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Synchros E40BT is rated 3.4 out of 5 by 134.
Rated 5 out of 5 by from Great battery life! I owned these a couple months ago, after a few weeks started to lose some parts, and started to feel a little fragile. Despite, are the best headphones. I ever had.
Date published: 2017-10-20
Rated 5 out of 5 by from Great headphones... I ordered these with a notice that they were back ordered. Low and behold, they showed up earlier than scheduled. Thanks Harmon. I tried a different sites E40BT's, and one side died 2 days later. So I found these on Harmon site. Ecstatically happy.
Date published: 2017-09-29
Rated 5 out of 5 by from Great product!!! Bought to use with iPhone 7. Sound is amazing and bass response is unreal!! Still not the biggest fan of "wireless", but JBL has done a great job with these!!
Date published: 2017-08-04
Rated 5 out of 5 by from 5 Really good but not so comfortable and the sound is really really clear
Date published: 2017-06-23
Rated 5 out of 5 by from awesome sound I love Coach products style etc and JBL rocks the combination together is unreal!
Date published: 2017-05-25
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hi, i have jbl E40BT and one side has stop working?

Asked by: eyalm
I read a lot of people with the same problem. First off let me say that I love the sound and comfort of these headphone. However mine did the same thing, I exchanged them under warranty at Canadian Tire, but after a few months the second pair did the same thing, worked great at first then one side stopped working. I am the type of guy that likes to take stuff apart to learn how and why things work, So I opened the headphones and found a wire that was not soldered or got pulled off it's soldered spot from moving/adjusting the headphones around. I re-soldered the wire and reassembled the headphones using hot glue to hold the wires in place so they can no longer get tension when adjusting the headband, They HAVE been working perfectly for over a year now. " DO NOT " open them if they are under warranty, I hope this helps any other handymen out there, and maybe JBL should look into their assembly line.
Answered by: Paul V
Date published: 2017-10-13

How do I charge the headphones? I put it on the charger for a few hours but doesn't seem to want to charge if anyone can please help me I'd appreciate it 

Asked by: ODiaz
I figured out that the 2.5 mm jack has to be fully pushed in hard into the left ear cup. It's a small flaw that had me confused for an hour. I also though my headphones were defective.
Answered by: MARK123
Date published: 2016-05-30

I have a pair of JBL Synchros E40 BT and ive enjoyed using them for about a year but now theres no sound i the left ear piece. What do i do now?

Asked by: SageGT
I don't think this is a "set-up" problem because I had the same problem.  It began intermittently and soon failed.  After carefully removing the left ear-fusion, support, and speaker itself I discovered that one wire to the speaker had become disconnected from the printed circuit board.  The two wires to the speaker are attached near to corner of a circuitboard and was soldered back on.  Use care if you try this as the parts that hold the speaker piece on is very fragile and connected in what appears to be in a backward fashion.  This also requires experienced soldering techniques.  Be careful.
Answered by: BuddyinBC
Date published: 2017-03-15

How to turn off E40BT?

Asked by: Bart33
just pressing once doesn't do a thing... Therefore i press it for more time and the red led starts blinking. After that when i press once it turns off
Answered by: turntodesp
Date published: 2017-10-20

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 "forgot" the E40BT headphones from the "My Devices" 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 "Other Devices" list below the "My Devices" list in the Bluetooth settings of your phone. Select the device you're trying to pair. Hopefully this helps!
Answered by: JonathanM
Date published: 2017-09-24

where can I purchase a replacement charger for this product

Asked by: Deshops99
Ok so if the charger was available at most electronics stores you would be correct however it is not !!!! I'm at a technology store that is second to none when it comes to electronic devices having the latest and greatest technological devices they could be found and they do not sell  however you can get them on Amazon for about nine dollars 
Answered by: Oboy
Date published: 2016-11-30

I need a red aux cable for my headphones.  And a charger too.  

Asked by: Jen_atx
I inquired about a charger as well and they don't make them anymore, your best bet is to get one on amazon.. if you can find the right one..its hit and miss lol I've already got one that's that wrong one..I'm waiting for try #2 to get here lol I can share the link they sent me if you'd like?
Answered by: Kris842
Date published: 2016-11-30

Is there a sound app for the iphone to support the E40BT

Asked by: Stabbers
A sound app is not needed. The E40BT is 100% compatible with an iphone. Just turn on the EB40T and the bluetooth function on your iphone. The E40BT will appear in the bluetoot setup of your iphone and connect automatically as bluetooth speaker within a few seconds. That's all. Very easy.
Answered by: Hermy
Date published: 2016-11-30
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