Jaybird X4 Review

It doesn’t matter if you’re someone who enjoys running, weight-lifting, or just delights in a casual stroll down the elliptical, because surely, you’ve already heard about Jaybird and their earbuds. The product that kickstarted Jaybird’s wireless in-ear buds innovation was the Bluebuds X from the year 2012; and after six years, we now have the Jaybird X4.

For years, Jaybird has continuously been the leading company for Bluetooth fitness earbuds. And one of their most notable products is the Jaybird X4 which surely blew their competitors away.

Last year, the company released their true wireless Run which was good too; so today, we’re going to check out the X4 and see if it’s really just as good or better than the other devices from Jaybird. Let’s take a look at what’s included in the package for these earbuds.

Jaybird X4 Review – What’s in the Box?

The Jaybird X4 comes in a light grey rectangular box with a clean and simple design. The front portion of this will give you an image of the headset, while on the top left corner, you will find “X4” written in bold letters. Below these are some descriptions and key features of the product.

When you check out the sides of the box, you will see a couple of other details about the product, as well as the Jaybird App. When you flip the box, more key features and details are listed at the back portion.

At the top of the box, you will find a hang tab; this is to pull the black box that is inside the gray package. The package of the X4 features a flip cover, thus, will let you immediately see the headset placed on a plastic tray.

In the box, you will find other necessary accessories including two pairs of ear tips, two pairs of comply tips, three pairs of ear fins, a charging cradle, the speed cinch, shirt clip, and a carry pouch.

The Product

Jaybird X4 Review

When it comes to the X4, it all starts with the design. The company did not recreate the wheel with this device since they saw what worked for their X3 and simply made improvements. The X4’s design isn’t all revolutionary, yet goes a long way in establishing the company as a major player in the market of Bluetooth earphones.

The improvements and enhancements come from the gel-like ear tips that are really comfortable. They also included a Speed Cinch cord control system which is really very useful and convenient. Honestly, it makes us wonder why this specific element didn’t exist years ago.

As for the X4’s overall design, it was carried over from the previous device; thus, having a slim profile for the earbuds, a flat cord, as well as an ultra-light remote. Here, the most noticeable design change would be on the speaker tips. Instead of the regular aluminum finish, the company made use of the durable aluminum material yet included a nice flair of color.

The company also ditched the traditional Jaybird ear fins that come with a honeycombed inlay. Instead, the X4 took the flexible ear tips from the Freedom 2 which adds more comfort to your listening experience. These are made from a flexible gel material which is also utilized for the ear tips, leaving both parts easy to contort and perfectly take the shape of your ear.

The company also included their proprietary Comply Ultra foam tips, though personally, we prefer the silicone ones since they feel more comfortable especially during prolonged use. However, the foam tips are just as good, so it’s really just a matter of preference.

The fit of the X4 has also been greatly improved and this is all thanks to the inclusion of the redesigned wing and tip options. Another excellent improvement would be the cord management system which is more convenient for keeping things neat and organized.

The device also comes with wings plus foam and silicone tip options that come in different sizes.  As for the Tic Pods like in almost all wireless earbuds, come in a nice compact carrying / charging case which appears just like a pill bottle. It also has a short strap made of silicone to secure the case to your key strap or belt loop.

The case isn’t really as small as the usual cases for earbuds, but it sure fits perfectly in pockets, and we’re talking about pockets of women’s skinny jeans so the case is still considered small.


The X4 is an in-ear type of device that has passive noise isolation. It has 16 Ohm impedance and 99 + -3dB @ 1KHz for its speaker sensitivity. It has a maximum output of 1- mW rms while < 5% is for total harmonic distortion; the earbuds also have a 16-bit stereo audio format which is really good.

For its codec, the X4 has the Bluetooth SBC implementation + AAC, with 20Hz to 20kHz for its response bandwidth. It’s all in all driver size is just six millimeters.

Bluetooth + Microphone

The X4 makes use of the 4.1 Bluetooth with a frequency band of 2.4 GHz. It has available profiles which include Handsfree, A2DP, Headset, SPP, AVCRP, and has a Class-2 standard wireless range of 10 miles or 33 feet.

Of course, Jaybird didn’t forget the earphone’s built-in MEMS, omnidirectional microphone that has a sensitivity of – 38dB + -3dB. The X4 is also compatible with any Bluetooth device as long as these have HSP, HFP, and A2DP.

Product Dimensions and Weight

The X4 is 545 x 13 x 24.2 millimeters and weighs 14.7 grams without the tips and fins. The controller is 42.5 x 11.6 x 5.3 millimeters while the charger is 98 x 18.1 x 9.6 millimeters. As for the charger’s weight, it is just 5.5 grams in total.


The Jaybird X4 has a total playtime of 8 hours while its charging time takes a total of 2 hours. If you’re opting to do a quick charge, you’ll only need 10 minutes to get an hour worth of play time. Charging the device will be done via the USB charging cable that comes with a Pogo pin connector.

Its input power is DC 5-V 1A. This Lithium-Ion battery has a 3.8 Voltage while its energy Voltage in Watt-hours per battery is 0.2wh.

Product Features

Strong and Versatile

Whether you’re going for a bike up the mountains or a trail run, you can use the X4 earphones since it’s designed for athletes who need headsets for all-around use. The X4 is IPX7-rated which guarantees that this device is weatherproof and waterproof.

Unlike the previous models that were water and dust resistant, the X4 can go through heavy rains without breaking. You can even take these earbuds for swimming since they can withstand up to 30 minutes of water submersion.

Customize your Audio

With the adjustable EQ in the Jaybird app, you can personalize your sound experience and bring the best out of your music.

Endurance for the Whole Day

The great thing about the X4 is its battery – with only two hours of charging, it lasts for up to eight hours.



  • Type: In-ear style
  • Noise-isolation: Passive
  • Impedance: 16 Ohm
  • Speaker sensitivity: 99 +-3dB at 1KHz
  • Output max. 10mW RMS (with level limit)
  • Total harmonic distortion <5% (1KHz, 1mW)
  • Audio format: 16-bit stereo
  • Codec: Bluetooth SBC implementation and AAC
  • Response bandwidth: 20Hz – 20kHz
  • Driver size: 6 mm


  • Bluetooth version: 4.1
  • Frequency band: 2.4 GHz
  • Profiles: Handsfree , Headset , A2DP , AVCRP , SPP
  • Wireless range: Class 2 standard range 10m/33ft


  • Type: MEMS, omni directional
  • Sensitivity: -38dB +-3dB (Test conditions: 94dBV/Pa SPL, 1KHz, A-weighted)


  • Any Bluetooth device with HFP, HSP and A2DP


  • Headset: 545mm x 13mm x 24.2mm
  • Controller: 42.5mm x 11.6mm x 5.3mm
  • Charger: 98mm x 18.1mm x 9.6mm
  • Weight of headphones (without fins and tips): 14.7g
  • Weight of charger: 5.5g


  • Play time: 8 Hrs*
  • Charging time: 2 Hrs
  • Quick charge: 10 min = about 1 hour play time
  • Charging: Via USB charging cable with Pogo pin connector
  • Input power: DC 5V 1A
  • Type: Lithium Ion
  • Battery voltage: 3.8V
  • Energy voltage in watt hrs per battery: 0.2wh

Using the Product

Every X model from Jaybird has undeniably excelled in performance and sound quality. With that, the company continues the momentum with their X4 earphones. It promotes a finely-balanced soundstage that can handle mids and lows adequately.

The sound quality didn’t change all that much but we can definitely say that the sounds it produces are outstanding. Audio coming from the X4 was great from the day we tried out the device. It offered an adequate mix of clarity and bass for everything that we listened to.

If you’re planning to fine-tune your audio experience, you’ll find a couple of EQ settings that are fully customizable in the Jaybird My Sound app.

The company claims that the X4 can go for 8 hours of continuous playback and we did experience that; but surprisingly, there were certain instances when our listening experience went even close to ten hours which is pretty amazing since it exceeded our expectations. With that, it only means that you’ll be able to get a whole week of working out before having to refuel your earphones.

We also tried using the X4 for a couple of calls and the results were good. The person on the other line was able to hear just as clearly as we did; both ends were loud and we didn’t need to bother raising the volume which is very convenient especially when you’re out.

Connection strength was pretty average but we didn’t have any issues; we didn’t even experience any skips despite running or walking around. Also, it was a true waterproof device since it performed well even while running under the rain.

The sounds were just as perfect as it was when we used them during a normal sunny day, and it still offered loud and crisp sounds that were perfect.

As for the control module, it features three buttons that all worked perfectly fine. We didn’t have any issues reaching these while running, especially when we needed to skip between tracks or adjust the volume.

Overall, we give the Jaybird X4 two thumbs-up for its excellent performance, durability, and audio quality.


In the X4, Jaybird solved some of the biggest issues that people complained about in the company’s previous models. With that, we really appreciate Jaybird for listening to their customers’ feedback. In fact, there’s a lot of improvement in these earbuds.

One great thing is its waterproof feature since it can now be submerged into water for several minutes. As expected from Jaybird, the sound quality got better too. In fact, it’s superior and we were able to customize our audio via the Jaybird app, so everything was just perfect.

There are a lot of options in the market but if you want the best headset for workout and adventures with excellent quality and sounds, then the X4 from Jaybird is the best choice for you. In terms of sound and functionality, this definitely meets everyone’s needs.

Where to Buy

You can pickup a pair of Jaybird X4 wireless sports headphones for only $189AUD from over at the official Jaybird website.

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