Hum Eliminator

I hadn't had a chance to use this box until recently. The power in the venue I was in has always been problematic at best with light dimmers and motors in the ceiling for special effect lighting. My guitar processor seems to be sensitive to it and was horribly buzzing to the point where I couldn't use it. I had to use the sampled sounds on my Roland GR-55 for guitar sounds. During our break I remembered I had packed it and figured, what the hell. The damn thing worked! The buzzing which by the way wasn't the standard 60 cycle hum was diminished to the point that I could again use my whole rig. I used it again a day later at a rehearsal with a different band. There was a weird static in the lines and this time my vocal harmonizer was affected. I plugged in the box right after the harmonizer and it worked again. Apparently it will stop other kinds of noise and I'm sure it has it's limits so I've bought a power conditioner and between the 2 of them my rig should be silent again. I highly recommend the hum eliminator.

This product works. It does kill some of the hum. The only problem is this company who is selling them keeps sending me "refurbished" ones when they are supposed to be new. The first unit I received only one channel worked, the other had a short in it. The second unit they sent me was dead.So what I suggest to everyone is go buy it at your local store. Have them order it if need be. Don't by it from this seller on Amazon. Once my busy touring schedule is over, I'll be returning both units for a refund. It's unfair to be expecting a new unit, and getting a refurbished broke unit instead.

Audio Recording: if this doesn't solve your issue, then you have more than just ground loops affecting your sound. The only way to remove the annoying noises is to find what's causing them. This will help drastically.Ground loops fixed- my computer and audio interfaces are plugged into the same outlet, creating a loud griundloop when I plug the 3.5mm output of the computer into my mixer. As well as that, I connect an audio interface to my mixer by outputting the sound through 1/4" cables. The mixer. Hum and noise was overpoweringly loud. The Ebtech him eliminator removed the noise from being created from ground loops.Additional ground loop noise: I had remaining noise caused by my mixer feeding the final mix of sound into the computer (another ground loop between my PC and mixer. I had to find a noise reduction tool to eliminate the USB ground loop. I found a noise isolator from Intona (sold on Amazon). It's pricey, but is meant for hi speed transfer, which is audio recording.Quality of sound: other than noise reduction, I found no impact to audio quality. This box is passive, does not draw power, and fits in between your source and its destination along the line of cables.Identify what's causing the noise, attempt a solution, save your box, and return if necessary. But remember, there could be multiple issues with your system. This might only fix 1 of the few issues you're having.Recommend: I was highly skeptical. After testing and identifying my remaining causes of noise, I bought a second unitp.

This product solved my problem!!! And I highly recommend this unit to any and all true audiophiles that HAVE TO HAVE THAT PERFECT, CLEAR SOUND!!! I usually don't write reviews. But I had to give credit to EBtech. I was very skeptical as to whether or not this item would solve my problem. But I took the risk and I was richly rewarded!!! I had recently purchased a very high end PA System AND very high end keyboard workstation. And when I connected the two, I received this awful, annoying hum/buzz that just wouldn't go away. After some researching, I learned that this phenomenon is commonly referred to as the “60-Cycle Hum” and “Ground-Loop Hum.” Well, thanks to the “EBTech Hum Eliminator” that annoying hum is gone! And I am enjoying hum-free, crystal-clear sound from my keyboard and PA System!

The hum eliminator did not work in my application. I have a Takamine 12 string acoustic/electric that picks up a hum from somewhere in my rig, but it's intermittent. Some days it's there, some days the signal is clear. Tried the Hum Eliminator to see if it would take out this annoying hum, but it did not. I have some kind of grounding issue, as I ground the guitar to my body with a guitar string from my pinky to the end jack. It works, but it's inelegant and goofy looking. I think the hum has something to do with my laptop, but have never been able to track it all the way down...

I tried this unit with my main guitar pedalboard for my electric rig. It made the ground loop hum worse.

Reduced most of the hum, but didn't completely eliminate it. I used a USB isolator that totally removed the hum caused by computer that was in-line with my equipment. I could've saved $57 .. not to mention that the USB isolator was only $3, but because the Ebtech did eliminate some of the hum, I gave it a 3. Tracking down a ground loop is a pain in the behind. I didn't have it with my gear when I used an ultrabook computer. When I needed more computing power and upgraded my unit to a desktop, I developed the ground loop hum.

Overall I am happy with this product. However, I noticed that when using this isolation transformer after the pedals in my effects loop it causes a ~10db volume boost (but it did get rid of 100% of the hum). This is undesirable obviously, but I was able to work around this issue by putting the transformer in the loop before the pedals, however there is a slight but noticeable hum remaining when I place the transformer there. It's maybe 5% of what it was without the transformer. It's completely acceptable to me, but it might not be to others.