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JBL Synchros S400BT

alaTest has collected and analyzed 42 reviews of JBL Synchros S400BT. The average rating for this product is 3.7/5, compared to an average rating of 4.0/5 for other Headphones for all reviews. Reviews about the portability and bass quality are on the whole positive. The design and durability also get good feedback, but the price and usability get mixed reviews.

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 86/100 = Very good quality.

Review analysis

(Based on 42 reviews)

Expert Reviews  

User Reviews  

Showing 7 review(s)

Expert Reviews User Reviews


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Showing 1 - 7 of 7 Show Reviews: in English | in other languages (8)

Expert review by : Tim Gideon (

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 love the idea of monstrous bass response, but find that the Synchros S400BT is a bit out of your price range, the SOL Republic Tracks Air is a slightly-less expensive option, while the Outdoor Technology DJ Slims is a solid, inexpensive...

Mar, 2014

Expert review by : Tom Andry (

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.

Jan, 2014

Expert review by : John V. (

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...

Aug, 2014

Expert review by : Showpiece (

JBL Synchros S400BT Bluetooth Headphones [Review]


One of the most influential letters of the alphabet and sound JBL are at it again. As one of the pure quality sounds in headphones, speakers, etc in the game, JBL blesses you with a beautiful option of listening to your favorite music via Bluetooth....

Mar, 2014

Expert review by : Scott Schaen (

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

Mar, 2014

Expert review by : What Hi-Fi? (

JBL Synchros S400BT review


Solid build ; Weighty bass ; Exciting sound

Loose fitting, unintuitive touch-controls ; Overbearing bass ; Lack of detail and refinement

A patchy performance from the JBLs: the fit isn’t quite right and neither is the sound

Jan, 2015

Expert review by : Cameron Faulkner (

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

With cheaper wireless alternatives available, the S400BT doesn't put forth the winning argument it needs to justify a higher price.

Jan, 2015

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