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JayBird JF4MBL Freedom Sprint - Midnight Black

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

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JayBird JF4

Almost everything in Freedom Sprint has been enhanced. Taking the highly effective secure fit and high performance audio system from Freedom, we have improved on practically every other factor, including the cord, made softer to lay exactly where you want it. If you’ve enjoyed Freedom, you are going to love Freedom Sprint.

What's In The Box?
  • JF4 Freedom Sprint Bluetooth Buds
  • 3 pair ear tips (S,M,L)
  • 3 pair secure fit ear cushions (S,M,L)
  • Optional ear hooks
  • Standard Micro USB Cable
  • Premium Protective Carry Case

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
  • Also Available In: Storm White
  • 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

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: Disc Jockeys (DJs) require a special type of headphone that can meet their professional needs. These headphones are durable, loud, and will often allow for one ear listening.

Gaming This lifestyle speaks for itself! If you love video games and want a pair of headphones that will deliver explosive sound and allow you to communicate with others, this is where you need to shop!

Home Hi-Fi: For those that need the best in music quality. These audiophile headphones are engineered to produce high fidelity and accurate audio replication.

Home/Office: These headphones are made to sound great. They are designed to produce rich, brilliant sounds that will play your music in a manner that the artists would appreciate. These headphones are for those that love music.

Sports: Designed for active use. These headphones are made to stay in (or on) the ear during workouts. Whether you frequent the gym or go running outside in the fresh air, these active style headphones will be your best friend.

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

On-the-Go: Anyone who is always on the go wants a pair of headphones that can keep up with them. On-the-go headphones are lightweight and often fold up for easy storage and portability so that you can take them with you anywhere.

Student: Student headphones are quality, durable and compact headphones on a budget. They're compact and rugged enough to survive life in a backpack and inexpensive enough to not hurt the wallet of a student.

Studio: You're a music creator. Whether you're producing and mixing it down or in the studio recording yourself, you need a pair of headphones that will reproduce the music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Traveler/Airplane: Those that often find themselves on planes or on the road a lot. These headphones are compact, lightweight, and have a portable design. Some of the headphones in this lifestyle will feature noise cancellation technology that will help shut out outside noise.

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
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 Guide
Warranty 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


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.

20 of 30 found this helpful

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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.

16 of 26 found this helpful

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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.

23 of 42 found this helpful

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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!

10 of 17 found this helpful

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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.

9 of 18 found this helpful

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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.

11 of 22 found this helpful

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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.

10 of 22 found this helpful

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description a++

May 25, 2014

Beautiful product does not lack anything. There is no defects

11 of 24 found this helpful

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Great Britain

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.

15 of 32 found this helpful

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salt lake, utah

Great product,great seller

January 16, 2014

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

13 of 28 found this helpful

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Great product

August 6, 2014

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

8 of 19 found this helpful

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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.

9 of 22 found this helpful

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Accessory Tools and Products

Accessories added

Limitless Creations Earbuds Case

Universal Thermoformed EVA Ballistic Nylon Shell Case for Earphones w/ Soft Inner Lining

Your Price $4.99

Comply SX-200

Premium 200 Series Sport Plus Replacement Earphone Tips

Your Price $11.95

Comply T-200

Premium 200 Series Isolation Replacement Earphone Tips

Your Price $13.95

Comply TS-200

Premium 200 Series Comfort Replacement Earphone Tips

Your Price $15.95

Comply Variety Pack-200

Premium 200 Series Variety Pack Replacement Earphone Tips

Your Price $13.95

Browse 1 question and 2 answers
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Why did you choose this?
Sonic Electronix Store
I've used this headset before. It's terrific. A must have for me.
Toby M on Nov 12, 2014
Friend recommended.
Saddyna B on Sep 4, 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