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Synchros E40BT


Bluetooth® on-ear Headphones with music sharing feature

£79.9979.99 each £89.99
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Be Connected. Share Music. Wirelessly

Next Generation, on-ear stereo headphones featuring JBL’s legendary sound, Bluetooth® connectivity, ShareMe music sharing and mobile-friendly features, all in a stylish, contemporary design. The new E40BT takes JBL’s legendary signature sound, adds advanced Bluetooth and mobile features, and packages it all in a sleek design that’s both comfortable and head-turning. JBL’s engineers have combined generous 40mm drivers withPureBass performance, treating your earsto expansive frequency response (20hz to 20KHz) with full, undistorted bass. Bluetooth technology allows wireless connectivity with phones, tablets and music players, Built-in ShareMe™ technology lets you to stream music wirelessly to another ShareMe-equipped headphone. A built-in rechargeable Li-ion battery gives 16 hours play time, and when the battery is flat, use the included aux cable for continued, uninterrupted listening. Beyond great sound, the E40BT is designed for comfort, style, and durability. The Ergonomic headband and 360-degree swivel hinges allowfor a personalized fit and long-lasting comfort. The butter-soft, leatherette ear cups cradle your ears for all-day comfort and work to seal out distracting ambient sound. The E40BT’s sleek design and five unique color combinations make a visual statement that’s as striking as its sound.

Item# E40BTBLK

Device Compatibility

Bluetooth Yes

General Specifications

Bluetooth Transmitter Power less than 4dBm
Rated Power Input 30mW

Audio Specifications

Frequency Response 20Hz – 22kHz
Input Impedance 32 ohms
Maximum SPL 114dB @ 30mW

Speaker Specifications

Driver 40mm

Control and Connection Specifications

Microphone Sensitivity -42dBV/Pa @ 1kHz
Click here for a complete list of all specs for this product

Spec Sheet (EN)

752 KB
  • 1 Safety sheet
  • 1 USB aux cable for charging
  • 1 Straight aux cable
  • 1 JBL E40BT on-ear headphones
  • 1 Quick-start guide

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Synchros E40BT is rated NaN out of 5 by 106.
Rated 5 out of 5 by from Great fit, Sound, and style I Love them so far. I thought they didn't fit properly around my ears but It was user error (I'll admit it). I also like that nobody else has them in my gym. Always love the sound quality from the subs in the trunk to the headphones on my dome.
Date published: 2017-03-01
Rated 5 out of 5 by from Very good quality for little money This headphone hast got a very good quality. I thought it would do not last long when I saw the price but I got them over six months now.
Date published: 2017-02-18
Rated 5 out of 5 by from JBL has one of the best sound on earth! I am totally amazed by the quality even though the price is not high. The color is great and the sound is legendary. I like the purebass performance very much. Definitely one of the best wireless headphones out there.
Date published: 2017-02-04
Rated 5 out of 5 by from Battery life and sound I got these for Christmas, I took them out of the box and used them almost non-stop for about a month before they died, plus, the sound quality was absolutely fantastic, I would like a little bit more bass though, and the little screws on the front fell off, other than that 6/5 ⭐️
Date published: 2017-01-24
Rated 5 out of 5 by from Great product My wife love it, great sound, good quality product, and fast delivery
Date published: 2017-01-10
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I've had my E40BT headphones for 3 months now and they have worked great. Then today my right earphone will not admit sound through Bluetooth or using the hardwire. I've tried multiple devices and all results are the same. What can I do?

Asked by: Justin3xx
We're sorry to hear if you were having issues with our product. One last thing to do before submitting a case would be if your source has its own balance controls, please make sure that it is not favoring the let side. If this does not fix the issue, please submit a case at www.jbl.com/support-contact.html and our Customer Service Team will be more than happy to further assist you.
Answered by: Joe G at Customer Service
Date published: 2017-03-19

hi there, I have bought 4 of these for me and my friends ..... two of them had the same issue now which the left headphone is not working .... is that common and what would be the solution ?!!! thanks

Asked by: raee
Sorry to hear that you are having issues with the E40BT. Try a different source to isolate the issue. If your source device has a balance control please check and make sure that it is not set favoring the right side. I noticed that you are in Dubai. Please contact the store where you purchased it from and they will be able to assist you.
Answered by: Miko at Customer Service
Date published: 2017-03-13

Hello, I wasn't using my headphones for over one month, now I wanted to use them, but battery died. I started loading the battery,but the diode wasn't blinking with white and red light like usually and it didn't make the sound like usually. What happened?

Asked by: Lashike
The LED lights up red when charging, and changes color to white when charging is complete. To determine where the problem is, please plug it in at an alternate power source. I noticed that you are in Poznań, Polska. If the issue persists, please contact the store that you purchased your unit from and they should be able to assist you, or at least guide you to those who can.
Answered by: Joe G at Customer Service
Date published: 2017-03-09

Hi, may I know how can I charge the headphones to what power source. it doesn't indicated on the instructions how to charge or what power source is advisable though it was indicated 3 hours the charging duration.

Asked by: tutswhitelies
You can use any charger that has a minimum rating of 5 volts 1 amp for charging the E40bt.
Answered by: Memen at Customer Service
Date published: 2017-03-11

Im using these headphones with a IPhone 5c and I get 30 minutes of bluetooth connectivity, is there a problem on my end or is this common?

Asked by: EnigmaJester
What you have experienced can be explained. There is a high chance that it is because of the power saving feature that turned your E40BT to disconnect once it stopped sensing signal and/or vise versa, with your iPhone 5c standby mode feature, that once idle for a certain period will automatically disconnect or turn off any active app or connection. If this cannot be prevented, I noticed that you are located in Canada. Please contact your local store where it was purchased for further assistance.
Answered by: Joe G at Customer Service
Date published: 2017-03-01

I was able to use my E40BT headphones and the pairing process worked fine, but they became unpaired. Now I am unable to pair them again. I have rebooted my nano, and sometimes E40BT appears as a device but it will not finish pairing. Tips for pairing?

Asked by: PhilB
We are sorry to hear that you are having issues pairing your E40BT with your iOS devices. To place the E40BT in pairing mode, while the headphones are on, press and hold the Bluetooth button. The LED should start flashing, indicating that the E40BT is now ready to pair. Check back on your iPhone or nano and you should now be able to connect to the headphones.
Answered by: Memen at Customer Service
Date published: 2017-03-18

Hello, connected in bluetooth to my iPad, in audio-conferences, I can hear very well but my relatives almost don't. It's the same on the iPhone (telephone conversation). any way to increase the mic volume ?

Asked by: lucP
There is no way to increase the volume of the microphone on the E40BT. One thing we should check is on either device, see if the E40BT is selected as a media playback device or as a headphone. If the earlier was selected, select the headphone profile. This should fix your issue.
Answered by: Ren at Customer Service
Date published: 2017-02-17

How long do the headphone have to charge before they turn on? Also quick guide has bad instructions. nothing is marked as to what the buttons are!!! Very difficult to set up these headphones.May return them.

Asked by: who cares
We are sorry to hear that the Quick Start Guide does not work for your needs. The E40BT charges for 3 hours from 0-100% using the cable provided with the unit. We will be more than glad to assist you with any queries regarding the E40BT and its functions, simply submit a case at jbl.com/contactus and our Customer Service Team will be glad to provide assistance.
Answered by: Ren at Customer Service
Date published: 2017-02-25
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