iFi SilentPower GND Defender - Intelligent Ground Control, IEC Connector Ground Loop Remover

I very rarely leave a review , but felt obliged to here. Have been struggling with ground loop issues for weeks and had tried many other solutions, none of which worked. This is definitely expensive for what it is and I was moaning about the price from ordering, right up until I plugged it in. Instantly not only was my subwoofer can silent, but bizarrely the coil whine from my pc has also disappeared!

I thought it would be £100 of snake oil. It's absolutely....not! It actually works. Fantastic! After months of work-arounds and wasted studio time, I bought this and stuck it on the back of my music production computer's power socket. Suddenly, the annoying static noise is gone! (Didn't do anything when I plugged it into my subwoofer, which feeds my studio speakers, so obviously it was my computer's ground loop causing the issue). My problem: static noise ranging from walkie-talkie type noise, to weird squeaking. Especially when launching applications or browsing the web. Any video related things would send it into overdrive. What I tried: Changing monitors. No difference. Plugging my audio equipment into it's own power strip. Nope. Using mains and not power strip. Nope. Using a powered audio interface...a bit of an improvement but NOT to the level that still won't drive you nuts. Changing audio interface. Whether I used a £200 or £1300 interface. Same issue. Using the clip-on wire things on ALL my equipment. Nope. Getting an electrician in. Interesting experience. But nope. I didn't expect this to work. But it did! Simple :) But what about the price then? I thought 4/5 due to the expense. I held off because of the expense and tried those ideas above. Overall...I've lost way more than that price in wasted time trying to find solutions and being utterly exhausted. So 5 stars for me!

They have quitened my system not completely removed the problem. But they do make the music sound slightly better

Whilst this is quiet an expensive item, it has proved immediately effective at resolving a ground loop audio issue with my desktop computer. Prior to this I had managed to resolve the noise (mouse movement, GPU hum etc) by running the computer via a UPS, however this was overkill and wasteful power wise. Given that the UPS worked when everything else had failed (moving power sockets, putting all audio on same power socket, grounding case to amp etc), I was fairly sure the iFi would fix it without a UPS. I did run a somewhat unsafe test with an ungrounded IEC lead (don't do this as a fix) and this resolved the issue so I ordered the iFi. I now have all the befits of noise isolation without a grounded lead but without the lost of protection as the iFi will kick in if there is a fault. I am not going to claim this will fix your ground loop or noise issues as it is a problematic issue to resolve that can have lots of causes but given the above this fixed it completely for me.

Didn't fully get rid of my buzzing sound and for that price its expensive.

Had a noticeable speaker hum when new unit connected to a Naim SuperNait 3 amp. Was assured this would do the trick and eliminate it. It didn't. Waste of money.

Hmm? Well I have had this dreaded hum which I was sure was coming from the computer and could be heard on all music mixes. After basically isolating everything else from leads, Interface, guitar, guitar effects, monitors. The culprit I believed was the PC and what I had I was sure was ground loop.. Now I saw this unit and its price and in a way a big step to take especially if you find out the noise is still there. So I took a chance thinking that if it doesn't work well I'll just return it get a refund.. So a couple of days before this arrives I have this switching noise now present almost like someone switching a light switch off or on. The hum was still present but seemed to be a lot more reduced.. So the unit turned up and was fitted, trouble is on this PC you have to keep shutting it down and then starting it back up again not a quick process. So the hum was still there, I compared it with or without never really made any difference to that, so the only other culprit is the interface but I'm not getting a USB version of this unit. However after saying all that some of the noises are gone, as well as that switching noise, but I don't think I've tried this unit long enough.. so will update this review when tests are completed. Thus far yes its good does the job, but I'm not convinced yet.. Longer session required.

Used to eliminate hum from my computer in my guitar rig Worked a treat, expensive but works really well

Good for hifi

I used the product on the master clock between the D/A and the transport, and it improved the sound quality.

La verdad es que va muy bien. Elimina Ground Loops

Perfect option for high end HiFi

Après avoir installé une mise à la terre sur mon arrivée secteur murale, pour la sécurité électrique, j'avais perdu environ 10db de puissance de mon ampli et perdu aussi bcp de graves. Image sonore bcp moins précise et détaillée. Bref c'était pas formidable mais je n'avais pas fait directement le lien avec la mise à la terre. D'autant qu'il n'y avait aucun bourdonnement, ronflette ou quoique ce soit. Après avoir lu un article parlant de la fuite de puissance et de message audio par les câbles de mise à la terre j'ai cherché une solution à ça, autre que de supprimer la mise à la terre. Et je suis tombé sur cette merveille qui coupe la terre mais la remet instantanément en cas de problème donc sécurité. Après quelques heures de rodage, graves revenus, détails et finesse, transparence et profondeur de nouveau. Super produit, le prix vaut le coup.