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JBL Synchros S400bt Headphones Review

Rating: 4.5 (out of 5)

The JBL Synchros S400bt Headphones are high quality stereo headphones from the JBL audio JBL Synchros S400bt company. They have encompassed Bluetooth technology with advanced aptx technology and touch sensitive controls which enable the user to play back audio and wirelessly take calls from any Bluetooth enabled device. They are characterized by good audio quality, ample sturdiness and portability.

Click here to see the current pricing for the S400bt headphones…

Design features of the JBL Synchros S400bt headphones

The Synchros s400bt headphones feature advanced aptx and Bluetooth 3.0 technology with NFC touch-sensitive controls. The right ear cup is embedded with the NFC chip on its side to enable it to pair with the NFC-enabled devices. They sync up with other Bluetooth devices very easily, and the freedom this gives you, along with the quality of the sound makes the S400bt headphones a great wireless option.

The collapsible design of the headphones make them perfect for the mobile user. They are designed in a way that they are easy to fold up, this condenses the size of the headphones making them easy to carry around with you. The ear cups are covered with a thick foam padding while the headband has a thin layer of padding to enhance comfort while they are being worn.

The charging mechanism included with these headphones is very efficient and well designed. The charging port is incorporated in the headset jack. The Synchros s400bt headphones therefore require the proprietary USB cable for charging.

JBL Synchros S400bt headphones

The device has touch-sensitive controls on the left side. Different taps and finger gestures execute different functions. For instance swiping up or down increases or decreases the volume respectively. On the other hand swiping left or right either advances or reverses the tracks while tapping on the surfaces pauses or plays the track. The ring has incorporated an LED light trail which is activated whenever the user interacts with the touch-sensitive surface.


The Left ear cup has tiny power and Bluetooth buttons and a 3.5 mm jack. The Bluetooth button helps to disconnect the device from a paired device. Note that pressing the button for long puts it in a pairing mode while the cable enables the device to function with a wired source.

Sound quality

The earphones have an echo cancellation technology which ensures good audio quality with JBL’s appealing pure base performance. There are no major sound distortions. The ear cushions also help in cushioning against any background noises which in turn enhances the earphones’ sound quality.


The Bluetooth technology enables them to work with different Bluetooth enabled devices while JBL-Synchros-S400bt-5athe cables enable them to be compatible with different wired sources. With the wireless capabilities, it is possible to wirelessly receive calls once the device is synchronized with the phone.

Additional features

The headphones have a built-in battery that provides approximately 15-20 hours of music playback or talk time and can be recharged using a USB charging cable. The ear cups are designed with a 3D-axis rotation capability which enhances portability and ergonomic fit. They also have small microphone openings which enable them to work as microphones. Each side of the headband can easily slide and be adjusted to varied levels of fit. The leather cushions to ensure comfort
as well as a steel headband to give the device ample steadiness.

Last thoughts on the JBL Synchros S400bt Headphones

The design of these headphones is pretty unique, and they can be adjusted to different fits depending on the size of the head. For anyone who loves sound quality, comfort and convenience, the JBL Synchros s400bt headphones offer a really good option, and at an affordable price too.

Click here to purchase the S400BT headphones on…



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