Get insider access
Preferred store
Your browser is not supported or outdated so some features of the site might not be available.
We've recently released our Test Bench 1.7 update for Headphones! Read the Noise isolation R&D Article to learn more.

Jaybird X4 Wireless Headphones Review

Tested using Methodology v1.4
Reviewed Oct 29, 2018 at 10:04 am
Latest change: Writing modified Sep 27, 2021 at 02:03 pm
Jaybird X4 Wireless Picture
Mixed Usage
Neutral Sound
Wireless Gaming
Wired Gaming
Phone Calls

The Jaybird X4 Wireless are great wireless sports in-ears that are versatile for everyday casual use. They block a decent amount of noise and barely leak. They're stable for most sports and portable enough to fit in your pockets. You can customize your sound to your liking with the MySound app, and they have decent battery life. They're very similar to the Jaybird X3 Wireless, slightly outperforming them for sound, but they keep relatively the same design.

Our Verdict

7.1 Mixed Usage

The Jaybird X4 are decent for mixed usage. They're versatile enough for everyday use. They're a good-sounding pair of headphones that are more comfortable than the previous Jaybird X3 Wireless. Unfortunately, they're in-ears, which might not fit everyone. They block a decent amount of ambient noise but barely leak. You also don’t need to worry about a wire getting in your way every day since they're wireless. They should also last you a good part of the day, thanks to their decent battery life.

  • Minimal leakage.
  • Stable and portable design.
  • Above average and customizable sound.
  • The in-ear fit is uncomfortable for some.
  • Cumbersome charging cradle.
6.9 Neutral Sound

The Jaybird X4 are alright for neutral sound. They have decently balanced sound with a bit of overemphasized bass, great for bass-heavy genres. Like most in-ears, they have poor soundstage. On the upside, they're comfortable and sound good enough for casual listening. They also have an EQ, so you can adjust the sound profile to your liking.

7.4 Commute/Travel

The Jaybird X4 are decent for commuting. They isolate a decent amount of noise, and you can reduce ambient sound by listening to higher volumes thanks to their low leakage. They're decently comfortable for short trips like a bus ride, but in-ears might not be the best choice for longer trips like a flight. On the upside, the wireless in-ear design makes them very portable, and you can easily store them in your pockets or a bag.

8.0 Sports/Fitness

The Jaybird X4 are great sports headphones. The different tips and stability fins options will let you find the most comfortable and stable fit for your activities. The in-line remote didn’t change from the Jaybird X3 Wireless model and still have a simple control scheme. Being wireless, you won’t have a wire in your way during your workouts. They're also compact enough to fit in your pockets, even when in their carrying pouch.

6.9 Office

The Jaybird X4 are fair for office use. They have good isolation performance. They block a decent amount of ambient noise and barely leak, so you can mask more noise by raising your audio volume. Unfortunately, the fit is probably not comfortable enough for a full day of work. The battery life might also be too short for a whole shift.

5.6 Wireless Gaming

The Jaybird X4 are sub-par for gaming. They have an average microphone but too much latency to use for gaming.

5.5 Wired Gaming
6.8 Phone Calls
  • 7.1 Mixed Usage
  • 6.9 Neutral Sound
  • 7.4 Commute/Travel
  • 8.0 Sports/Fitness
  • 6.9 Office
  • 5.6 Wireless Gaming
  • 5.5 Wired Gaming
  • 6.8 Phone Calls
  1. Updated Feb 20, 2020: Converted to Test Bench 1.4.
  2. Updated Nov 21, 2019: Converted to Test Bench 1.3.1.
  3. Updated Nov 21, 2019: Converted to Test Bench 1.3.
  4. Updated Oct 29, 2018: Review published.
  5. Updated Oct 27, 2018: Our testers have started testing this product.
  6. Updated Oct 25, 2018: The product has arrived in our lab, and our testers will start evaluating it soon.
  7. Updated Oct 22, 2018: We've purchased the product and are waiting for it to arrive in our lab.

Compared To Other Headphones

Comparison picture

The Jaybird X4 are good wireless sports in-ears, but they're versatile enough for everyday casual usage. Their sound quality is good for in-ears, and they have a comfortable in-ear fit that doesn't enter your ear canals deeply. The IPX7 rating is great for sports users who don’t want their headphones damaged from water exposure. Unfortunately, their charging cradle can be frustrating because you always need it to charge the headphones instead of finding a more universal and common cable to connect directly to them. On the upside, they're also compatible with the Jaybird MySound app, which offers good customization thanks to an excellent equalizer.

See our recommendations for the best wireless earbuds and the best earbuds with a mic.

Jaybird X3 Wireless

The Jaybird X4 Wireless are an upgrade from the Jaybird X3 Wireless. They are a bit more comfortable and have slightly better sound quality, especially in the treble range, but these results might be due to the different ear tips. They are also more waterproof, being rated IPX7, while the X3 don’t officially have an IPX rating. On the other hand, the X3 have better noise isolation and slightly better latency performance, but both aren’t ideal to watch videos.

Jaybird Tarah Pro Wireless

The Jaybird Tarah Pro Wireless are better headphones than the Jaybird X4 Wireless in pretty much every single aspect. They have lower latency, have a slightly more accurate treble range, and have a way better battery life. Their designs are very similar, other than the fact that the Tarah Pro have magnetic and rotating earbuds and have a braided cable. However, the X4 support multi-device pairing, offer more fit options, and are less expensive.

Jaybird Tarah Wireless

The Jaybird X4 Wireless and Jaybird Tarah Wireless are very similar headphones, but the X4 have a slight edge. The X4 have a slightly longer continuous battery life, a more adjustable fit, and come with a soft pouch. On the other hand, the Tarah have a better wireless range. The X4 also have an in-line remote that doesn’t feel as cheap as the Tarah’s.

Bose SoundSport Wireless

If sound quality is the most important thing for you, the Bose SoundSport Wireless are better headphones than the Jaybird X4 Wireless. Their sound quality is better and they are more comfortable. On the other hand, they barely isolate any noise, so the Jaybird are the better pick in that category. The Jaybird also have over an hour more in battery life and the Jaybird MySound app offers more customization than the Bose Connect app. The build quality is better on the Jaybird thanks to the waterproof IPX7 rating.

Jaybird Freedom 2 Wireless 2017

The Jaybird X4 Wireless are better in-ears than the Jaybird Freedom 2 Wireless 2017. They have better sound quality, a longer battery life, better leakage performance, better build quality, and are rated IPX7. On the other side, the Jaybird Freedom 2 are more comfortable, which can be the most important factor for some people.

Beats BeatsX Wireless

The Jaybird X4 Wireless are more comfortable than the Beats BeatsX Wireless and have a longer battery life. The Jaybird have an IPX7 rating for resistance to sweat and water, while the Beats don’t have any rating. Both score equally in the sound category, but the bass to mid-range is more even on the Beats, while the treble range is better on the Jaybird. For convenience, the Jaybird are more universal as they can be used with both Android and iOS. Their app also offers more customization than the iOS-exclusive battery life pop-up that the Beats offer. On the other hand, the Beats have better noise isolation performance.

Bose QuietComfort 35 II/QC35 II Wireless 2018

The Bose QuietComfort 35 II/QC35 II Wireless 2018 are better headphones than the Jaybird X4 Wireless for everyday use. Their over-ear design is more comfortable than the in-ear fit of the Jaybird, and their outstanding ANC feature gives you peace and quiet during your daily commute or in the office. They have a better-balanced sound profile out-of-the-box but don't have any EQ options in the app like the Jaybird. Also, the Jaybird are significantly more portable and will be a better option than the Bose if you’re looking for sports headphones as they feel much more stable.

Sony WH-1000XM3 Wireless

The Sony WH-1000XM3 Wireless will be more versatile headphones than the Jaybird X4 Wireless. These over-ears are very comfortable, and their great ANC feature is great for commuting. They are well-built and also have a great app that lets you EQ their sound profile, just like the X4. However, the Sonys won’t be as portable or breathable as the Jaybird X4. If you’re looking for everyday headphones, the WH-1000XM3 are the better option, but for sports, go with the Jaybird X4.

JBL Reflect Mini 2 Wireless

The JBL Reflect Mini 2 Wireless and Jaybird X4 Wireless are both designed as sports-oriented headphones, but the Jaybird might get the edge if you don’t mind the restrictive charging cradle. They have overall better build quality and have a companion app that lets you EQ the sound to your liking. On the other hand, the JBL have longer battery life and only need a micro-USB cable to charge them. Both have great wireless range, but the Jaybird can also connect to two devices, which is convenient.

Beats Powerbeats3 Wireless

The Jaybird X4 Wireless and Beats Powerbeats3 Wireless perform similarly, but the Jaybird have the edge thanks to their app that lets you EQ the sound to your liking. Also, the Jaybird have better isolation performance and you’ll be able to use these on the bus or at the office without a problem. However, the Beats have longer battery life that will last you a full workday, and some may prefer the ear-hook design for more stability during physical activities.

V-MODA BassFit Wireless

The Jaybird X4 Wireless are better headphones than the V-MODA BassFit Wireless, due to the fact that they have an app with a great EQ. They also feel more comfortable and seem to be better built. They are rated IPX7 for sweat and water resistance and don’t enter your ear canal deeply. On the other hand, the V-MODA have slightly longer battery life and don’t have a restrictive charging cradle like the Jaybird have, which is more convenient.

JBL Everest 110 Wireless

The Jaybird X4 Wireless are better headphones than the JBL Everest 110 Wireless. They feel more high-end and better-built, and their default audio reproduction is slightly more accurate. Also, they have an EQ that lets you customize their sound to your liking, which is nice. Their earbud-like tips are also more comfortable for most, and they also come with foam tips. However, the Jaybird have a restrictive charging cradle and less battery life than the JBL.

Jabra Elite Active 45e Wireless

The Jaybird X4 Wireless are better headphones than the Jabra Elite Active 45e in almost every aspect. Their sound quality is better, their earbud-like tips are more comfortable, their app offers more customization, they have a slightly better battery life, and they isolate more ambient noise due to their air-tight seal and closed-back design. On the other hand, the Jabra have a mic-mute function that the Jaybird lack, and you don’t need a proprietary cradle to charge them. The Jabra will be a better option if you want headphones to run outside with while being aware of your surroundings.

+ Show more

Test Results

Type In-ear
Enclosure Closed-Back
Wireless Yes
Transducer Dynamic

The Jaybird X4 look nearly identical to the Jaybird X3 Wireless. Even the in-line remote looks the same, but the tips on the earbuds and the stability fins don’t have the honeycomb design. They have a sporty look but come in even fewer colors than the X3, which were already less colorful than the previous Jaybird X2 Wireless.

Weight 0.04 lbs
Clamping Force
0 lbs

The Jaybird X4 are more comfortable than the Jaybird X3 Wireless and Anker SoundCore Liberty Air Truly Wireless. The earbud-like tips don't enter your ear canal as deep (similar to the Jaybird Freedom 2 Wireless 2017 and the Skullcandy Jib Wireless), and they're a bit more comfortable than most in-ears. Like most in-ears, they’re not comfortable for everyone and can get fatiguing after long listening sessions. On the upside, they come with two foam tips that people usually find more comfortable.

OS Compatibility
Not OS specific
Ease Of Use Good
Feedback Decent
Call/Music Control Yes
Volume Control Yes
Microphone Control No
Channel Mixing
Noise Cancelling Control No
Additional Controls No

The Jaybird X4's in-line remote is pretty much the same as the Jaybird X3 Wireless. Buttons are easily findable, and feedback is good. You get a volume control with track skipping and a basic play/pause button that also answers/ends calls. They're rated IPX7. The remote is also slightly better than the Jaybird Tarah Wireless, which doesn't feel as clicky but have the same easy-to-use three-button setup.

Avg.Temp.Difference 0.7 °C

Like most in-ears, the Jaybird X4 are very breathable. Your ears aren’t covered, so heat isn’t trapped under an ear cup. They should not make you sweat more than usual, which makes them a great choice for sports.

L 3"
W 3"
H 0.8"
Volume 7 in³
Transmitter Required No

The Jaybird X4 are wireless in-ears, so they're very portable. They'll fit easily in most pockets and bags to keep with you at any time. They also come with a small pouch, which doesn’t add too much bulk.

Type Pouch
L 3.3"
W 3.2"
H 0.8"
Volume 8 in³

The Jaybird X4 come with a small pouch similar to the Jaybird X3 Wireless. It'll protect the headphones from scratches and minor water exposure. Unfortunately, it isn’t a small solid case like the Jaybird X2 Wireless have, but they stay more portable that way.

Build Quality

The build quality is the same as the Jaybird X3 Wireless. The cable is flat, and the headphones feel solid enough to survive a few drops without damage. They're also certified IPX7 for protection against immersion in water. Unfortunately, the cord management clips were replaced by a cinch that some people don’t seem to like as much.


The Jaybird X4 are stable headphones for most sports. You’ll be able to run and train with them without any problem. They come with four tip options, of which two are comply foam tips and three stability fins for you to find the most comfortable and stable fit. Being wireless reduces the risk of them getting hooked on something and pulling the earbuds out of your ears. Although the stability fins look a little different, they're essentially the same.

Headshots 1
Headshots 2
In The Box

  • Jaybird X4 headphones
  • 2x silicone ear tips
  • 2x comply foam tips
  • 3x stability fins
  • USB charging cable
  • Charging cradle
  • Shirt clip
  • Carrying pouch
  • Manuals

Sound Profile
Bass Amount
1.5 dB
Treble Amount
-1.12 dB
Frequency Response Consistency
Avg. Std. Deviation
0.17 dB

The frequency response consistency is outstanding. If the user can achieve a proper fit and an air-tight seal using the assortment of tips that come with them, they should get consistent bass and treble delivery every time they use the headphones.

Raw Frequency Response
Bass Accuracy
Std. Err.
2.05 dB
Low-Frequency Extension
10 Hz
0.77 dB
1.41 dB
3.25 dB

The Jaybird X4 have excellent bass. Their LFE (low-frequency extension) is at 10Hz, which is excellent. Low-bass and mid-bass are flat and within 1dB of our neutral target. This results in a deep and punchy bass with just the right amount of thump and rumble. However, high-bass, responsible for warmth, is overemphasized by more than 3dB, bringing muddiness to the bass.

Mid Accuracy
Std. Err.
1.85 dB
0.36 dB
-2.75 dB
-0.02 dB

The Jaybird X4 have an excellent mid-range performance. The overall mid-range response is even and well-balanced, which is important for the clear and well-balanced reproduction of vocals and instruments. However, it shows about 3dB of recess centered around 700Hz. This nudges vocals and leads slightly to the back of the mix by giving more emphasis to bass and treble frequencies.

Treble Accuracy
Std. Err.
3.95 dB
-1.35 dB
-1.58 dB
-2.9 dB

The treble response is decent. Low-treble shows a 4dB dip around 4KHz, which will hurt the detail and presence of instruments. The sibilance region (6KHz-10KHz) is uneven, making some S and T sounds a bit sharp and some others a bit lacking. This will be mostly noticeable on vocals and cymbals.

1.63 dB
1.56 dB
Weighted Group Delay
Weighted Amplitude Mismatch
Weighted Frequency Mismatch
Weighted Phase Mismatch

The stereo imaging is outstanding. Their weighted group delay is at 0.12, which is great. The group delay graph also shows that the entire response is well below our audibility threshold. This ensures a tight bass and a transparent treble reproduction. Also, the L/R drivers of our unit were very well-matched in frequency, amplitude, and phase response. This is important for the accurate placement and localization of objects (voices, instruments, video games effects) in the stereo image.

Passive Soundstage
PRTF Accuracy (Std. Dev.)
PRTF Size (Avg.)
PRTF Distance
Acoustic Space Excitation

The soundstage is bad. This is because creating an out-of-head and speaker-like soundstage is largely dependent on activating the resonances of the pinna. The design of in-ears and earbuds is in such a way that fully bypasses the pinna and doesn't interact with it. Also, because these headphones have a closed-back enclosure, their soundstage won't be perceived to be as open as that of open-back earbuds like the Apple AirPods (1st generation) Truly Wireless.

Virtual Soundstage
Head Modeling
Speaker Modeling
Room Ambience
Head Tracking
Virtual Surround
Weighted Harmonic Distortion
WHD @ 90
WHD @ 100
Test Settings
SBC, 16-bit, 48kHz
Silicone (small)
Noise Isolation
Isolation Audio
Overall Attenuation
-20.67 dB
Noise Cancelling No
-6.01 dB
-19.41 dB
-37.82 dB

The isolation performance is decent. In the bass range, where the rumble of airplane and bus engines sits, they achieved almost 6dB of isolation which is mediocre. In the mid-range, important for blocking out speech, they reduce outside noise by more than 19dB, which is very good. In the treble range, occupied by sharp S and T sounds and computer fan noise, they isolate about 38dB, which is great. Compared to the original Jaybird X3 Wireless, the Jaybird X4 performs worse in the bass and treble ranges, probably due to their more earbud-like design. If you want sports headphones to run with while being aware of your surroundings, take a look at the Jabra Elite Active 45e Wireless.

Leakage Audio
Overall Leakage @ 1ft
22.54 dB

The leakage performance is fantastic. These in-ears practically don't leak, so you don't need to worry about disturbing people around you unless you are blasting your music in a very quiet room. With the music at 100dB SPL, the leakage at one foot away averages at 23dB SPL and peaks at 35dB SPL, which is noticeably quieter than the noise floor of an average office.

Microphone Style
Detachable Boom
Mic Yes
Recording Quality
Recorded Speech
FR Std. Dev.
2 dB
3,044.37 Hz
Weighted THD
44.45 dB

The microphone's recording quality is decent. Speech recorded or transmitted with the microphone will sound thin and muffled. This is due to LFE (low-frequency extension) being at 370Hz and the HFE (high-frequency extension) being at 3KHz. However, the limited high-frequency extension is a limitation of the Bluetooth protocol and is a problem with all Bluetooth microphones. Speech will still be decently intelligible on this microphone, though.

Noise Handling
Speech + Pink Noise
Speech + Subway Noise
13.43 dB

The in-line microphone is mediocre at noise handling. In our SpNR test, it achieved a speech-to-noise ratio of 13dB, indicating that they're best suited for quiet environments. But they won't be ideal for moderate and loud environments, as they will have difficulty fully separating speech from ambient noise.

Active Features
Active Features
Battery Type
Continuous Battery Life
7.3 hrs
Additional Charges
Total Battery Life
7.3 hrs
Charge Time
1.7 hrs
Power-Saving Feature
Audio While Charging
Passive Playback
Charging Port micro-USB

The Jaybird X4 have about seven hours of battery life with a 1.7-hour charging time. They don't have any auto turn-off setting so be sure to turn them off if you plan on using them later in the day. The battery life can be a bit short if you plan to use them during your whole work shift, but most casual listeners will find it more than enough. Also, the proprietary charging dongle is restrictive, and you will need to keep it on you to charge your headphones at any moment. You can also check out the Jaybird Tarah Pro Wireless for their much longer-lasting 13-hour battery life, so you don't have to carry the cradle around on your person as often. If you don't want a cradle, look at the JBL Everest 110 Wireless and their nine-hour battery life.

Active Features
App Support
App Name Jaybird MySound
iOS Yes
Android Yes
macOS No
Windows No
Parametric + Presets
ANC Control
Mic Control No
Room Effects
Playback Control
Button Mapping No
Surround Support

Update 05/03/2019: We've updated the review since we had previously listed the Jaybird app as not having an in-app player, but it has an integrated one for Spotify Premium users.

Just like the Jaybird X3 Wireless, the Jaybird X4 are compatible with the Jaybird MySound mobile app. It offers an excellent parametric EQ and lets you access community presets from other Jaybird X4 owners. The app doesn’t offer room effects but has an integrated Spotify in-app player for Premium accounts. The app is a good tool to find the best sound profile for your mood and music genre. On the other hand, if you don't need the additional customization options, then consider the JBL Reflect Mini 2 Wireless. They have a similar design and performance overall but lack a good app.

Bluetooth Version
Multi-Device Pairing
2 Devices
NFC Pairing
Line Of Sight Range
186 ft
PC Latency (SBC)
211 ms
PC Latency (aptX)
PC Latency (aptX HD)
PC Latency (aptX-LL)
iOS Latency
407 ms
Android Latency
117 ms

The Jaybird X4 can pair with two devices, which is great if you want to frequently switch between your phone and computer. Their pairing procedure is also fairly easy as you just have to hold the play button on the in-line remote for a few seconds.

They have more latency than the Jaybird X3 Wireless, and it will be noticeable while watching videos or when gaming. 211ms is more than most typical Bluetooth headphones. Both models have more latency than the Jaybird X2 Wireless.

Non-Bluetooth Wireless
Non-BT Line Of Sight Range
Non-BT Latency
Analog Audio
USB Audio
Detachable No
Length N/A
Connection No Wired Option
Analog/USB Audio Latency

These headphones don’t have any wired option.

PC / PS4 Compatibility
PC/PS4 Analog
PC/PS4 Wired USB
PC/PS4 Non-BT Wireless
Xbox One Compatibility
Xbox One Analog
Xbox One Wired USB
Xbox One Non-BT Wireless
No Base/Dock
USB Input
Line In
Line Out
Optical Input
RCA Input
Dock Charging
Power Supply
No Base/Dock

The Jaybird X4 don't have a dock. If you want a headphone that's versatile and has a dock, try the SteelSeries Arctis 7 Wireless 2017. However, it won't be as compact and easy to carry around as the X4.