

🔊 Silence the buzz, amplify your vibe.
The iFi iDefender+ USB Audio Ground Loop Eliminator (Type A > A) is a precision-engineered device that reduces unwanted ground loop noise in your audio setup by disconnecting USB power grounds. Supporting USB 3.0 speeds, it preserves high-quality data transfer while enhancing audio clarity and dynamic range. With an optional 5V clean power input, it offers flexible noise filtration for USB-powered devices, making it an essential tool for audiophiles and professionals seeking a cleaner, more immersive sound experience.









| ASIN | B0849J33T9 |
| Best Sellers Rank | #2,967 in USB Cables #5,397 in Home Audio Accessories |
| Customer Reviews | 3.6 3.6 out of 5 stars (922) |
| Date First Available | January 28, 2020 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.233 ounces |
| Item model number | iDef+ |
| Manufacturer | Abbingdon Music Research |
| Product Dimensions | 5 x 3.6 x 0.6 inches |
N**U
Helped with white noise problem
Made a noticeable difference in the sound quality. I had been dealing with a heavy noise floor for a long time. Tried all the tips for solving ground loop issues and nothing worked. In my case it was what sounded like loud radio static on a dead station. I thought maybe I had a bad SM7B or interface and it was very frustrating. The mic and audio was always unusable due to a super heavy amount of white noise, more than you'd expect from a typical noise floor. This appears to have drastically lowered the noise. It isn't 100% but the audio is absolutely usable now compared to the hot trash I was dealing with prior. It's expensive for what feels like a fancy flash drive, but it was worth it in my case. The noise issue must've been something interfering from inside my PC, if you've done enough troubleshooting with ground loop noise and still have static and think it is your computer that might be the culprit, then this will likely help with your issue too. I also coupled this with a cable that had ferrite as well to further help with reduction.
M**H
Doesn't work well at all
I have attached 3 photos showing the line noise from a uac222. One with no usb ground eliminator and the other with the eliminator powered and not powered. Doesn't work well at all. I would have no problem if this was a ground noise reducer bevause then the product you are being sold would be accurate. This does NOT eliminate ground noise. It may reduce audible ground noise to a more acceptable level. Hoever this porduct by no means will elikinate ground loops. The frequencies if searched for can be easily found in a spectrum plotter tool. I have reported this losting to amazon as being inacurate. If you need to redice ground noise: then this is a good product for you. If you are looking to eliminate it as the product clearly states it will. This will simply not do that. And marketing the product as so is a somewhat dishonest dipictiin of yhis products capabilities. Please see attached images for reference and proof of function.
E**A
This thing sincerely works.
I have a Schiit Modi and Magni stack. They're attached to a system running an Nvidia RTX 3080 GPU, and whenever a game is running north of 60fps, the graphics card dumps so much electrical noise through my system that it becomes readily audible through the headphones or speakers I have attached to them at higher volumes. This happens even when absolutely nothing is attached to the PC other than the USB DAC - no external ground loops. It's a droning, grinding sound that is extremely obnoxious and changes in pitch based on what's being displayed. Just plugging the Modi in through this dongle (while keeping the modi itself powered by an external usb connection) cuts the electrical noise by roughly 90%, which is enough that I can't hear it in the slightest until pushing the headphones/speakers to unreasonable listening levels. Plugging a small external USB power supply to the iDefender+ itself (even the 5 volt 1 amp switching variety like what comes with most phones, for example) further reduces the noise at high volumes, until it's only just barely audible through a silent line at 100% maxed out volume. I can only assume some graphics cards cause an internal ground noise loop. Whatever the case, this little dongle does a terrific job of silencing the noise.
L**N
Does not work with all USB 2.0 devices
The iDefender+ us supposedly backward compatible with with USB 2.0, but I was unable to make it work with the USB 2 device that I intended to use it with. That might be because my device is an effects unit, not an audio interface and might therefore not be using the high-speed USB protocol, so it might work with other devices. YMMV. In addition testing, I was able to recognize 1 of 2 USB 3.0 hubs that I tried through the iDefender+ but it only appears as a USB 3.0 hub rather than as both a USB 3.0 hub and a USB 2.0 hub as it does when connected directly. It was not possible to use that hub as a workaround way to connect to my USB 2.0 device. Since I was not able to use the iDefender+ with my device, I cannot say for sure whether it would have solved my noise issue, though I can say that I had no noise whatsoever when it was connected (though not working) through the USB hub. When I connected a USB 3.0 thumb drive to that (which does work) I still had no noise so that is a good sign that it might do a good job of preventing noise if it worked for me.
J**N
Después de fabricar cables, buscar soluciones por internet sin éxito encontré este el dispositivo. La única solución después de años de búsqueda para el dichoso ruido ha salido la solución. Eso sí, debes comprar también el adaptador de corriente que vende la misma empresa, si no lo compras y lo pones no sirve de nada, pero ambos son la solución perfecta. En mi caso lo he puesto en el hub donde tengo todos los sintetizadores conectados por USB para la transferencia de datos midi entre los sintetizadores y mi Daw. Mano de santo estos Dos dispositivos en su conjunto siempre. Dejaros de cortar cables de corriente en los cables midi, las tomas de tierra, ni cables en Y fabricados ni por uno mismo ni comprados, ya lo he probado "todo" y por fin encontré la solución al problema que tenía y por supuesto no es una broma el problema, es un gran problema porque al componer y grabar tener el maldito ruido no es poca cosa.
D**.
Ich nutze Yamaha HS7 als PC Lautsprecher. Fürs Zocken, Filme schauen und so weiter. Also keine studiotechnischen Anwendungen. Angeschlossen sind diese an einem Audio Interface, dem Steinberg UR22C. Das Ergebnis ist wirklich gut, kein Rauschen, Summen etc. WICHTIG! - Unbedingt ein passendes Netzteil [5V/2,5A] verwenden. - WICHTIG! Hatte den iFi iDefender+ per USB-C auf USB-A Kabel direkt an der Stromleiste angeschlossen oder wahlweise mit einem anderen Netzteil (Amazon Alexa-Echo-Dot Netzteil, Samsung Charger). Es muss nach meiner Erfahrung nicht das iFi iPower2 sein. Habe ein Netzteil [5V/2,5A] für 15€ inkl. Kabel beim Elektrofachhandel gekauft und das Ergebnis ist nochmal besser als zuvor. Das Behringer MicroHD HD400 wird nun NICHT mehr mit genutzt. ///Alte Bewertung: Allerdings gab es je nach Anwendung - Knistern / Rauschen bei Mausbewegungen - Knistern / Summen bei Downloads - Knistern / Summen / Rauschen bei Arbeit in grafikintensiver Software / oder Videogames Einmal den kompletten Raum auf den Kopf gestellt und versucht die "Störquelle" zu finden. Neue Kabel, alles. Bis ich den iFi iDefender+ (Typ A bis A) bestellt und angeschlossen habe. Knistern und Rauschen sind deutlich besser geworden, jedoch nicht zu 100% verschwunden. Daher hatte ich lange überlegt die dazugehörigen Netzteile zum iFi iDefender+ dazu zu bestellen. Bei der Recherche bin ich jedoch auf das Behringer MicroHD HD400 aufmerksam geworden. Die Störgeräusche sind nun völlig auf 0. Meine Empfehlung liegt daher ganz klar erst das Behringer MicroHD HD400 zu testen da es deutlich preiswerter ist und passiv eine deutliche Verbesserung bewirkt. Sollte das nicht ausreichen, kann immer noch mit einem iFi iDefender+ nachgeholfen werden. Erdungsschleife hin oder her, das Rauschen auf den Lautsprechern/USB Interface ist nun Geschichte!///
A**S
مناسب للكمبيوتر
S**E
Ayant récemment remplacé tout mon materiel de MAO (Tour PC, carte son...) par du tout frais, je me suis heurté aux problèmes que beaucoup rencontrent: buzz, interférences... une horreur quoi. J'ai tout tenté (utilisation de jacks symétriques, placements des cables audio par rapport aux alimentations.....) sans succès... J'ai identifié une boucle de masse générée par mon préampli guitare externe connecté sur ma carte son, et dont l'alim est sur le même réseau électrique que le reste de mon materiel, mais buzz et interférences étaient toujours bien présents. Je n'avais jamais rencontré ces soucis avec ma config précédente, que j'utilisais depuis plus de quinze ans. Après pas mal de recherches, je me suis décidé à tenter cet isolateur USB car tout me menait vers cette option... Et bien gagné !!!!!! Plus le moindre souffle, pas de buzz, pas une interférence, le silence absolu !!! Certes, ce petit isolateur est assez couteux, mais franchement impossible de s'en passer lorsque on rencontre ces problèmes. Ma config est la suivante: - tour PC type "Gamer" bien puissante, mais naturellement source d'interférences pour de la MAO (ventilateurs, carte graphique, wifi...) - Interface audio Steinberg UR242 (du coup pluggée sur l'isolateur en entrée usb du PC) - Processeur externe guitare Avid Eleven Rack - Plug-in guitare Bias FX2 de chez Positive Grid sur PC - routage de la carte son et du processeur guitare via une petite mixette analogique Behringer (de manière à pouvoir utiliser l'eleven rack pour jouer sans avoir à allumer le PC) - Enceintes de monitoring Samson Resolv 40A en sortie de la console - Cubase 11 pour l'enregistrement - Clavier Nektar Panorama T4 pour le pilotage de Cubase et le jeu sur des instruments virtuels Tout ce petit monde cohabite maintenant dans la paix et l'harmonie :-) Précision importante: l'isolateur doit être impérativement alimenté (même si la carte son à elle aussi sa propre alimentation électrique) via son connecteur USB C (perso j'utilise mon chargeur de téléphone, peut être en achèterais-je un dédié...) Je souhaite que ce petit isolateur fonctionne bien dans la durée parce qu'il reste quand même assez cher... J'ajusterais mon commentaire si je constate quoi que ce soit qui cloche. J'espère que mon avis pourra aider ! et... mort aux buzz !!!!!
V**D
Its do nothing
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