Pyle Compact Mini Hum Eliminator Box - 2 Channel Passive Ground Loop Isolator, Noise Filter,AC Buzz Destroyer, Hum Killer w/ 1/4" TRS Phone,XLR Input/Output, Uses 1:1 Isolation Transformer

There can be many causes of hum / noise in a piece of equipment: * Bad equipment * RFI / EMI (radio frequency or electromagnetic interference) * Bad line power * Guitar-cord related ground loop (most common in guitar / microphone / amp situations) This item works dandy if you are experiencing a ground loop problem. There is a very easy way to test for this too: if you have a guitar amplifier that has unwanted hum / noise, simply unplug the guitar cord. If you're having a cord-related ground loop problem, the hum will vanish. Plug the cord back in, hum returns. That problem is exactly what this is for. Plug you guitar or microphone cord into the "in" jack, plug another into the "out" jack and to your amplifier, and this cleans it up well. An inexpensive and efficient solution. If your noise problem is caused by one of the other factors, that's not what this is designed to fix. You may need the more expensive Hum X or similar device to handle a socket-based ground loop or noise problem, or if it's a problem with electrical noise or RMI/EMI problems, you may need a pricey power conditioner. 3-prong amplifiers: A way to test for socket-based ground loop issues is to use a prong adapter-- one of those orange or gray cheap things that converts a 3 prong plug into a 2 prong. This is for TESTING only as continued us can cause problems (there's a reason your amp has 3 prongs). Plug the amp into the adapter, plug the adapter into your electric socket, and if the hum vanishes a device like the Hum X will fix the problem. Avoid the temptation to just keep using the cheap prong adapter. It removes the grounding of the amp, and is a good way to burn out an amp or even cause a line fire. Of course if your amp only has 2 prongs in the first place, this doesn't apply at all. Bottom line: if the hum is caused by issues between the guitar and amplifier-- such is very easy to check by simply removing the guitar cord-- and this product will fix that. Note that if you have a serious issue with your guitar electronics or pickups, that may require repairing. But in my case this relatively inexpensive solution nearly zeroed my hum issues. Very pleased that it worked for me. If it doesn't work for you-- at least you'll have nice clean guitar line flow and you can look for other causes for hum.

My setup is a Motu M4, a Yamaha HS10 woofer, and two Yamaha HS8 monitors connected with TRS cables. I originally used an iDefender+ on the USB-C connection to my Motu M4 to deal with noise. It significantly reduced the noise, but I still had a low hum. I removed the iDefender+ and installed the Pyle PHE400. The hum is gone along with the other noise the iDefender+ was stopping. Very effective and recommended.

Gets the hum out. Best used in the amps effects loop. Now, realize this is a very budget device, and it gives a comparable performance. I also have used an extra set of patch cables to loop it through twice as I have just filthy electricals.

I have a stereo guitar rig, with two digital/solid state amps (quilter interblock 45 & fender tone master deluxe) I have a ground loop hum since I’m running it stereo, and read up on a few solutions. This seemed to be the most cost effective so i thought I’d start here. Firstly I saw some reviews where people have had quality control issues. For this price point that’s to be expected, luckily Amazon makes returns/exchanges very simple. I have not experienced any QC issues as of yet. Pros: This unit did solve my ground loop hum issue, for a good price at that. Seems to be made well, and could last a while if not thrown around. Cons: it majorly effects your tone. My amp sounded like it had a pillow over it. Now most my think this is a deal breaker, but I was able to mess with the eq and volume on my amp to make it suitable. Usually on my fender I use the normal channel. The vibrato channel is a bit brighter and by messing with the eq and volume I could get a pretty similar tone to my original. Usually I have my treble & bass around 5/6, with this unit in the signal chain, I have to put my bass at 9 and treble close to 10, plus I had to turn the volume up a bit to compensate for a little level loss. I most likely will look for a permanent solution that doesn’t effect the tone as much (and it’ll probably be expensive), but this is a decent solution at a good price for now. I also haven’t tested this with all my gain pedals, which I will soon but so far I’m ok with the results.

Mini Hum Eliminator works beautifully, now my piano recording sounds perfect, like from the professional recording studio. HOWEVER: Please look closely at the photo I attached. When I plugged the 1 foot Orange top quality patch cables to the TS Mono INPUTS (at least marked as IN), the Mini Hum Eliminator seemed to introduce MORE hum to my sound. at first I was so shocked and disappointed, that I wanted to instantly return it. But I remembered one YouTube video saying that passive Direct Boxes work in both directions. So I tried plugging the 1 foot Orange patch cables to the TS Mono OUTPUTS. And voila!!! The hum was gone without leaving a trace of noise in the recorded waveform. I even cranked the gains to the maximum, and the monitoring headphones to the maximum, and then you only hear a tiny white noise, which is normal in all audio systems, even in the audiophile amps, when you crank them all the way up, of course you will have some white noise. But at the recording levels below the clipping levels, the noise is completely gone, I even recorded pure silence, and then amplified it, and all the ground loop noise, as well as the USB MIDI cable generated noise, are all gone. What a relief! PS I'm pretty sure the people who give this unit 1 star haven't tried plugging the unbalanced patch cables to the OUTPUT. they heard the terrible noise and instantly wrote a negative review, nd returned the item. This Hum Eliminator works as good as you could only imagine, BUT you need to know the factory "wrongly" marked the INPUT/OUTPUT.

This is a great device for an even better price. I need audio isolation transformers to test certain functions for different pieces of gear at my job. We use Whirlwind ISO-XL’s which are awesome, but are very expensive at $80 new for a single transformer. This device was a fraction of the price, came with two transformers, and is great build quality. These will allow you to create passive mixers, balancing circuits, and more. Just as an example, I use this device to isolate one half of a Y cable split when testing a Whirlwind 58 channel isolated splitter box using an audio interface and a multimeter. With one of these isolation transformers, I am able to simultaneously test the splitter through Open Sound Meter as well as have an alternate test for the ground lift which is utilizing the continuity test on the multimeter. Enough nerd talk, I approve of this purchase.

Works like a charm. Be cautious about bad reviews. Ground loop noise is just that, it is introduced when you have multiple paths to ground. If you fix one but not others, you may still get noise. Also, noise on a guitar amp is not resolved by putting this between the guitar and amp as the guitar only has one path to ground. It will fix noise if you put it between pedals and a guitar if those pedals get AC power because both the pedals and amp are grounded. It will also work between synts and other audio equipment. Most people just hook these up and expect them to work, not knowing where their noise is originating or how these things work. When they hook it up wrong they blame the device.

Its a good looking unit that requires no power as its more of a filter. My amp has some ground hum because I have it in a bedroom TV cabinet that seem to resinate everything. I have in plugged into a Furman strip but I also have a power supply for my pedals plugged into the same wall plug in and i pickup some mild 60hz hum that is only noticable with the volume up about 5 or more. Not bad but still bugs me. I use it last in line after a noise gate that works great on pedal hiss and run it into the hum eliminator then to the amp. It doesnt get rid of all the hum but it lowers it at least 50% or more. It has 2 set of 2 different styles of plug ins and sometimes I swap from 1 to 2 and vice versa to get the lowest hum. For the money I think its a good buy. It lowers the hum low enough I cannot hear any at 8 to 10'. This unit with a noise gate keeps my stuff very quite even running a metal pedal and other modulations and reverbs. Definately happy with the results. If I have paid $100 or more I might be disappointed because there is still a little hum, but this inexpensive simple unit does actually work pretty good. Not perfect but does make it a little more tolerable. Im using this on tube amps from15w to 75w and happy with the investment. As a up date after owning the unit for several months and rearranging my pedal power and plugging the amp into a furman instead of a wall socket the overall 60hz hum has gotten even lower now. With nearly non existent pedal hiss except on a inexpensive high gain metal pedal but I dont have to have my noise gate on to play and not have excessive hiss at all. The 60hz hum is now barely audible with volume on 6 and gain up to 5 or 6. Seriously for $20 bucks and it doesnt change my tone a bit its well worth it! Just spend a little time moving power cords around and I ended up with the amp power on the end of the furman strip and that help quit a bit. I have a couple boost and overdrive pedals that are sounding way better now and I keep them turned up about as high as they will go most of the time.