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Synchros E40BT


Bluetooth® on-ear Headphones featuring JBL signature sound, PureBass performance and wireless connectivity with music sharing feature

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On-ear stereo headphones featuring Bluetooth® connectivity with ShareMe music sharing.

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 with PureBass performance, treating your ears to expansive frequency response (10hz to 24KHz) with full, undistorted bass. Bluetooth technology allows wireless connectivity with phones, tablets and music players, while giving you single-button access to crystal clear, connection to your mobile phones, using echo-cancelation technology. 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 allow for 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# E40BTWHT

Device Compatibility

Bluetooth Yes

General Specifications

Bluetooth Transmitter Power <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)

English 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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1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

Call us: 1.800.336.4525

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Synchros E40BT is rated NaN out of 5 by 109.
Rated 5 out of 5 by from JBL SYNCHROS after my dog eat the charging cable, I just ordered a new cable from e-bay and great its charging and they work great.
Date published: 2017-03-23
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
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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
Hey Phil, I had the same issue with my iPhone. To resolve this I went to Bluetooth settings, removed or &quot;forgot&quot; the E40BT headphones from the &quot;My Devices&quot; list, turn off bluetooth, turn bluetooth back on, and re-paired (make sure bluetooth button is flashing on headphones while trying to pair). The E40BT headphones should appear under the &quot;Other Devices&quot; list below the &quot;My Devices&quot; list in the Bluetooth settings of your phone. Select the device you're trying to pair. Hopefully this helps!
Answered by: JonathanM
Date published: 2017-03-26

I would like to know if you can hook up to a tv with the E40BT

Asked by: grw2002
If your TV is Bluetooth enabled and supports or is setup to support Stereo Audio Bluetooth connection, then the E40BT would be able to connect to your TV. Put the E40BT in pairing mode. Scan for BT devices on your TV and you will find the E40BT then connect. You can also hook up the E40BT using a 3.5mm audio cable to your TV, as long as your TV has an analog audio output. It will usually be called Audio Output, Headphone, or Line Out.
Answered by: Miko at Customer Service
Date published: 2017-03-20

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: 2017-03-26

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 Pozna&#324;, 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: 2017-03-26

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

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
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