--- product_id: 322511834 title: "JitterBug - FMJ USB Data & Power Noise Filter" brand: "audioquest" price: "547 zł" currency: PLN in_stock: true reviews_count: 8 category: "Audio Quest" url: https://www.desertcart.pl/products/322511834-jitterbug-fmj-usb-data-and-power-noise-filter store_origin: PL region: Poland --- # Meets USB 2.0 specs at 480 Mbps Dual noise dissipation circuits Full Metal Jacket shielding JitterBug - FMJ USB Data & Power Noise Filter **Brand:** audioquest **Price:** 547 zł **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound—ditch jitter, embrace clarity, and join the audiophile elite! ## Quick Answers - **What is this?** JitterBug - FMJ USB Data & Power Noise Filter by audioquest - **How much does it cost?** 547 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/322511834-jitterbug-fmj-usb-data-and-power-noise-filter) ## Best For - audioquest enthusiasts ## Why This Product - Trusted audioquest brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smooth Data Flow:** USB 2.0 certified with 480 Mbps transfer rate for seamless, jitter-free streaming. - • **Silence the Static:** Dual discrete noise filters slash internal RF interference for pristine audio clarity. - • **Armor Up Your Audio:** Full Metal Jacket casing blocks external noise, ensuring pure signal integrity. - • **Plug & Play Perfection:** Built-in RF resistant USB output jack enhances noise reduction without extra setup. - • **Audiophile’s Secret Weapon:** Transforms digital music with richer detail, wider soundstage, and zero background hiss. ## Overview The AudioQuest JitterBug FMJ is a USB noise filter designed to reduce radio frequency interference and jitter in digital audio signals. Featuring dual noise dissipation circuits and a full metal jacket for shielding, it meets USB 2.0 standards with 480 Mbps data transfer. This compact device enhances audio clarity, stereo separation, and soundstage by delivering a cleaner, more realistic listening experience for personal computers and compatible USB audio setups. ## Description desertcart.com: AudioQuest JitterBug - FMJ USB Data & Power Noise Filter : Electronics Review: Improves Sound Quality Substantially - 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. Review: It definitely works, however... - It's not snake oil. It works. I think some of the negative reviews are reacting to the fact that the Jitterbug seems to reduce the overall signal by a couple db. I can't really explain it technically. When it comes to digital signals I was always under the impression that a digital signal is either on or off, you get all the packets or you don't. I've used this with a Schiit Bifrost 2 and a Chord Mojo through couple different laptops, desktops, and phones. The unfiltered bitstream without the Jitterbug is louder and has some forward frequencies depending on the source/monitor. Some people no doubt find the straight bitstream more pleasing to their ear. If you listen closely, though, you might hear jitter/noise particularly around vocals and dialogue. You might not even notice it unless you can A/B test what you are hearing against a clean bitstream. The Jitterbug solves the noise issue. As best as I can explain, it reduces jitter/noise and either by design or as a byproduct of reducing jitter/noise, also flattens the frequency curve a bit. If you are using an amp/headphones/speakers that you like because they emphasize some particular frequency, you might have a negative initial reaction to the Jitterbug results. It might flatten the signal in a way you don't like. It's most definitely a cleaner signal, though, even on a DAC that's supposed to have an isolated USB input. If you use the Jitterbug, you'll either love it, have to learn to love it, or use an EQ to get the sound you want. I'm in the love it camp. ## Features - Dual discrete noise dissipation circuits reduce internally generated radio frequency noise to improve audio transmission performance - Reduces jitter and package errors - Full Metal Jacket protects against external noise - Built-in RF resistant USB output jack offers increased noise reduction - Meets all USB 2.0 specifications ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08YDFH63B | | Best Sellers Rank | #5,386 in USB Cables | | Brand | AudioQuest | | Brand Name | AudioQuest | | Cable Type | USB | | Color | Black red | | Compatible Devices | Personal Computer | | Compatible Phone Models | Probably compatible with smartphones, specific models not listed | | Connectivity Technology | USB | | Connector Gender | Male | | Connector Type | USB Type A | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.2 out of 5 stars 369 Reviews | | Data Transfer Rate | 480 Megabits Per Second | | Included Components | jitterbug | | Indoor Outdoor Usage | Indoor | | Item Shape | Round | | Item Type Name | consumer electronics | | Manufacturer | AudioQuest | | Maximum Voltage | 5 Volts (DC) | | Model | JITTERBUGFMJ | | Model Name | JitterBug FMJ | | Number of Items | 1 | | Number of Pins | 4 | | Other Special Features of the Product | Data Transfer | | Outer Material | Metal | | Recommended Uses For Product | Personal Computer | | Special Feature | Data Transfer | | Specification Met | USB-IF | | UPC | 092592016125 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** AudioQuest - **Cable Type:** USB - **Compatible Devices:** Personal Computer - **Connector Type:** USB Type A - **Special Feature:** Data Transfer ## Images ![JitterBug - FMJ USB Data & Power Noise Filter - Image 1](https://m.media-amazon.com/images/I/510vcjVP-PL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is it worth upgrading from the original jitterbug to the fmj?** A: I certainly wouldn't say you shouldn't upgrade, but if there's a difference in sound quality, it's so subtle that my ears can't detect it. **Q: I am using df red on my cell phone. would this improve sound quality of cell phone as a source, or is is mainly for reducing noisier pc sources?** A: I have the blue and it works great with my cell phone. Add some high quality noise cancelling headphones and you'll have a high end quality listening experience. **Q: Can the jitterbug be plugged to my bluray player usb port and improve my listening experience when I watch movies. I have a nice home theater set up.** A: If your USB on the DVD is a USB standard port then yes it will function. As far as improving your sound, the only thing that this thing does, as far as I know, is filter noise between devices. If your thing that needs improvement is a noise issue then this could help. If you have other issues you are trying to improve then this product is not likely to do anything for you. **Q: i have a cb radio on my motorcycle and get interferance when transmitting. will this help reduce this noise** A: i would say no. interference on your cb is most likely from the ignition system on your bike. make sure you have resister sparkplug wires and resister spark plugs. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Improves Sound Quality Substantially *by M***Y on June 20, 2024* 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. ### ⭐⭐⭐⭐ It definitely works, however... *by B***R on November 23, 2021* It's not snake oil. It works. I think some of the negative reviews are reacting to the fact that the Jitterbug seems to reduce the overall signal by a couple db. I can't really explain it technically. When it comes to digital signals I was always under the impression that a digital signal is either on or off, you get all the packets or you don't. I've used this with a Schiit Bifrost 2 and a Chord Mojo through couple different laptops, desktops, and phones. The unfiltered bitstream without the Jitterbug is louder and has some forward frequencies depending on the source/monitor. Some people no doubt find the straight bitstream more pleasing to their ear. If you listen closely, though, you might hear jitter/noise particularly around vocals and dialogue. You might not even notice it unless you can A/B test what you are hearing against a clean bitstream. The Jitterbug solves the noise issue. As best as I can explain, it reduces jitter/noise and either by design or as a byproduct of reducing jitter/noise, also flattens the frequency curve a bit. If you are using an amp/headphones/speakers that you like because they emphasize some particular frequency, you might have a negative initial reaction to the Jitterbug results. It might flatten the signal in a way you don't like. It's most definitely a cleaner signal, though, even on a DAC that's supposed to have an isolated USB input. If you use the Jitterbug, you'll either love it, have to learn to love it, or use an EQ to get the sound you want. I'm in the love it camp. ### ⭐⭐⭐⭐⭐ Does the job *by M***. on February 23, 2024* 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. ## Frequently Bought Together - AudioQuest JitterBug - FMJ USB Data & Power Noise Filter - AudioQuest Dragonfly Cobalt USB Digital-to-Analog Converter - AudioQuest DragonTail USB-A > USB-C High-Performance USB-A (Female) to USB-C (Male) Extender --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/322511834-jitterbug-fmj-usb-data-and-power-noise-filter](https://www.desertcart.pl/products/322511834-jitterbug-fmj-usb-data-and-power-noise-filter) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-11*