FREE Shipping
FREE Tech Support
Award-Winning Support
60-Day Returns
Learn More »

JayBird JF4MBL Freedom Sprint - Midnight Black

Lightweight, SecureFit Athletic Sports Style In-Ear Wireless Bluetooth Headphones


We apologize

This item has been discontinued

Other conditions: Like New and Open Box (1) from $39.00

Get FAST answers from customers ASK a Question See questions answers

The Perfect Gym Headphones

New and Improved Freedom Sprint

Almost everything in the Freedom Sprint earbuds has been enhanced. Taking the highly effective secure fit and high performance audio system from the original Freedom, JayBird has improved on practically every other factor, including the cord, made softer to lay exactly where you want it. The new Freedom Sprint headphones are over 40% smaller than the original Freedom and are compatible with any A2DP Bluetooth stereo device. If you’ve enjoyed Freedom, you are going to love Freedom Sprint.

JayBird Freedom Sprint Size Comparison

Don't Let Your Music Become Distracting

The last thing you want to worry about while you're working out is ear fatigue. To combat this problem, JayBird specially designed the the Freedom Sprint headphones to eliminate listener fatigue. To accomplish this, the Freedom Sprint headphones are tuned to emphasize the sub-bass while reducing the ranges of the mids and extreme treble that can cause listener fatigue. The result of this special tuning is warm, thumpy sound that lets you turn up the volume without your ears getting tired. In addition to eliminating ear fatigue, the Freedom Sprint has fumble-free on-ear controls. Because the controls are on the actual ear tip housing rather than the cable you don't have to worry about accidentally ripping the earbud out of your ears while fumbling with the controls in between sets.

Freedom Sprint Eliminates Ear Fatigue

Your New Gym Partner

Sweat resistance may not seem like the most important thing you want from a pair of headphones, but if you're going to be wearing them at the gym and pouring sweat into them you're going to be thankful for it. The sweat resistance rating of the Freedom Sprint headphones means you can play and train hard without worrying about sweat damaging or even destroying your headphones. To seal the Freedom Sprint headphones, JayBird designed a specialized gasket seal under full-time compression to give the controls and housing a water-tight seal.

Freedom Sprint Sweat Resistance

Comfortable Patented Sports Ear Cushions

Freedom Sprint Comfortable Fit

The Freedom Sprint headphones were built with JayBird's patented sports ear cushions to hug the top, back and lower surface areas of your ears to give you the most secure fit on the market. In addition to the secure fit, these headphones are also incredibly comfortable. It doesn't matter if the headphone drivers are tuned to reduce ear fatigue if they aren't comfortable enough for all day use. JayBird included 3 different sizes of eartips and ear cushion fins to give you 9 custom fit options; these headphones are perfect for any ear.

General Features:

  • Freedom Sprint Wireless Bluetooth Headphones
  • In-ear design
  • On-ear music/call controls help avoid removing earbuds from ear
  • X-Fit Over/under-ear fit options
  • Signal Plus for skip free music outdoors
  • Jenna Voice prompts for easy use
  • Sweat-proof design
  • 4.5 Hour battery life from rechargeable Lithium Ion battery
  • Bluetooth Version: Bluetooth Class 2.1+EDR
  • Designed with a snug fit for active people
  • Includes different size tips for added comfort
  • Main Color: Midnight Black
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Frequency Response: 20-20,000 Hz
  • Sensitivity: 103 dB
  • Nominal Impedance: 32 Ohms
  • Cord Length: 1.2m
  • Bluetooth Version: Bluetooth Class 2.1+EDR
  • No. of Paired Devices: 2
  • Standby Time: 100 Hrs
  • Charging: USB (included)
  • Frequency Band: 2.4 GHz

What's in the Box?

JayBird JF4MBL Freedom Sprint What's in the Box?
  1. JF4 Freedom Sprint Bluetooth Buds (Midnight Black)
  2. 3 pair ear tips (S,M,L)
  3. 3 pair secure fit ear cushions (S,M,L)
  4. Optional ear hooks
  5. Standard Micro USB Cable
  6. Premium Protective Carry Case

Headphone Design

Headphone Type

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Headband Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Specifically For
Some headphones can use an IR Transmitter in your vehicle, while some can be plugged into your media device and be used on the go or at home.
Headphone Application

This is the application that the headphones are designed for. Each application has unique features that make it perfect for particular uses.

DJ: These headphones are durable, loud, and will often allow for one ear listening.

Gaming Delivers explosive sound and allows you to communicate with others.

Home Hi-Fi: These audiophile headphones are engineered to produce high fidelity and accurate audio.

Home/Office: These headphones are designed to produce rich, brilliant sounds that the artists would appreciate.

Sports: Designed for active use. These headphones are made to stay in (or on) the ear during workouts.

Kids: Feature noise limiting technology so that your little ones don't damage their ears listening to music too loud.

On-the-Go: On-the-go headphones are lightweight and often fold up for easy storage and portability.

Student: Compact and rugged enough to survive life in a backpack; inexpensive enough to not hurt the wallet of a student.

Studio: Reproduce music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Traveler/Airplane: These headphones are compact, lightweight, and have a portable design.

Acoustic Principle

The basic design of the headphones. There are 3 different types:

Open: Have ports that allow air through the back of the diaphragms, enabling the headphones to sound like the music is coming from an outside source.

Closed: Completely sealed and have no air passing through the diaphragms. Sounds like you are in a closed off room.

Semi-open: Have slots or ports in the back of the cup and are partially open. This allows for a mixed sound between an open and closed headphone.


General Features

Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
Device Controls & Compatibility
Refers to the devices the in-line controls are compatible with.
Universal Volume
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
Built-in to Earpiece
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Bluetooth means that the audio signal is transmitted from your device to the headphones via a Bluetooth connection.

Corded or Bluetooth means that the headphones can be used as corded headphones or as Bluetooth headphones. They have an input in one or both earcups for use as a corded headphone while they also have a built-in battery for use as Bluetooth wireless headphones.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

Bluetooth Wireless
Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
Bluetooth Version Compatibility
Which version of Bluetooth the device is compatible with. Is it important that the both devices being paired are the same version of Bluetooth. For example, a Bluetooth version 2.0 cell phone can be paired with a compatible version 2.0 headset.
Version 2.1
Connector Type
The type of connection the headphones use to connect to receive the audio signal from a music source. Traditional headphones use an analog 3.5mm headphone jack. Newer technology has allowed digital signals to be sent directly to the headphone using an Apple Lightning or USB-C cable.
Color Shades
Primary color shades of the headphones.
Refers to materials used to build the headphones. Most headphones are built from some combination of plastic and metal to give you a durable pair of headphones.
Ear Cushion/Earbud Material
Refers to the material that the ear cushions/earbuds are made from. Ear cushions and earbuds are available in a variety of materials, ranging from basic rubber eartips to plush leather ear cushions intended for maximum comfort.
Protective Case
Refers to whether a pair of headphones come with a protective case.
Hardshell Case
Water Resistant
This refers to the level of water resistance of the fitness tracker. Some fitness trackers are water resistant and can be used while swimming, while others are only splash proof or should not be used near the water.
Ear Hooks
These headphones feature hooks that wrap around your ears for a secure fit.

Audio Features

Driver Type

The physical design of the driver in the headphones.

Balanced Armature:
A balanced armature driver uses a coil wrapped around an armature which is held in between two magnets until it is stimulated by an electrical current. When stimulated, this armature is magnetized which causes it to rotate one way or the other around a pivot point which moves the diaphragm to create sound. Balanced armature driver headphones are generally earbuds and can have multiple drivers in each earbud.

Dynamic drivers are the most common driver type. They feature a permanent magnet, usually neodymium, a voice coil and a conical diaphragm to drive your music. A dynamic headphone driver looks pretty much identical to any typical home theater speaker.

Electrostatic drivers are made up of an extremely thin membrane, usually a coated PET film, stretched between two metal plates. An electrical signal is applied to the metal plates to create an electrical field which, depending on its polarity, draws the speaker diaphragm toward one of the plates which forces air through the perforations in the diaphragm which generates the sound wave.

Planar Magnetic:
A planar magnetic driver is made up of a large membrane suspended between two sets of oppositely aligned magnets. An electric charge is applied to the membrane to induce movement and produce sound waves.

The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
32 ohms
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
103 dB
Driver Size
This refers to the diameter of the driver (speaker) on each side of the headphone.
8 mm
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 20000 Hz
Audiophile headphones represent some of the finest headphones available. Audiophile headphones produce genuinely outstanding sound quality as well as extraordinary build quality, components and comfort. They are truly the finest headphones available.
Built-in Amplifier
This refers to whether the headphones have an amplifier built-in.

What is in the Box?

Main Product
The main product in the box.
JayBird JF4MBL Freedom Sprint Earbuds
Accessories included with the headphones
Carrying Case
Replacement Ear Tips
Paperwork included with the product.
User manual
Warranty/Registration card

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Awesome headset

April 24, 2014

I love this cordless headset, I would highly recommend them. The only fault they have is how long they stay charged. I use then everyday for 30-45 min so they have to be charged once a week.

50 of 59 found this helpful

Was this review helpful to you?

agoura hills, ca

well tested. fantastic

April 25, 2013

Ive had them for over a year. or two. got them when they first came out. Always happy with them. Last weekend did my usual MTB ride with them but left them in my jersey back pocket. Into the wash, into the dryer. Was excited cause I thought I could upgrade to the newest version. EXCEPT, Charged them up and listening to them RIGHT NOW. Cant ask for more.

45 of 52 found this helpful

Was this review helpful to you?

Raleigh, NC

Excellent Product!

March 13, 2014

I exercise a lot (treadmill/jog/ride).

- Good sound
- Great fit
- Great look
- Great packaging
- Great reception

I wish I had known about these a year ago. I seriously doubt I'll ever use another type again.

42 of 49 found this helpful

Was this review helpful to you?

United Kingdom

JayBird Freedom Sprint

May 19, 2014

Feels very durable and I love the flat wire makes it much easier to untangle.Bluetooth works flawless. Volume levels are ample. Only downer I wish it had a bit more bass.

44 of 54 found this helpful

Was this review helpful to you?


Big Bang! For your buck!!

April 28, 2014

I was very pleased with my jay birds there light weight, durable and the best part there's NO LONG CORDS! The price was right for my budget.

40 of 48 found this helpful

Was this review helpful to you?


Pleased so far!

March 7, 2014

I've had these for about a month and have no negative comments thus far. I was using the headphones that came with the apple iPod and iPhone before and these to me are a major upgrade. Yes, you have to remember to charge them after each use, but I can deal with that especially without having to deal with cords in my way!

36 of 42 found this helpful

Was this review helpful to you?


description a++

May 25, 2014

Beautiful product does not lack anything. There is no defects

32 of 38 found this helpful

Was this review helpful to you?

salt lake, utah

Great product,great seller

January 16, 2014

Great product, great sound, fast shipping, product was as described.

34 of 43 found this helpful

Was this review helpful to you?

Pt arthur Texas

Not Impressed!

January 31, 2014

I recently purchased the Jay bird Sonic.
The sound quality is OK and the accessories are many
But so far every time I get ready to use it the battery is dead so I end up using my old headphones.

32 of 40 found this helpful

Was this review helpful to you?

Charleston, SC

Second time is the charm (hopefully!)

July 17, 2014

These are convenient headphones that fit well and do not fall out. I had to return the original headphones, however, because the power button was a little loose, which actually created a pretty annoying rattle when the earpiece was in my ear. This second set seems pretty good, though.

29 of 36 found this helpful

Was this review helpful to you?


Great product

August 6, 2014

Excellent product, all on time and it works perfectly everything was sealed

27 of 34 found this helpful

Was this review helpful to you?


revisão JayBird Freedom Sprint

September 30, 2014

A qualidade do som é bem legal , o problema desse fone é que para o som não cortar você precisa manter o dispositivo que esta tocando muito próximo e isso me incomoda bastante.
No caso do ciclismo que pratico não consigo colocar meu cel na bolsa do selim, porque fica impossível ouvir uma musica devido aos cortes.
Acredito que um fone que não tenha fio ter que manter a origem do som tão perto assim faz mais sentido ter um fone com fio.

26 of 33 found this helpful

Was this review helpful to you?

Browse 1 question and 5 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
It was 36% cheaper than purchasing it at a retail electronics store.
David Z on Aug 8, 2015
This will be my second pair. I had my first set for 3 years of constant use. So sad when they couldn't hold a charge anymore. Looking forward to my new pair.
Marchelle L on May 25, 2015
I have read multiple reviews on this product, all good things. Hopefully this will be a purchase of my money well spent!
Hannah J on Jul 23, 2015
I've used this headset before. It's terrific. A must have for me.
Toby M on Nov 12, 2014

Product Summary


Model Number

Freedom Sprint (Midnight Black)



Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JayBird JF4MBL Freedom Sprint - Midnight Black

Item Added to Cart

JayBird JF4MBL Freedom Sprint - Midnight Black

Lightweight, SecureFit Athletic Sports Style In-Ear Wireless Bluetooth Headphones


Keep Shopping

Get Added Peace of Mind with SquareTrade

Why SquareTrade?

  • The #1-Rated Protection Plan
  • 5-Day Service Guarantee & Free Shipping
  • Protection from Normal, Everyday Use
You have added a warranty
Add Warranty
3 years of protection