Name: CXL 400
Brand: Sennheiser
SKU: 72047
Rating: 4.3 (38 reviews)

4.3

based on all reviews

Sennheiser CX 400BT is mostly good
rhythm track is presented with gusto and insight
The controls are responsive and rarely require extra taps

protrude out of your ears just a tiny a bit
sparkle comes at the expense of a little refinement
flip-top battery case is tiny

Impedance: 16 Ω
Frequency range: , 21000 Hz
Acoustic design: Closed
Sound output: Stereo
Style: In-Ear
Connectivity technology: Wired

Sennheiser CXL 400 - Pros & Cons

Sennheiser CX 400BT is mostly good
rhythm track is presented with gusto and insight
The controls are responsive and rarely require extra taps
rich bass depth
Uni-Buds have better battery life and comfort
CX 400BT handles video calls great
sounds warm
smooth
detailed
a really solid mid-range set of TWS earphones
build quality and design
well-built and customizable truly wireless headphones
comfortable and well-built
mid accuracy is excellent
cx-400 are amazingly secure
frequency response consistency is excellent
Sony are more comfortable
low and high-mids are relatively flat and neutral
Always Enabled Necessary cookies are absolutely essential for the website to function properly
a clean
clear and detailed sound
sound quality
competitive battery life and a healthy range of features
outstanding sound quality and long-lasting comfort
Pairing is swift and proves secure even over quite long distances
big
detailed and easy-to-follow sound
CX400BT are equally accomplished
remain secure and comfortable for hours on end
They sound open and articulate
Sennheisers' best is really very good indeed

protrude out of your ears just a tiny a bit
sparkle comes at the expense of a little refinement
flip-top battery case is tiny
jumbled
incomplete control panels
support NFC or multi-device pairing
Disappointing battery performance
parametric EQ since you can only adjust a single band frequency
No cherry-picked units sent by brands
watching videos comes with strange problems
earbuds
too
are bulkier than most competitors
switch back to my phone without manually pairing the headphones again
earbuds dropped in price - rather quickly
above-average battery life
audio isn't always in sync with video on apps like YouTube
overplay their hand is at the top of the frequency range
Hard plastic makes up the bulk of the construction
lack of Low Latency functionality
The charging case is equally prosaic in its materials
bigger and heavier than many alternatives
on expensive earphones can sting a little bit
the controls are split up between each side
older songs may be a little more difficult to pick out bass instruments
lacking clarity
my voice was audible during the recording
It does not store any personal data
no multi-point pairing here
smartphone gaming does still have a noticeable sound delay
but lose the detachable extension cable
Bass may be favoured too heavily for some listeners

Sennheiser CXL 400 - Technical Overview

	Poor	Average	Good	Excellent
Driver size	3.5 mm Best: Hauppauge XFones Driver size: 400 mm
Impedance	16 Ω Best: Stax SR-L500 Impedance: 145000 Ω

Sennheiser CXL 400 - Full Specifications

Sound output	Stereo
Style	In-Ear
Connectivity technology	Wired
Headset (integrated/enclosed microphone)	no

Impedance	16.0 Ω
Frequency range	< 21000
Driver technology	Dynamic
Driver size	0.14 in
Total harmonic distortion (THD)	0.2 %

Battery operated	no

Colour of product	Black Blue Red Silver White
Acoustic design	Closed
Attachment type	Ear canal

Cable length	0.4
Type of connector	3.5mm
Detachable cable	no

Sennheiser CXL 400 - Q&A

Do you have a question about the product?
Type your nick
Your question might be answered by sellers, manufacturers, or customers who bought this product.

Sennheiser CXL 400 Sennheiser - Editorial Reviews (7)

4.2

Based on 7 reviews

Sennheiser CXL 400 Sennheiser CX 400BT Review

PCMAG

Published: 23.10.2020

Sennheiser CX 400BT Review

4.0

The Sennheiser CX 400BT earphones deliver some of the best on-ear controls and audio performance you'll find in a true wireless pair.

Tom's Guide

Published: 25.01.2021

Sennheiser CX 400BT review

4.0

The Sennheiser CX 400BT wireless earbuds sound great, even without noise cancellation

whathifi

Published: 26.02.2021

Sennheiser CX 400BT review

5.0

These true wireless earbuds are excellent value for money

Sennheiser CXL 400 Sennheiser CX 400BT True Wireless review

SoundGuys

Published: 08.03.2022

Sennheiser CX 400BT True Wireless review

Fans of true wireless earphones looking for audio quality above all else should definitely take a look at the Sennheiser CX 400BT.

RTINGS.com

Published: 25.11.2020

Sennheiser CX 400BT True Wireless Review

3.6

The Sennheiser CX 400BT True Wireless are sleek in-ears that resemble the Sennheiser MOMENTUM True Wireless 2 in look and performance. They have a similarly warm...

TechRadar

Published: 04.09.2020

Sennheiser CX 400BT True Wireless review

4.5

‘Affordable’ Sennheisers have Apple AirPods firmly in their sights

Sennheiser CXL 400 Sennheiser CX 400 sound-isolating earphones

CNET

Published: 22.02.2008

Sennheiser CX 400 sound-isolating earphones

You can spend hundreds of pounds on earphones, but if you're looking for a decent upgrade without spending loads of dosh, you could spend less than £40 on these comfortable, quality Sennheiser CX 400s. Good all-'rounders, these 'phones could suit your needs down to the ground