• Award Winner
Item# S400BTBLK

Synchros S400BT


JBL stereo heapdhones with Bluetooth 3.0 wireless freedom

$229.95229.95 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 4.5897 out of 5 by 39.
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
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
  • 2016-05-24T11:01CST
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  • loc_en_US, sid_synchross400bt, PRD, sort_positive
  • clientName_JBL

Can i use them with the wire when not charged ?

Asked by: chameau
Yes, it is not necessary for the headphones to be charged if you use the auxiliary cord to listen to your device.
Answered by: Karissa
Date published: 2016-05-09

What is the difference between S400 BT and S400 BT+ ? Any difference in the sound specs? Surprised there's no mention on your corp site for the +. ....

Asked by: rchilde
The S400BT+ is not a product that we sell in the US. If you are located outside the US you would need to get in touch with the dealer who carries the S400BT+.
Answered by: Amir at Customer Service
Date published: 2016-05-05

How long does a charge last? 

Asked by: BigMacThaStoryTella
The USB recharge battery lasts up to 15 hours on the Synchros S400BT.
Answered by: Karissa
Date published: 2016-05-02

does the touch sensor only work with nfc enabled devices? I have an iphone 5 and can't seem to get the touch sensor on S400BT to work controls

Asked by: stevemc
In order for the touch sensor to work properly, you have to use an NFC-enabled device.
Answered by: Karissa
Date published: 2016-04-25

why is the sound is low right side of my jbl synchros s400bt ?

Asked by: Smashing
Its possible that you do not have the 3.5 jack plugged in all the way or properly. If the jack is not fully connected and inserted, it can cause the sound to drop or be muffled. If you are still experiencing issues with the sound, please contact your local JBL Customer Service for technical support.
Answered by: Karissa
Date published: 2016-05-01


Asked by: BIGMAN
Please contact the JBL Customer Support for information regarding part numbers and availability, thank you.
Answered by: Karissa
Date published: 2016-05-20

What is the proper way to charge these?

Asked by: Jb8301
The Synchros S400BT comes with a micro USB cable that you can plug into your laptop or computer. The 2.5 mm jack end will need to be plugged in on the right ear phone that is located between the power and the bluetooth button.
Answered by: Karissa
Date published: 2016-04-07

What is the actual range of bluetooth? I sat 10 feet away from TV and sound jittered. It works perfectly fine when I sit in 6 feet range of TV.

Asked by: Athar
The S400 typically has a 30-40 ft bluetooth range. Try using the headphones on another device to see if you still have the same distortion after 10ft. If the problem persists, please contact your local JBL Customer Service for technical support.
Answered by: Karissa
Date published: 2016-03-15
  • 2016-05-24T11:06CST
  • bvseo_cps, prod_bvqa, vn_cps_3.2.1
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  • clientName_JBL

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