PylePRO 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 PHE400

Used to connect my electric guitar to amp.1. Attenuates the actual signal heavily.2. Boosts the humming noise.Not fit for the purpose. Might be useful somewhere else.. maybe..As a good paper weight.

I returned back as doest not work for me. I connect to my microphone to mixer and didn't work.

This is a perfect device to introduce more noise

Works great. Gets rid of the buzz in my audio playback for my EMU MP7.

I have 2 identical older stereo Midi sound modules, made in 1995-96. They're almost impossible to find now, and are worth very much to me, for the excellent sounds I get out of them.The 1st one I bought new, the 2nd one, I bought used.The 1st one has always worked fine and still does.The 2nd one has humming/buzzing from both L/R outputs.I compared both units using the exact same settings, and the identical amount of gain, side by side in my top-quality sound mixer.The one I bought new, has no humming/buzzing, while the used one does, (and presumably why it was for sale {?}).I contacted Roland Service, the manufacturer to see if they would still service these older units, (which are now 28-29 years old), and if parts were even still available, before I spent $40 dollars (or more) on shipping both ways, plus $80 an hour just to diagnose the issue, (before any potential parts needed and any further additional repair service fees).I never got a reply from Roland.I also had a nearby Roland Approved Service Repair guy look at it a few years ago, but he couldn’t find anything wrong with it.[I guess I should have given him both to compare the 2, like I have].So, I decided to try this based on a few positive reviews.Bingo! Instant fix!Exactly what I needed. No hum or buzz whatsoever!To be sure, I double-checked by unplugging it and trying it again directly back into the mixer, and then inserting this device back in-line (stereo) again for a second time.No more humming/buzzing – at all!Instant success - all without yet another wall-wart power supply to find a place for in my already over-crowded music studio.So, for what would have been the (estimated) cost of just shipping alone of my sound module for repair, [never mind the down time/wait for repair and return time, plus at least the shop rate diagnosis service fee, starting at $80 hour] - problem solved!I like this item so much already, that I just might buy another so I always have a spare one on hand.Great product! Highly recommended!Thank you, Pyle!I’m pleased to leave this review for you and other customers.

It seems to filter the bass and certain parts of Audio... Have stopped using it... decided to hold on to it... but not sure if I can sort it out using settings on my Audio recorder...

It can only remove hum if the hum is caused by ground loop. It cannot remove hum caused by pre-amp noise or something else so it is important to learn what is "ground loop" before buying this product.

Lo uso para distribuir señales de TimeCode LTC en grabaciones y funciona perfecto para esta aplicación, solo hay que elaborar correctamente los cables, no coloca ruido y la calidad de audio es buena.