AudioQuest JitterBug FMJ Data & Power Noise Filter

Item code: JITTERBUGFMJ

4.1 13 reviews ✓ Verified
The new 'Full-Metal-Jacket' upgrade to the already excellent Jitterbug helps to further reduce RF noise generated from your USB connected device, such as computers, laptops, mobile devices and even cars! The two obvious changes are the outer metal ca…
£59.00
£49.17
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Qty:

SPEAKER CABLES:

A quantity of 2 means you will receive a pair of speaker cables e.g. for your front left and front right speakers. By entering a quantity of 1, you will get a cable for a single speaker e.g. centre speaker and this option also enables you to vary the length (and termination) of your cable for each speaker.

OTHER CABLES:

A quantity of 1 means you will receive a single cable in the case of aerial, satellite, subwoofer, digital coaxial & optical cables and a pair of cables in the case of 2 rca to 2 rca analogue audio cables.

NON-CABLE PRODUCTS:

A quantity of 1 means you will receive 1 of the specified products.

£49.17 ex. VAT
Available — built to order, dispatches in 2 - 3 Weeks
Delivery: Royal Mail Tracked 24  ·  DPD Next Day from £8.95  ·  DPD Saturday from £12.95
Order before 4pm (Mon–Fri) for same-day dispatch
Our promise: 30-day returns · Free burn-in · Built in our UK workshop · Lifetime warranty · Expert support on every order

AudioQuest JitterBug FMJ Data & Power Noise Filter

 

The new 'Full-Metal-Jacket' upgrade to the already excellent Jitterbug helps to further reduce RF noise generated from your USB connected device, such as computers, laptops, mobile devices and even cars! The two obvious changes are the outer metal case and the new hinged cover on the female USB A side of the Jitterbug. This new cover is made from a unique material based on carbon which has incredible RF-absorbing properties. This means that if you use the Jitterbug as a standalone connection in your equipment, the improvements for reducing RF Noise are even greater!

Here's what AudioQuest Say:

Many tens of thousands of music lovers are already enjoying better audio enabled by the original AudioQuest JitterBug USB Noise Filter—plugged into cars’ USB jacks, laptop computers, USB “service-only” jacks on Ethernet Streamers, and more. Now, JitterBug FMJ, with its Full Metal Jacket raises the stakes even higher.

Whether used in series (in-line) or in parallel, JitterBug significantly reduces contamination from RF generated by a computer, car, or any other device—JitterBug FMJ also thoroughly addresses environmental RF Noise taking advantage of this vulnerable interface.

 

Features

  • Dual-Discrete Noise-Dissipation Circuits reduce internally generated radio-frequency noise for improved streaming-audio performance
  • Reduces jitter and packet errors
  • Full-Metal Jacket (FMJ) protects against external noise
  • Integrated RF-proof USB output plug further reduces noise
  • Complies with all USB 2.0 specifications

 

The new metal case is the most obvious change, though even the seemingly innocuous hinged “rubber” piece covering JitterBug’s output is crucial to JitterBug’s improved performance. That little black “door” is RF-proof thanks to the material being substantially RF-absorbing Carbon.

Employ one JitterBug in series between any computer, smartphone, NAS, streamer, or car audio system and a USB input. For an additional sonic improvement, use a second JitterBug in another unoccupied USB port—in parallel to the first—except with JitterBug FMJ’s front door closed.

A JitterBug in series with AudioQuest DragonFlys Black or Red always helps those wonderful creatures fly higher and faster. However, it’s best to experiment when putting a JitterBug in front of a DragonFly Cobalt—which itself employs some of JitterBug’s filtering, and so the two filters in series can help or hurt performance depending on specific equipment and context.

Regardless of which DragonFly or any other considerations, a 2nd JitterBug in parallel is always a delightful improvement as it pulls more RF Noise off the USB power bus—which is why and how a JitterBug makes just as big an improvement even when plugged into service-only or update-only USB ports on many devices.

Noise reduction and noise dissipation is AudioQuest! One can’t hear the modern world’s pervasive RF Noise itself, but the compromises it causes robs you of detail, contrast and outright buries so much subtlety. Fight back with JitterBug FMJ.

 

Specification :

  • For use in series (inline) with any computer and USB DAC (digital-to-analog converter)
  • For use with computer peripherals, mobile phones and media devices, and network streaming and storage devices
  • Reduces the noise and ringing that plague both the data and power lines of USB ports
  • Measurably reduces jitter and packet errors
  • Improves dynamic contrast, warmth, and resolution

 

About AudioQuest

AudioQuest has been the largest cable supplier to the high-end specialist market for many years. AudioQuest is sold in several hundred outlets in the US and in over sixty countries. Bill Lowe (Founder) is especially pleased that this success has been possible despite his insistence that the foundation of the company, and the foundation of AudioQuest marketing, must be the performance of the product. In the audio world, many professionals have learned that it is not always convenient to listen to the products they sell … they might learn something they don’t want to know! Bill has always understood the challenge of basing the existence of AudioQuest on the performance of the product. However, to Bill, this is the only reasonable way to do business and the only acceptable way to combine his passion for music (and all things high performance), with his need to make a living.

About AudioQuest

Californian cable maker covering analogue, digital, speaker and power cables, with patented conductor and dielectric designs.

AudioQuest is based in Irvine, California, and makes cables for nearly every connection in a system: analogue interconnects, USB, HDMI and Ethernet, speaker cables and AC power cables. Its designs come back to four ideas: solid conductors, directionality, noise dissipation and the quality of the metal.

Read more about AudioQuest Show less

Conductor and metal choices come first

Solid conductors and metal quality are two of the ideas AudioQuest returns to across its range. HyperLitz, a conductor construction patented in 1988, is another. Directionality, the principle that a cable is built to carry signal in one direction, is the fourth.

Noise is treated as a separate design problem

AudioQuest lists its noise-dissipation technologies as ZERO-Tech, RF/ND-Tech and the Dielectric-Bias System, which was patented in 2004. They are applied alongside the conductor work rather than in place of it, and which ones a cable carries depends on the model and its price.

One brand across the whole system

AudioQuest also makes AC power cables, Niagara and PowerQuest power conditioners and DragonFly DACs alongside its analogue, digital and speaker cables. If you are building or upgrading a system, that means every cable in the chain, and the power feeding it, can come from one design approach.

Why we stock AudioQuest

We took AudioQuest on for HDMI. When the 1.4 spec arrived in 2009 they were the first supplier who could actually get the cables to us, at a point when almost nobody could. The power cables turned out to be just as good, and they are now a bigger part of what we sell than the HDMI ever was.

Shop all AudioQuest →

Specification :

  • For use in series (inline) with any computer and USB DAC (digital-to-analog converter)
  • For use with computer peripherals, mobile phones and media devices, and network streaming and storage devices
  • Reduces the noise and ringing that plague both the data and power lines of USB ports
  • Measurably reduces jitter and packet errors
  • Improves dynamic contrast, warmth, and resolution

We use Royal Mail 1st Class services for our Standard Delivery.

Orders received before 4.30 pm Monday to Friday are usually dispatched the same day by FIRST CLASS post (unless premium postal or timed courier services are selected), subject to stock availability. This does not apply to custom-length cables and speaker cables as these require a longer timescale to terminate. This also excludes all cables selected for the burn-in service. Please note, we do not process orders on national holidays in the UK. Over 98% of our orders are delivered the next working day including Saturdays.

 

Standard delivery is usually within 2 working days, although 98% of all orders are delivered the next working day including Saturdays. In extreme cases, such as delivery to the Highlands and Islands, this may take 3 days.

 

All items are fully insured and come with an invoice from Future Shop. We use the Royal Mail for delivery of small packages and DPD Local or DHL for items that weigh over 2KG. Items over 2KG are fully insured and will usually be delivered within 48 hours of placing your order subject to stock availability. For international orders, we use FedEx or DHL services where customers have selected this option.

 

 

Please note, special orders for non-standard cable lengths may be subject to longer deliver time-scales. This may vary from manufacturer to manufacturer.

 

We offer 'Free delivery on orders over £99' subject to the following terms & conditions:

  • Applies only to orders with £99 or more of items (including VAT at the UK rate), at Future Shop
  • Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK (excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL).
  • Applies only to deliveries to addresses within mainland UK and Northern Ireland addresses. Applies only to orders that are to be delivered to a single Mainland UK delivery address.
  • You will not be eligible for free delivery on your order if any items are cancelled or returned for a refund, bringing the total order amount below £99. Where items are returned, the refund due will be the cost of the item less any postage costs.
  • We reserve the right to change or discontinue 'Free delivery on orders over £99 promotion at any time.
  • FREE DELIVERY FOR ORDERS OVER £99 OFFER DOES NOT APPLY TO TRADE CUSTOMERS.

 

UK Postal & Delivery Charges - FIRST CLASS

Free UK delivery on all orders over £99*

Weight Price (FIRST CLASS UK POSTAGE)
0g - 1000g £3.95
1000g - 1400g £4.95
1400g - 1800g £5.95
1800g - 2000g £6.95
2000g - 3000g £8.95


* Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK.

Free Delivery for orders over £99 excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL.

 

Special Delivery UK - Guaranteed Next Working Day

We have 99.9% of the UK covered With Royal Mail Next Day Special Delivery. We guarantee delivery to most UK addresses by 1pm the next working day. This includes Northern Ireland, Jersey and Guernsey. Some places take longer to deliver to but we still guarantee delivery within three working days by 5.30 PM.

 

Please note, Royal Mail Special Delivery for next working day may not be possible where non-standard cable lengths are ordered. If this is the case, the item will be shipped via The Royal Mail Special Delivery service as soon as the cable is custom made.

 

For orders weighing over 2KG, we reserve the right to ship items using Next Day Pre-Noon Courier Services where Royal Mail Special Delivery option has been selected.

 

Channel Islands & Northern Ireland

We accept orders from all Channel Islands including Alderney, Jersey, Guernsey and Sark. Unless you select a premium service, Items weighing under 2KG are delivered using our standard UK delivery option above. For items weighing over 2KG, a surcharge may be applied for all deliveries to the Channel Islands as well as Northern Ireland.

 

European Countries

Deliveries to EU member states are not subject to 20% VAT after December 31st 2020 and therefore the 20% VAT on items is automatically deducted when you log-in, register or proceed to place an order.

 

The customer will be liable for the VAT at the local VAT rate, duty on the import and the brokerage service fee if applicable. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.

 

We offer the following shipping services:

  • Royal Mail First Class International Airmail Services - Items are usually delivered within 3 to 5 working days
  • Royal Mail Standard International Mail Services - Items are usually delivered within 7-10 working days
  • DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
  • Federal Express International Priority - Items are usually delivered within 24 to 48 hours. FedEx orders must be received by 3.00pm for next day service to most destinations in Europe
  • Federal Express International Economy - Item are usually delivered within 48 to 72 hours

We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.

 

Worldwide - Excluding UK & Europe

Deliveries outside of the UK are not subject to 20% VAT and so the 20% tax on items is automatically deducted when you log-in, register or proceed to place an order.

 

If applicable, the customer will be liable for the taxes at the local tax rate, duty on the import and the brokerage service fee. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.

 

We offer the following shipping services:

  • Royal Mail First Class International Airmail Services - Items are usually delivered within 7 to 10 working days
  • Royal Mail Standard International Mail Services - Items are usually delivered within 15 working days
  • DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
  • Federal Express International Priority - Items are usually delivered within 48 hours. FedEx orders must be received by 3.00pm in order to ship items the same day, subject to stock availability
  • Where the actual weight of the package significantly exceeds the shipping cost charged on orders, we may write to you for an additional shipping charge. For larger orders, items may be shipped in multiple packets at our discretion

We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.

Write Your Own Review

AudioQuest JitterBug FMJ Data & Power Noise Filter

We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.

Please do:

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4.1
13 reviews
5★
7 (54%)
4★
1 (8%)
3★
4 (31%)
2★
1 (8%)
1★
0 (0%)
AI Review Summary — Generated from 13 Reviews

Customer opinions on the Audioquest Jitterbug FMJ are sharply divided. Enthusiasts report noticeable improvements in sound clarity, soundstage depth, and detail, particularly when used with high-quality audio systems, and praise the product's affordable price relative to cable upgrades. However, skeptics and some users detected minimal or no audible difference, with a few experiencing degraded sound quality or technical compatibility issues with certain devices. Multiple reviewers note that results may depend on system setup quality and cable type used. All reviewers commended FutureShop's service and return policy. A significant recurring negative theme is that the product fails to deliver promised benefits for many users, with some questioning its value proposition.

Luigi I ✓ Verified Purchase
Review of Audioquest Jitterbug 24 March 2026
I purchased this to use alongside my Audioquest USB cables - to be fair, I cannot see any difference thus far, but it's early days. I like to think I use a good-quality setup, so maybe it can't improve upon what I have. It may be more worthwhile with a No-brand USB cable - I use it to connect a Portable HDD to my Blu-ray player/recorder. I will continue to test this, maybe on my PC, to see if there is a difference. Future Shop's delivery and service are still great.
LM ian ✓ Verified Purchase
Audioquest Jitterbug FMJ 23 March 2026
I am still testing out this new device - have tested with Blu-ray player connected to a portable HDD (with Audioquest USB cable in the mix) and directly connected to my laptop. I can't say for certain if I have seen or heard any improvement.

I have other Audioquest HDMI and USB cables where I can see and hear the differences those make. But still haven't found so far any differences the Jitterbug makes - perhaps there will be a difference if I use a cheap, no-brand USB cable with Jitterbug.

It's early days, and I may see over time improvements that this will make. My set-up has (in my opinion) good-quality components, so any improvements will likely be small and hard to see. may update this review in time.
J Haskell ✓ Verified Purchase
Marginal improvement at best 20 September 2024
Recommended by a friend, the price at Futureshop was good, so I bought two for use with my laptop streaming to my DAC. Tried one in line - sounded worse, muddied things. Tried two, with one in second USB socket as suggested - no better. Tried one JUST in parallel USB socket, slightly 'softened' sound. I wouldn't say even then it 's an improvement but on some harsh recordings it took the edge off so I've kept one, but most of the time I am using the system without it as it's still seems to lose detail & openness. I think it's basically snake oil, though!

I have no complaints about Futureshop price delivery & refund policy, though - all excellent!
Response from Future Shop
Thank you for sharing your honest feedback. We’re sorry that the Jitterbug didn’t quite meet your expectations. It's interesting how certain products can have different effects depending on the system and personal preferences, so we appreciate you thoroughly trying it in various configurations.

That said, we're glad you're happy with our pricing, delivery, and refund policy. If there’s anything else we can assist you with, or if you’re looking for alternative solutions to improve your sound, feel free to reach out. We're always here to help.
David Temple ✓ Verified Purchase
Significant difference at low cost 26 August 2024
This particular product is treated with scepticism by some and with enthusiasm by others. I fall into the latter group as I feel it has cleaned up the sound, making everything clearer and the silences more silent.

It also seemed to increase the depth of field. In truth, compared with all other high-end audiophile equipment, this is so inexpensive that it is worth trying out—you have nothing to lose. The difference for me was clear.
Kim Butcher ✓ Verified Purchase
Just what I needed 15 August 2024
I read positive reviews, so I took a chance. I noticed the significant improvement immediately—substantially greater resolution and focus.

I bought a second for another system.
Richard Peace ✓ Verified Purchase
Superb! 28 April 2024
I read previous reviews and have another AudioQuest kit, which is very impressive, so I purchased and...wow...I cannot believe the difference it's made to the sound stage.

I highly recommend it.

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Write Your Own Review

AudioQuest JitterBug FMJ Data & Power Noise Filter

We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.

Please do:

  • - Write 50-300 words for the product
  • - Comment on the products value and effectiveness
  • - Tell us if you like the product, but most importantly explain why you like or dislike it
  • - Mention related products and how this one rates by comparison
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