinds of big brand units over the years I find that this one offers the most outputs and voltage selections. Built like a tank and It’s as small as the MXR iso brick but with twice the power. However I did end up swapping the stock power adapter that comes with the San June to a MEAN WELL GST60A12-P1J. This one doesn't make a weird high pitch hiss sound when plugged in.

My pedals are powered much more quietly than with a $40 Donner power supply, which I'll be returning. Seems to work fine, though I'm confused as to why the red light over the 9V/12V jack is always lit when not in use. (Other jacks will be unlit until used.) There is no explanation as to what the colors above the jacks mean.The 12V power adaptor (not the SP15 itself) makes a strange, very high-pitched sound (up close to the 16k range like the sound an old CRT TV makes with the volume off--similar to the "sound" of your ears ringing) that changes in volume and exact pitch depending on how many pedals are plugged in. It can be fairly noticeable if your ears are good... You'll hear it for just a second as you're turning your head, wonder whether it's was damage or amp/pedal noise, and start checking all your gear... It's physically coming from the outlet-end of the power plug itself.

I had some weirdness by way of a strange high pitch frequency that showed up after introducing a new MXR Reverb pedal to my board. I had 13 pedals and was definitely over drawing my available juice. many of these were daisy chained (power was daisy chained). I installed it, used the increased voltage on the pedals that could take it, and when I was done and testing; I actually thought that my amp was still on standby because it was so unbelievably quite.I literally could only be happier if they gave a couple of longer power cables... they're all like 10" or so. But once I cleaned everything up and place everything, it was enough! But I do want at least two longer... one to get to that Crybaby that is on the floor.Really super happy.

I have a 1 Spot power supply, daisy chaining 12 pedals, really wasn't too noisy untill I got my Blackstar Club 40. It isn't the amp, but something to do with the grounding and the effects loop. At the same time I got the amp I got a Boss NS-2 and started using that in an X configuration. I was getting a lot of ground noise with the amp on the OD2 setting. After a ton of troubleshooting I determined the noise was the 1 Spot. I lived with it for a long time. I saw this power supply on a "recommended for you" page, read the reviews ,figured why not. So my rig is now completely silent, I don't need to turn the Noise Suppressor on except when I stack gain stages. My Bigmuff sounds great on the adjustable voltage channel at about 5 volts, lots of sag. Pretty impressed and would recommend to anyone. Guitar player since 1981

I’m a dirt/fuzz junky and I notice a drastic difference in quality when I engage the 3rd or 4th dirt pedal. I’ve even put the noisy old compressor back one the board. It’s been working perfectly for several hours a day for five+ months. I have no idea what the other folks are talking about regarding noise but, it’s also secured underneath the board were maybe it’s muffled a little? I doubt it though. It’s more likely what they are plugging it into. I’ve never heard the fan come on at all and I feel better knowing it’s there. I’ve researched a lot of these (my third brick) and NOTHING compares to the versatility and cost for isolated power (at least there wasn’t five months ago). If you like whacked out fuzz tones 🤤 try starving a fuzz pedal with the 9v output control (carefully and NEVER with digital pedals). Good luck!