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- Table of Contents
- Top
- Main Differences
- Design
- Sound
- Isolation
- Microphone
- Active Features
- Connectivity
- Comments
Samsung U Flex Wireless vs Sony WI-C400 Wireless
Side-by-Side Comparison
Products
Samsung U Flex Wireless
Sony WI-C400 Wireless
Tested using Methodology v1.3.1
Updated Dec 03, 2021 10:22 PM
SEE PRICE
Amazon.comTested using Methodology v1.4
Updated Jan 16, 2024 02:41 PM
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Amazon.com
TypeIn-ear
EnclosureClosed-Back
Noise CancellingNo
WirelessYes
TransducerDynamic
MicYes
TypeIn-ear
EnclosureClosed-Back
Noise CancellingNo
WirelessYes
TransducerDynamic
MicYes
Variants
- U Flex (Black)
- U Flex (White)
- WI-C400 (Black)
- WI-C400 (Blue)
- WI-C400 (White)
Our Verdict
Samsung U Flex Wireless
Sony WI-C400 Wireless
The Samsung U Flex Wireless are better headphones than the Sony WI-C400 Wireless. Their sound quality is noticeably better, especially in the bass range, and they offer some customization options if you have a Samsung device as well. While their battery life is slightly shorter, they take less than half the time to charge fully, and you can also use them when charging. They can connect to two devices, have better wireless range, and also lower latency. They also feel more durable and better-built than the Sony WI-C400. The Sonys have NFC compatibility that the U Flex don’t have.
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Black
U Flex
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WI-C400
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U Flex
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WI-C400
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WI-C400
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.0
6.7
Full Comparison
Design
Style
Design Picture 2
Type
In-ear
In-ear
Enclosure
Closed-Back
Closed-Back
Wireless
Yes
Yes
Transducer
Dynamic
Dynamic
Comfort
7.0
7.0
Comfort Picture
Weight
0.1 lbs
0.08 lbs
Clamping Force
0 lbs
0 lbs
Controls
7.6
6.6
Controls Picture
OS Compatibility
N/A
Not OS specific
Ease Of Use
Good
Decent
Feedback
Great
Good
Call/Music Control
Yes
Yes
Volume Control
Yes
Yes
Microphone Control
No
No
Channel Mixing
N/A
No
Noise Cancelling Control
N/A
No
Talk-Through
N/A
No
Additional Controls
Voice enabled controls
Bluetooth Sync
Breathability
9.2
9.3
Breathability After Picture
Avg.Temp.Difference
0.8 °C
0.7 °C
Portability
7.8
7.0
Portability Picture
L
6.7"
6.5"
W
5.5"
5.4"
H
0.4"
1"
Volume
15 in³
35 in³
Transmitter Required
N/A
No
Case
0.0
0.0
Case Picture
Type
No case
No case
L
N/A
N/A
W
N/A
N/A
H
N/A
N/A
Volume
N/A
N/A
Build Quality
7.0
6.5
Build Quality Picture
Stability
7.5
7.5
Stability Picture
Headshots 1
Angled Picture
Side Picture
Headshots 2
Front Picture
Rear Picture
Top
Top Picture
In The Box
In The Box Picture
Sound
Sound Profile
Frequency Response
Frequency Response
Bass Amount
-3.06 dB
-6.13 dB
Treble Amount
1.43 dB
-1.88 dB
Frequency Response Consistency
9.4
10
Consistency L
Consistency R
Avg. Std. Deviation
0.12 dB
0 dB
Raw Frequency Response
Raw FR L
Raw FR L
Raw FR R
Raw FR R
Bass Accuracy
7.9
5.5
Std. Err.
2.96 dB
5.94 dB
Low-Frequency Extension
29.54 Hz
68.25 Hz
Low-Bass
-4.59 dB
-11.52 dB
Mid-Bass
-2.64 dB
-2.33 dB
High-Bass
0.8 dB
3.05 dB
Mid Accuracy
8.5
8.4
Std. Err.
2.01 dB
2.07 dB
Low-Mid
0.32 dB
2.15 dB
Mid-Mid
-2.22 dB
-1.61 dB
High-Mid
1.04 dB
0 dB
Treble Accuracy
7.0
9.0
Treble
Treble
Std. Err.
4.32 dB
1.3 dB
Low-Treble
4.08 dB
0.76 dB
Mid-Treble
0.56 dB
0.92 dB
High-Treble
4.03 dB
-9.33 dB
Peaks/Dips
7.1
7.2
Peaks/Dips Graph
Peaks/Dips Graph
Peaks
1.85 dB
1.99 dB
Dips
1.5 dB
0.95 dB
Imaging
8.1
8.1
Phase Response
Weighted Group Delay
0.08
0.16
Weighted Amplitude Mismatch
1.36
1
Weighted Frequency Mismatch
2.9
3
Weighted Phase Mismatch
4.64
4.77
Passive Soundstage
1.3
1.3
PRTF
PRTF Accuracy (Std. Dev.)
N/A
N/A
PRTF Size (Avg.)
N/A
N/A
PRTF Distance
N/A
N/A
Openness
4.1
4.0
Acoustic Space Excitation
2.3
1.7
Virtual Soundstage
0.0
Virtual Soundstage
Head Modeling
No
Speaker Modeling
No
Room Ambience
No
Head Tracking
No
Virtual Surround
No App
Weighted Harmonic Distortion
7.4
6.9
Weighted Harmonic Distortion
WHD @ 90
0.298
0.598
WHD @ 100
0.176
0.301
Test Settings
Firmware
Unknown
Power
On
Connection
Unknown
Codec
SBC, 16-bit, 48kHz
EQ
No EQ
ANC
No ANC
Tip/Pad
Silicone (small)
Microphone
Integrated
Isolation
Noise Isolation
5.7
6.0
Noise Isolation
Isolation Audio
Overall Attenuation
-13.8 dB
-16.07 dB
Noise Cancelling
No
No
Bass
-1.22 dB
-0.69 dB
Mid
-14.78 dB
-13.69 dB
Treble
-26.78 dB
-34.98 dB
Leakage
8.2
8.5
Leakage Audio
Overall Leakage @ 1ft
32.5 dB
30.12 dB
Microphone
Microphone Style
Integrated
Yes
Yes
In-Line
No
No
Boom
No
No
Detachable Boom
N/A
No
Mic
Yes
Yes
Recording Quality
7.1
6.1
Microphone Frequency Response
Recorded Speech
LFE
289.23 Hz
164.69 Hz
FR Std. Dev.
4.52 dB
2.11 dB
HFE
7,896.12 Hz
1,836.52 Hz
Weighted THD
1.039
3.049
Gain
22.95 dB
43.18 dB
Noise Handling
6.7
6.8
Speech + Pink Noise
Speech + Subway Noise
SpNR
18.52 dB
19.23 dB
Active Features
Battery
7.5
6.5
Battery Type
Rechargable
Rechargable
Continuous Battery Life
11.5 hrs
17.5 hrs
Additional Charges
0
0.0
Total Battery Life
11.5 hrs
17.5 hrs
Charge Time
1.8 hrs
4 hrs
Power-Saving Feature
Standby mode
No
Audio While Charging
Yes
No
Passive Playback
No
No
Charging Port
micro-USB
micro-USB
App Support
6.0
0.0
App Picture
App Name
Samsung Level
No App
iOS
No
No
Android
Yes
No
macOS
N/A
No
Windows
N/A
No
Equalizer
Graphic + Presets
No
ANC Control
No
No
Mic Control
No
No
Room Effects
Yes
No
Playback Control
Yes
No
Button Mapping
No
No
Surround Sound
N/A
Surround Support
No
Connectivity
Bluetooth
8.4
7.1
Bluetooth Version
4.2
4.2
Multi-Device Pairing
2 Devices
No
NFC Pairing
No
Yes
Line Of Sight Range
160 ft
69 ft
PC Latency (SBC)
146 ms
239 ms
PC Latency (aptX)
N/A
N/A
PC Latency (aptX HD)
N/A
PC Latency (aptX-LL)
N/A
N/A
iOS Latency
106 ms
Android Latency
128 ms
Non-Bluetooth Wireless
0.0
0.0
Non-BT Line Of Sight Range
N/A
N/A
Non-BT Latency
N/A
N/A
Wired
0.0
0.0
Cable Picture
Analog Audio
N/A
No
USB Audio
N/A
No
Detachable
No
No
Length
N/A
N/A
Connection
N/A
No Wired Option
Wired Latency
N/A
Analog/USB Audio Latency
N/A
PC / PS4 Compatibility
PC/PS4 Analog
No
No
PC/PS4 Wired USB
No
No
PC/PS4 Non-BT Wireless
No
No
Xbox One Compatibility
Xbox One Analog
No
No
Xbox One Wired USB
No
No
Xbox One Non-BT Wireless
No
No
Base/Dock
0.0
0.0
Type
N/A
No Base/Dock
USB Input
N/A
No
Line In
N/A
No
Line Out
N/A
No
Optical Input
N/A
No
RCA Input
N/A
No
Dock Charging
N/A
No
Power Supply
N/A
No Base/Dock
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Black
U Flex
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WI-C400
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U Flex
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WI-C400
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WI-C400
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Samsung U Flex Wireless
Sony WI-C400 Wireless
Comments
Samsung U Flex Wireless vs Sony WI-C400 Wireless: Main Discussion
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