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.

Using this in my main system. Signal path from Source to Preamp: Roon/Qobuz -> Roon Nucleus Plus (really an Intel NUC 7i7BNB in a superbly built case) -> JitterBug FMJ -> Audioquest Cinnamon USB A-C cable -> Matrix Audio Mini i Pro 3 streamer/DAC (used as a USB DAC in my setup). This feeds either a Naim SuperNait 3 + HiCap DR or a Line Magnetic LM512CA + LM503PA monoblocks. Both setups are very resolving and refined. The AQ JitterBug FMJ replaced an iFi iSilencer+ (cheaper at $49.95, also here on Amazon). Both devices bring obvious improvements in sound. Blacker backgrounds, more refined and airy treble, better sense of space. However, the JitterBug ups the ante with better treble clarity, more air, more sense of scale and space, more dynamic presentation across the board, and better tone colors. It also sounds a little better integrated in its presentation. Both devices are worth buying. Period. Very highly recommended if you are going to connect a computer or powerline network/wifi adapter in your system. I gave the iFi Silencer + 5 stars. I would give the JitterBug 6 if I could. Huge improvement for comparative pennies. Oh, and if you have an unresolving system, don't bother with this device. It will not fit cheap/bad components, quality power supply design, etc. don't be the guy who puts a K&N filter in their Civic and then complains about it not being a Corvette. That's not what this device is for.

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!!

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.

Vorab: Eigentlich schreibe ich keine Rezensionen, in diesem Fall tue ich es aber... Warum? Weil ich denke dass viele HIFI-Gleichgesinnte ähnliche Fragen und Gedanken zum Produkt haben, daher möchte ich meine Erfahrung teilen. Kurzvariante: In meiner Kette wirkt der Jitterbug phänomenal gut! Etwas mehr Kontext: Als ich erstmals vom Jitterbug gelesen hatte, dachte ich mir: OK, wieder so ein Hifi-Abrip! Als dann weiterführend stand, beste Ergebnisse erziele man mit einem zweiten JB, den man einfach nur "ungenutzt" in einen freien benachbarten USB-Slot schiebt, da konnte ich nur herzhaft lachen und dachte mir, eine noch dummdreistere Masche den Absatz zu steigern, habe ich ja noch nie gesehen. Meine Anlage besteht hauptsächlich aus Systemkomponenten aus dem hohen "Rega"-Regal. Das Set-Up ist hauptsächlich auf Analog/Vinyl ausgelegt, daher ist Digital-Audio bei mir nur zweite Garde. Dazu füttere ich den DAC (ebenfalls Rega) per Audirvana+ auf einem Mac-Mini, der seine FLACs übers NAS bekommt mit HiRes PCM. Wie gesagt, zuerst hatte ich den JB als Quatsch verbucht, aber es nagte an mir ... Schließlich dachte ich mir, lass einfach bei Amazon bestellen - 60 Euro ist im Vergleich zum Rest des Equipments ein Witz - und wenn es nichts bringt, geht es zurück... Tja, der Unterschied war sofort hörbar: Bässe sind präziser, VORALLEM aber habe ich ein deutlich räumlicheres Stereo-Bild, und viel präziser positionierte Instrumente, die räumlich nun noch besser von einander trennbar sind. Fast auf dem Level wie ich es von der Vinylkette in meinem Set-Up schon immer kannte. Ich erkläre es mir dadurch, dass der Mac-Mini natürlich kein Hifi-Streamer ist und wohl doch jede Menge Jitter in den DAC einstreut, gegen den der JB etwas ausrichten kann. Ich lese dass andere Käufer gar keinen Erfolg durch den JB haben. Ohne es zu wissen, wage ich einen Erklärungsversuch: Wenn ihr bereits einen High-End Streamer einsetzt, bringt der JB vermutlich nicht viel, da hier das Gerätedesign Jitter schon von Stunde null bekämpft. Wenn ihr aber wie ich in eurer Digital-Kette einen "Audio"-PC/Mac-Mini etc. nutzt, probiert es unbedingt aus. Ich möchte mein digitales Mac-Mini Set-Up aus diversen Gründen, genau so haben und behalten - in diesem Szenario bewirkt der JB großartiges! Meine Empfehlung: Ausprobieren und hören, wenn es nichts bringt, zurück damit.

Non costa poco, ma ne vale la pena. Suono più pieno e dettaglio migliorato. Parliamo di sfumature ma per chi contano sono importanti. Fonte file flac di buona incisione riprodotti da desktop Dell aziendale, certamente robusto ma senza materiali di pregio e ascolto in cuffia Ollo X1 tramite preamplificatore Douk P1plus