Audio Ground Loop Isolators Comparison: Cheap = Good?

Today im testing some ground loop isolators if they degrade the sound quality. I noticed cheaper ones cut off the lower frequencies quite a bit.

spectrum
direct: https://i.imgur.com/R0JZ0Z4.png
pollin: https://i.imgur.com/WXfknYQ.png
chinese: https://i.imgur.com/UmJMqL8.png
monacor: https://i.imgur.com/IuYAcgl.png

the ones im testing are:
pollin https://www.pollin.de/p/noise-suppressor-15-a-250403
cheap chinese https://www.ebay.de/itm/292246174427
monacor https://www.amazon.de/High-End-Massetrennfilter-Mantelstromfilter-Stereo-Line-%C3%9Cbertrager-Monacor/dp/B001RGXMF6

13 Comments

  1. Indrajit Mishra on February 1, 2021 at 6:27 pm

    Hi, Does a cheap ground loop isolator reduce the native sound quality of home audio equipments like an amplifier?



  2. Web Sime on February 1, 2021 at 6:27 pm

    Thanks for time making this video, Im using a Boss B25N for my subwoofer, do you know if this isolators will affect the subwoofer sound quality the same way as a common speaker?. Im currently using a Boss B25N for my sub and LFE channel.



  3. Helm Hurst on February 1, 2021 at 6:30 pm

    thank you



  4. Harun Karamuklu on February 1, 2021 at 6:31 pm

    İçini söküp transformatörleri göstermişsiniz. Teşekür ederim. İçlerinde nasıl bir coil var acaba? Primary secondary coil kaç tur sarılmış bobin? Keşke sarım sayılarını açıklasaydınız.



  5. Aaron Brown on February 1, 2021 at 6:38 pm

    Is there one on Amazon.com that is comparable to the Monacor? Especially, if it is used on home theater sub amps?



  6. Truth Purpose on February 1, 2021 at 6:39 pm

    Thanks you so much.



  7. Gilberto A. F. on February 1, 2021 at 6:40 pm

    RMAA



  8. Mitch Buch on February 1, 2021 at 6:42 pm

    You have to record ASMR videos :D.



  9. General Awareness on February 1, 2021 at 6:44 pm

    Home studio and DBX286s was noisy as hell when I hooked up the line out to my interface or to the line in on my PC. Unhook the line out and no noise YET the two devices were on the same strip (tried various strips) side by side. I even went so far as to pull them out of the strip and plug them into the same socket one on top of the other. What gives? Advice given was to remove the ground from the DBX286s since it is grounded to the PC that is grounded to the wall so only one ground is shared. The line out (TRS) is where they would share the ground. I don’t know of any way to eliminate this issue and I am even more stumped how two items sharing the same strip side by side would have this issue either.



  10. Blaze on February 1, 2021 at 6:45 pm

    My pc audio gets a high pitched constant squeal/hum whenever my monitor is plugged in. I separated the pc and speakers and monitor to different outlets in different rooms, no change, moving the transformer a reasonable distance away doesn’t seem to change it either. Adding in a ground loop isolator sorts the issue. Is this going to be the 3.5mm cables picking up interference as if they were antennas? The noise doesn’t happen with digital out, only with 3.5 which is needed for surround sound to work properly. idk if getting better cables would sort it without the need for an isolator. putting the isolator at the start or end of the cable doesn’t seem to matter though.



  11. gamerpaddy on February 1, 2021 at 6:47 pm

    Audio comparison timestamps:

    Direct: 12:09
    Pollin: 12:46
    Chinese: 13:18
    Monacor: 14:04
    4 chinese: 14:46
    All of them 15:37



  12. Aaron Brown on February 1, 2021 at 6:58 pm

    I see them on ebay. May be a better place. I had a weird hum lately being produced by some games. But the issue is sporratic. Sometimes I’d hear it, other times I may not. So I’m hoping the monacor will help. I have a cheap on called PAC SNI-1 coming so I’ll test that first. But I think in the end, the monacor should do a better job. I’m also checking with the plate amp manuf to see if they can replace mine as the issues started to happen before then 5 year warranty mark.



  13. 01234567 on February 1, 2021 at 7:11 pm

    Bought the cheapest 3.5mm generic chinese black box ground loop isolator on ebay and it works fine for me, does its job for 3 dollars.