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JBL Synchros S400BT

alaTest has collected and analyzed 7 reviews of JBL Synchros S400BT. The average rating for this product is 4.0/5, compared to an average rating of 3.9/5 for other Headphones for all reviews. People really like the portability and bass quality. The design and durability also get good opinions, but many are less positive about the price. There are some mixed comments about the comfort and usability.

sound, durability, design, bass quality, portability


We analyzed user and expert ratings, product age and more factors. Compared to other Headphones the JBL Synchros S400BT is awarded an overall alaScore™ of 95/100 = Excellent quality.

Review analysis

(Based on 7 reviews)

Expert Reviews  

Review Ratings

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Expert Reviews User Reviews
Showing 1 - 5 of 5 Show Reviews: in English | in other languages (2)

Expert review by:

JBL Synchros S400BT


The JBL Synchros S400BT is a Bluetooth headphone pair that delivers absolutely thunderous bass in a comfortable design.

Powerful, distortion-free audio performance with intense bass response. Detachable cable for optional wired listening. Exceptionally comfortable, even over long listening sessions

Highly sculpted sound signature. Easy to accidentally pause music or place unintentional phone calls

If you're looking for flat response-style headphones that color the sound very little and offer an accurate frequency response, let me save you some time: No need to read this review. The JBL Synchros S400BT is aimed at those of you who live for...

Expert review by:

JBL Synchros S400BT On-Ear and J46BT In-Ear Bluetooth Headphones Preview


JBL' J46BT in-ear and Synchros S400BT on-ear headphones have Bluetooth wireless streaming, in-line controls, and mics for answering calls at reasonable prices. Read on for our full impressions.

JBL's new Bluetooth headphones have everything you'd expect from wireless headphone, plus a little more. The relatively low $99 price point of the in-ear JBL J46BT will attract more than a few consumers. The external lights, capacitive control, NFC...

Expert review by:

JBL Synchros S400BT Review


Audio aficionados know the name JBL, a company long known for its various audio electronics products – spanning from amplifiers all the way to loudspeakers. They've been in the business of making mobile audio accessories as well, like its diversified...

Durable construction ; LED light trail gives it a slick look ; It’s able to fold up and occupy very little space ; Lot of strong bass with its audio quality ; Touch sensitive controls

Proprietary charging port ; High tones are subdued ; Not enough padding around the headband ; Weak Bluetooth range

JBL has a doozy thing here with the Synchros S400BT, a pair of Bluetooth headphones that’s rich with features. Seriously, we’re excited to know that it packs modern amenities that are befitting of a high-end pair of headphones – plus, its durable, yet...


Expert review by:

JBL Synchros S400BT On-Ear Headphone Review


The Synchros S400BT is JBL's latest edition to their wireless bluetooth headphone lineup. The S400BTs are on-ear headphones made of a beautiful blend of metal, leather, plastic, and LEDs. In addition to high fidelity sound quality and great...

Overly sensitive controls, Weak bluetooth range, Proprietary headphone and charging cables, Poor microphone quality for calls, Pricey, Loose fit

Expert review by:

JBL Synchros S400BT review


Incredible sound and design knocked down by connectivity issues

Magnificent design and sound ; Long battery-life ; Comfortable

Spotty Bluetooth signal strength ; Price is a bit high

Product Specifications


Microphone Boom Arm: No
Multi Compatible Gaming Function: No
Mute Control: No
Sound System:STEREO
Volume Control: No


Bluetooth: Yes
Connection:ONE 3.5 mm Plug
USB Dongle: No

General Features

Compatibility:for 4 and more brands