AudioQuest - Jitterbug FMJ USB Data & Power Noise Filter

I am 60 years old and have been an audiophile for 50. Always trying to improve the sound quality of my audio system. Although I never went crazy and purchased audio equipment in the 10K+ range, I have heard many hours of what expensive audio sounds like. I have found most of it out there is snake oil, but every once in a decade or so, you find a diamond worth it’s value. The JitterBug FMJ is a diamond, not snake oil. It really works. I’d actually pay 10x its value for what it does. It improved the sound of my digital music 25%-50%, along with an AudioQuest (Cinnamon) USB cable, a computer/music server, a DAC with a Saber chip and a Vac-Tube Amp. I have yet to compare headphone sound quality. Everything musical has: more stereo separation, clarity and imaging detail along all frequencies more realistic and open sounding (out of the speaker box sound) a little more soundstage (surrounding sound outside the speaker edges) most all Music Genres sounds more balanced and open Musical Instruments will have: more analog sounding realism, while still retaining its digital sharpness less digital jitter and muddiness (its most noticeable feature) string vibration- can be heard more (guitar, piano) percussion- is clearer and stands out more voices- have more authentic raspiness and realism Synthesized Waveforms- you will hear more- wobble during smooth wavy sequences graininess during distorted sequences You will also get Black as Pitch quite parts, with zero background noise. Your music collection will sound noticeably different…better.

I bought this to use in my Ford Explorer 2013 Limited with Premium Stereo. I upgraded my system to a Sync 3, changed all of the speakers and tweeters to Infinity Kappas, kept the OEM amp, and downloaded my music to Lossless files. I wanted to make sure I was getting the best sound, I wasn't hearing interference, or hums only it was hard to bare when playing the music loud due to the treble and bass, vocals sounding out of place, I just felt that this could improve the sound. And it did, I upgraded the iPod wire to an audiophile cord, connected this and it made a major difference. The Bass was tighter, the treble was calm and not over bearing, the mids finally matched up well. I did many comparisons with and without it, and I have no doubt in my mind and ears that it made a difference. I'm an audiophile, well anyone that mentions lossless files has to be 😂 Will someone who uses mp3's notice a major difference, maybe not. But this indeed made a major difference to me. It was worth it.... No, the seller I originally bought this from shipped it without placing it in an Amazon bag or box, so my first one was stolen from the box. Had to get another one, so be careful from which seller you buy this from. Other than that, it was worth it

I bought this unit because I thought it would lift the ground using separate power, and so clear up video interference in the power amplifier caused by a ground loop in the audio interface USB connection. It didn't. The headphone audio doesn't use the power amp connection, though, so it's very clean.

Full disclosure, I was on the fence about this product for a long time. The Internet is full of back-and-forth debates on whether it does anything. My best advice is, everyone's situation and issue is different - try it without any prior expectations and return it if it didn't help. This solved an unstable-handshake issue I encountered with a high-end DAC (AudioGD R27-RE) connected to my PC that's physically quiet but spews electrical noise. The DAC was unable to decode any PCM streams with >48kHz sample rate until I added this to the chain. In the past solving this kind of issue would have required a full digital interface unit with galvanic isolation between the input and output ports, or changing the connection to Toslink (which can present its own issues because it adds electrical/optical conversion steps using mass-market components). I won't share my personal opinion regarding changes this made to my music quality. If the result of suppressing noise and jitter is your DAC getting a clean digital stream that decodes more accurately to the original encoded sound, then yes, the signature can change. But there are many factors involved in this that determine whether any difference will be audible.

I do audio mastering. I just got a new computer and I have migrated my work to it. The computer generated noise floor increased on on my audio interface to a level that was detectable. I could handicap the system by gain staging things differently but that meant that my two sets of monitors had slightly different levels when switching from monitor A to monitor B. So I thought I'd try this computer band-aid. It worked. The computers audio noise floor dropped to a point that is lower than the one my old system exhibited. I'm not going to measure the drop in quantization trash coming through the sound system but a good guess is between 2 and 3 db. Well worth the money.

Does not help computer noise/ground loops at all. Not even a dent. Computer noise /ground loop buzzing still bled through my speakers at full force. If you're looking for a solution to the computer noise buzzing (you can hear your mouse generating noise), try the iFi iDefender. Should be about $80-90, but it dramatically reduced the noise. There was still SOME noise, so I also used the iFi GND defender and I now have perfectly clear sound. Now it does say it's meant for RF signal interference so that might be why. They should show examples of what exactly a user should be experiencing without it since the description seems like it could be a catch-all.

2020 imac into Marantz hd amp1 into dynaudio emit 20 speakers. Wireworld usb and audioquest speaker cables. PS audio powerport. Tidal streaming. Positives: There was a decrease of high end harsh peaks with low quality recordings. Resolution and detail of the music improved slightly. There seemed to be more ‘air’ around mostly the vocals and the midrange. Negatives: The highs are blunted so there was a loss of edge, or aggressiveness to tracks. There is a loss of dynamics in the overall sound. Tracks sounded more attenuated or compressed. Loss of bass and bass detail was very pronounced. My system needs all the bass it can get, since I don't use a sub. And this unit tightened and reduced the bass in a very unpleasant way. This was the biggest reason I did not like this product. In terms of reducing high end peaks or harshness, just repositioning the speakers was more effective for me. The IFI silencer I tried as well, and that compresses the the sound even more. Dynamics, punch suffer even more with that unit.

This device may be slightly more expensive than similar devices but the quality is excellent. It definitely remove jitter & other "noise" from a laptop, especially if you stream music or listen to music files from an SSD connected to your laptop. In fact, I bought an additional device as recommended by AudioQuest and the sound quality is much better and "cleaner". I highly recommend this device to high end audiophiles but if the quality of you sound system is not high-end or if you listen to compressed audio files, I suggest that you do not to buy this device as you may not hear any difference in the sound quality

Le AudioQuest JitterBug FMJ est un produit essentiel et exceptionnel pour relier vos appareils électroniques iPhone ipad iPod à votre amplificateur ou à votre lecteur CD. Je l'utilise pour filtrer les jitters de mon iPhone branché à mon Marantz CD6005 via un cable AudioQuest Cinnamon lightning-USB. Le Marantz possède une entrée USB pour profiter de son excellent DAC. Avant de placer le JitterBug entre mon Cinnamon et mon Marantz, le son était excellent grâce encore une fois à l'excellent DAC du Marantz CD6005 et à l'excellent cable AudioQuest Cinnamon. Depuis l'installation du JitterBug, je dois dire que nous sommes dans une autre dimension sonore. Les timbres des différents instruments s'enrichissent substantiellement, la scène sonore se précise davantage étant donné l'impact du filtre JitterBug sur tous les aspects qui concernent la musicalité. Les basses présentent un impact supérieur, les hautes fréquences restent précises et prononcées s'il y a lieu avec moins de tendance à déborder. Bel équilibre sonore et douceur dans un gant de fer solide. Les médiums ne sont pas en reste et s'épanouissent splendidement. Bref ce filtre garde intact la musique et les qualités sonores et musicales de vos appareils en enlevant simplement et efficacement les parasites et jitters qui occasionnaient avant quelques désagréments à l'écoute. Tout sonne plus juste... Courrez vous procurer ce produit si vous utiliser des appareils électroniques pour accéder à votre musique. Pour ma part, je redécouvre en quelque sorte une joie renouvelée à faire du streaming via l'application Tidal. En résumé... Plus de définition Plus de transparence Plus de solidité et de maîtrise des différents registres Plus de précision Pus de détails font surface Plus de profondeur Timbres encore plus fidèles Bref plus de musicalité

I was skeptical at first, lots of mixed emotions for these, but these absolute make a difference for car audio. It is likely that for home amplifiers these make minimal/not noticeable differences, but for car audio with lower quality components and lower quality amps, especially as vehicles usually have noise/hiss or ground loop issues, this has really helped my setup to sound need factory with an aftermarket android unit for my CLA45 AMG. For anybody else interested, I’m running a 12” Android head unit from AliExpress - had hissing/high pitch interference - i have installed this jitterbug for the Aux to USB converter that is provided to get audio for NTG 5.0 systems, along with a Aux to Aux ground loop isolator and some ferrite filters along the cables - and damn! This setup has made the audio quality near perfect!! (I also tested the same setup without the JitterBug, and you can still hear very minor hissing/high pitch at high volume without this plugged in…. The jitterbug has cleaned this up for me!! Very happy i found this!!

Used in front of AudioQuest Dragonfly Red. Clarified 11yo laptop's sound.

Un petit accessoire pas trop cher qui apporte réellement un plus. Je le recommande chaudement.

Mycket nöjd. Tar egentligen inte bort jitter men väl andra störningar. Hörbar förbättring.