• Award Winner
Item# S400BTBLK

Synchros S400BT


JBL stereo heapdhones with Bluetooth 3.0 wireless freedom

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You can’t press pause on a pro-audio revolution – certainly not when JBL engineers are at the helm. Introducing the new JBL S400BT. As the latest addition to the JBL Synchros line of premium headphones, the award-winning S400BT adds the freedom of Bluetooth 3.0 wireless to the performance of a Synchros headphone. Using advanced aptX digital encoding technology that streams high-resolution audio on par with any wired Synchro headphone, the S400BT is fine-tuned on the inside to maximize enjoyment on the outside. Take the headphone’s hassle-free single touch sensor for instance: all you need to do is swipe your finger anywhere along the S400BT’s left outer earcup, and you can seamlessly adjust your headphone’s volume, track-changes, and call settings, since the entire earcup functions as a single, touch-sensitive control system. The right outer earcup boosts user flexibility as well, coming with an NFC sensor that pairs your headphone to any NFC-enabled device. Just give the right earcup a single tap, and you’re instantly connected. With this level of intuitive technology at play, it’s hard not to notice how the S400BT simplifies like never before. Others will definitely take notice: a built-in LED lighting system trails the touch of your hand in reaction to each adjustment made to your headphone’s settings. Now you can showcase your listening experience at the speed of light. Viewed as a whole, the S400BT is a wireless headphone that’s meant to celebrate - as much as to simplify – premium listening. Chances are you’ve never witnessed a headphone that comes even close to this.

What's in the box?

  • Quick-start guide
  • 1 3.5 mm audio cable
  • 1 USB charging cable
  • 1 pair JBL S400BT wireless on-ear Bluetooth® stereo headphone
  • Carry Case

Sound modeled after industry leading JBL professional audio speakers delivers a balanced audio experience with amazing clarity and deep powerful bass, while advanced aptX encoding lets you experience the highest possible wireless sound quality available.

Wireless technology liberates you from the hassles of wires, while NFC technology on the right outer earcup simplifies the Bluetooth pairing process. The innovative touch sensor controls on the left earcup enable you to advance tracks, adjust volume, and play or pause your music, as well as take your calls – all with an easy swipe of your finger anywhere along the earcup’s surface.

A unique LED lighting feature responds intuitively to every adjustment made to your headphones’ touch sensor control system, following the direction that you swipe your finger across the earcup.

Rated Power Input
Frequency Response
10Hz – 22kHz
Maximum SPL
115dB @ 30mW
Premium 40mm drivers

The latest owner's manuals, quick start guides, and documents.

Call us: 1.800.336.4525

  • Sales and pre-sale assistance
  • Technical help
  • Parts and accessories
Synchros S400BT is rated 4.6 out of 5 by 40.
Rated 5 out of 5 by from great sound Bought these after my other jbl bt headphones left speaker went out but my old pair showed a battery level on my iphone 6 how come i dont get the battery level on this pair???
Date published: 2016-05-22
Rated 5 out of 5 by from Great quality I love this product. The build quality and the sound quality are amazing. The battery life is another great feature that I love about this product.
Date published: 2016-05-07
Rated 5 out of 5 by from great head phones I bought these head phones about three months ago and love these to death ..
Date published: 2016-03-22
Rated 5 out of 5 by from Jbl greatness. These.are realy nice....the.earpads are soft and comphy.the sound is awsume.im spoiled rotten.
Date published: 2016-03-13
Rated 5 out of 5 by from Excxellent These were not an IMPULSIVE buy. I shopped, and concluded that ALL THINGS considered, from price, features, technical specs, these were simply the BEST. Tested a comparable in both the Beats, and Bose Brands, and these won out hands down. Not even close. And beyond the sound quality, and style was the value. Both Beats, and Bose were FAR more expensive. Guess they have to pay for all that advertisement some how. Comparatively to the other brands the one stand out feature beyond just overall better sound was the Low's (Bass) sound where these far out perform the others. The other two sound as if they were EQ'd with the bass turned all the way down, an the treble up. I just ordered the exact same ones for my 15 year old grandson. I tried mine, and loved them.
Date published: 2016-01-10
Rated 5 out of 5 by from Great functionality! I bought this on Black Friday for a bargain. The touch screen is such a cool feature. I don't have to touch my phone at all to listen to my favorite music, but just need to press one button and the touch pad, both on the left ear. I sometimes plug into my computer at work which is a great option if I'm in my office for an extended amount of time. If I go for a walk, it's as simple as unplug, press two buttons and I'm listening to my favorite music in seconds. Also, very portable and comfortable with great sound quality.
Date published: 2016-01-05
Rated 5 out of 5 by from I wish I had tried JBL HEADPHONES YEARS AGO! They're great!
Date published: 2016-01-04
Rated 5 out of 5 by from THESES HEADPHONES SOUND JUST AMAZING!!! I LOVE Music & If You Are Any Kind Of Music Person You Will LOVE The Sound That Emminates From These Cans. Buy A Pair Now!!!
Date published: 2016-01-04
  • 2016-09-25T09:24CST
  • bvseo_cps, prod_bvrr, vn_cps_3.4.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_40
  • loc_en_US, sid_synchross400bt, PRD, sort_positive
  • clientName_JBL

I am having trouble pairing the headphones with other devices..any advice?

Asked by: Bobby13
A white LED light indicator means the headphone is ON. To have this connected on your phone 1.Press and hold the POWER ON button for 0.5 seconds. The LED light indicator should blink fast if it’s blinking slowly, You need to press and hold the POWER ON button again till it starts blinking fast. 2.Once LED light is blinking fast you are ready to pair to your mobile phone. 3.From any Home screen, tap Apps. 1. Tap Settings. 2. Scroll to 'NETWORK CONNECTIONS,' then tap Bluetooth. 3. Slide the Bluetooth Switch right to the ON position. 4. The Bluetooth Switch moves right and turns green. 5. If necessary, turn on the other device and make it discoverable. 6. Under 'AVAILABLE DEVICES,' tap the device to pair. 7. Tap Scan if you do not see the device.
Answered by: Jaycob at CustomerService
Date published: 2016-09-07

Is the charging cable for the s400BT the same specs as the charging cable for the e40BT?

Asked by: Brett
Yes. Any USB to 2.5mm Aux cable can be used to charge the headphones.
Answered by: Joe G at Customer Service
Date published: 2016-09-02

Where would the serial number be for these headphones?

Asked by: Tyrek
The serial number should be under the earpads of the headphone. Try and remove the earpads on the headphone and you should see a small white sticker indicating the serial number.
Answered by: Amir at Customer Service
Date published: 2016-08-20

I have trouble pairing my Synchros S400BT and Macbook Pro using Mac OS X 10.6.8. The computer does not even find the headphone. What is its device address? Can you help?

Asked by: EEEE
Bluetooth compatibility should be checked before connecting any Bluetooth capable device to one another, i.e recent/newer model mobile devices came out with Bluetooth version 4.1 which is compatible with these Bluetooth Profiles: A2DP V1.3, AVRCP V1.4, HFP V1.6, HSP V1.2. Some laptops(Mac/Windows based) comes with Bluetooth version 4.1 which also has the aforementioned Bluetooth Profiles. Some older versions of laptops only has the Bluetooth version 3.0 and below, which is not a problem with Bluetooth version 4.1 in terms of connectivity as Bluetooth version 4.1 is said to be backwards compatible, so connecting a device with a higher version of Bluetooth to another device with a lower version of Bluetooth is possible. The concern now is if the laptop's Bluetooth version is capable of Bluetooth audio streaming using the latest Bluetooth Streaming Profiles( A2DP V1.3, AVRCP V1.4, HFP V1.6, HSP V1.2 ). If the computer is not capable of streaming audio wirelessly via Bluetooth, you would need to update the Bluetooth version of your laptop. Firmware(drivers) and Software updates are available from the manufacturer of the laptop/computer.
Answered by: Amir at Customer Service
Date published: 2016-07-24

Where do I go to get the driver fo S400BT

Asked by: Jim Todd
The Dynamic Driver is the most common driver that is featured in all JBL headphones. Please contact your local JBL Customer Support for information regarding replacement parts and availability.
Answered by: Karissa
Date published: 2016-07-24

Does it have a built in microphone? I want to use it primarely at the gym, but I intend on answering phone calls and use in on skype on my computer.

Asked by: Atila
Yes, the SYNCHROS S400BT has a built-in microphone which you can use for phone calls and Skype.
Answered by: Joe G at Customer Service
Date published: 2016-07-14

how long does it take to charge the wireless synchros bluetooth s400bt headphones

Asked by: cannon
The S400BT takes 2-3 hours before it reaches full charge. There is an Light Emitting Diode in the ring around the charging plug. This LED lights up in red when charging takes place. When charging is complete, the LED changes to white color.
Answered by: Joe G at Customer Service
Date published: 2016-07-01

How do I charge the battery of this headphone?

Asked by: Manny P
You can charge the headphone using the USB charging cable that came with the headphones, plug the USB end to any USB adapter to a wall outlet or use the USB port of any computers/laptop then connect the audio jack to the headphones.
Answered by: Amir at Customer Service
Date published: 2016-06-21
  • 2016-09-25T09:41CST
  • bvseo_cps, prod_bvqa, vn_cps_3.4.0
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_30
  • loc_en_US, sid_synchross400bt, PRD, sort_recentAnswersFirst
  • clientName_JBL

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Closeout\n \n\n JBL\n \n Synchros S400BT Wireless On-Ear Bluetooth Stereo Headphones, 20 Hz-20 kHz Frequency Response, Black
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