• Award Winner
Item# S400BTBLK

Synchros S400BT


JBL stereo heapdhones with Bluetooth 3.0 wireless freedom

$229.95 each
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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

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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

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  • Technical help
  • Parts and accessories
Synchros S400BT is rated 4.625 out of 5 by 32.
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
Rated 5 out of 5 by from Great set of headphones Extremely crisp sound. Can play hard basslines and still play other sound without distortion. Wireless feature is amazing, really is convenient if you don't want to have your phone out while you listen.
Date published: 2015-12-19
Rated 5 out of 5 by from Best to date The S400BT is by far the best pair of Bluetooth headphones I've owned to date. Intuitive, easy to use, pair, looks awesome, & sounds way way better than Beats headphones (but that is just my personal opinion). Unlike most "on-the-ear" headphones these sit super lightly on your ears & do not squeeze your head over the length of time that you wear them which is great! The touch sensor is a BALLER feature!!! I love the simplicity behind the design of these headphones. I also know from experience that if you compare the performance these are better than the S500. If there was one thing I can change is that they were over-the-ear headphones. Lastly, if you want to talk about price range for what the end product is worth, I would have happily paid another $60 if JBL asked for it. And if you are contemplating on buying these or not.....please stop wasting your time and buy these already. Don't wait, just buy & buy now. And JBL customer service is second to none. I'm a super happy satisfied customer.
Date published: 2015-12-02
Rated 5 out of 5 by from Absolutely Amazing Bought this last week, couldn't be more happy with them. The swipe feature and LED patterns get so much attention its ridiculous. They noise cancelling on these headphones is phenomenal. They sound better than my friends $400 Bose nosie canceling over-ears.
Date published: 2015-10-07
Rated 5 out of 5 by from Great Sound! Awsome product Excellent sound for musics and phone calls. Its just perfect!
Date published: 2015-01-30
Rated 5 out of 5 by from good sound and comfort purchased for my kids for Christmas gifts they love them
Date published: 2015-01-03
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Do s400 headphones have a Mic on them to chat?

Asked by: jerm
Yes, the S400BT features a microphone.
Answered by: Karissa
Date published: 2016-02-10

Why am I not able to connect via bluetooth to my computer, I  can connect to my Iphone but not my desktop nor laptop, can you help

Asked by: Augie
Please make sure that your computer has bluetooth options and make sure it is in search mode when you are attempting to connect. If you are still having issues, please contact our Customer Service for tech support.
Answered by: Karissa
Date published: 2016-02-07

Why is the Bluetooth scanning not finding the headphones on my phone or tablet 

Asked by: Jason137
Thank you for contacting us. We are sorry to hear about the issues you are having with our product. Your headphones come with a one year warranty. Please contact JBL customer support for information regarding your warranty options, thank you!
Answered by: Karissa
Date published: 2016-02-05

Why can I not connect Bluetooth to phone or tablet it's not showing up when I scan I've try ed everything please help they sound great plugged in I'd hate to have to return them

Asked by: Jason137
We are sorry to hear about the issues you are having with our product. Please make sure that you are wearing the headphones so you can hear the audible voice stating when it is pairing mode. If this problem persists, please reach out to our JBL Customer Support regarding your issue.
Answered by: Karissa
Date published: 2016-02-02

My son , Jason Martin bought the headphones JBL Synchros S400BT Full Size Blueto..IS it possible that the  1 3.5 mm audio cable 1 USB charging cable were not in the box? Please let me know if they should be included?

Asked by: Denise
All the necessary parts such as the audio and USB charging cable are included in the box. Please look under the headphone tray inside the box that should have these spare parts and the owners manual as well, thank you.
Answered by: Karissa
Date published: 2016-01-27

I got this pair of headphones for Christmas. I'm not sure if it just my pair or not but when I'm working out they cut out every once in awhile. They sound like they crackle and do not hold a steady connection

Asked by: Tanner
There are a couple of things to be considered here. 1. If you are using the wired connection, make sure the cable is securely connected on both ends. A loose cable can cause a crackle like sound. 2. If you are using them via Bluetooth, try moving your device to the other side of your body. Bluetooth radio signals do not go through your body very well.
Answered by: ChrisS
Date published: 2016-01-27

Can these be used for d.j.ing ,?

Asked by: Choice
Yes, the S400s will work via the wired connection. These are an on-ear design so if you are doing a louder set, the S500s might be another pair to look at. They are over the ear and may block out some of the ambient noise.
Answered by: ChrisS
Date published: 2016-01-26

How do I tell when the headphones are fully charged? (When charging via the USB the connector LED glows red. Does it go off when fully charged?) Also, can the USB connector be used with a laptop to participate with apps like "Live Meeting"? Mic enabled?

Asked by: Jzak
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