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  1. Home
  2. Headphones
  3. Compare

Anker Soundcore Space A40 Truly Wireless vs OnePlus Buds 4

Which Headphones Are Better?

    Top
    Main Differences
    Sound
      Sound ProfileFrequency Response ConsistencyRaw Frequency ResponseBass Profile: Target ComplianceMid-Range Profile: Target ComplianceTreble Profile: Target CompliancePeaks/DipsStereo MismatchCumulative Spectral DecayPRTFHarmonic DistortionElectrical AspectsVirtual SoundstageTest Settings
    Design
      StyleComfortControlsPortabilityCaseBuild QualityStabilityHeadshots 1Headshots 2TopIn The Box
    Isolation
      Noise Isolation - Full RangeNoise Isolation - Common ScenariosNoise Isolation - Voice HandlingANC Wind HandlingLeakage
    Microphone
      Microphone StyleRecording QualityNoise Handling
    Active Features
      BatteryApp Support
    Connectivity
      Wired ConnectionBluetooth ConnectionWireless Connection (Dongle)PC CompatibilityPlayStation CompatibilityXbox CompatibilityBase/Dock
    Comments

Products

Anker Soundcore Space A40 Truly Wireless
OnePlus Buds 4

Tested using Methodology v2.2

Updated Jun 16, 2026 01:47 PM

SEE PRICE
Amazon

Tested using Methodology v2.2

Updated May 19, 2026 12:56 PM

SEE PRICE
Amazon
Anker Soundcore Space A40 Truly Wireless Picture

Track

OnePlus Buds 4 Picture

Track

TypeIn-ear
Noise CancellingYes
EnclosureClosed-Back
Bass Amount
Slightly Emphasized (1 dB)
WirelessTruly Wireless
Treble Amount
Underemphasized (-5 dB)
MicYes
Sound Signature
Warm
TypeIn-ear
Noise CancellingYes
EnclosureClosed-Back
Bass Amount
Very Emphasized (5 dB)
WirelessTruly Wireless
Treble Amount
Balanced (0 dB)
MicYes
Sound Signature
Warm
  1. Recommended in 17 articles:
  2. Wireless Earbuds
  3. Noise Cancelling Earbuds
  4. In-Ears
  5. 14
  1. Recommended in 4 articles:
  2. Wireless Earbuds
  3. In-Ears
  4. Earbuds For Phone Calls
  5. 1

Our Verdict

Anker Soundcore Space A40 Truly Wireless

OnePlus Buds 4

The OnePlus Buds 4 and Anker Soundcore Space A40 Truly Wireless are relatively affordable pairs of earbuds with strong noise cancelling. But on balance, the Anker are the better value pair. Their ANC is a little stronger overall; they last much longer per charge, and their case adds four extra charges and wireless charging. The OnePlus have the edge for fit, with better stability and superb frequency response consistency, and their mic is less troublesome than the Anker's poor, far-away sounding mic. Still, for most people, the Anker's superior ANC and battery life make them the pair to choose. 

GIFT THIS COMPARISON

0 

Variants

  • Soundcore Space A40 (Black)
  • Soundcore Space A40 (Blue)
  • Buds 4 (Storm Gray)
  • Buds 4 (Zen Green)

Review

See Anker Soundcore Space A40 Truly Wireless Review
See OnePlus Buds 4 Review
26 
2 

Check Price

Black
Soundcore Space A40
SEE PRICE
Amazon
Storm Gray
Buds 4
SEE PRICE
Amazon
Blue
Soundcore Space A40
SEE PRICE
Amazon
Zen Green
Buds 4
SEE PRICE
BestBuy.com
White
Soundcore Space A40
SEE PRICE
Amazon
 

Main Differences for
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Full Comparison

Sound

Sound Profile 
 

Sound Profile  

Anker Soundcore Space A40 Truly Wireless Sound Profile Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Sound Profile Sample

SAMPLE

JOIN NOW

for pictures & test results

Normalization Frequency 
 

Lock Hz
Lock Hz

Bass Amount 
 

Locked
Locked

Treble Amount 
 

Locked
Locked

Sound Signature 
 

Locked
Locked

Frequency Response Consistency 
 

N/A
N/A

Consistency L  

Anker Soundcore Space A40 Truly Wireless Consistency L Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Consistency L Sample

SAMPLE

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for pictures & test results

Consistency R  

Anker Soundcore Space A40 Truly Wireless Consistency R Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Consistency R Sample

SAMPLE

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for pictures & test results

Std. Deviation 
 

Lock dB
Lock dB

Raw Frequency Response 
 

Raw FR L  

Anker Soundcore Space A40 Truly Wireless Raw FR L Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Raw FR L Sample

SAMPLE

JOIN NOW

for pictures & test results

Raw FR R  

Anker Soundcore Space A40 Truly Wireless Raw FR R Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Raw FR R Sample

SAMPLE

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for pictures & test results

Bass Profile: Target Compliance 
 

N/A
N/A

Bass Profile: Target Compliance  

Anker Soundcore Space A40 Truly Wireless Bass Profile: Target Compliance Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Bass Profile: Target Compliance Sample

SAMPLE

JOIN NOW

for pictures & test results

RMS Deviation From Target 
 

Lock dB
Lock dB

Low-Frequency Extension 
 

Lock Hz
Lock Hz

Low Bass 
 

Lock dB
Lock dB

Mid Bass 
 

Lock dB
Lock dB

High Bass 
 

Lock dB
Lock dB

Mid-Range Profile: Target Compliance 
 

N/A
N/A

Mid-Range Profile: Target Compliance  

Anker Soundcore Space A40 Truly Wireless Mid-Range Profile: Target Compliance Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Mid-Range Profile: Target Compliance Sample

SAMPLE

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for pictures & test results

RMS Deviation From Target 
 

Lock dB
Lock dB

Low Mid 
 

Lock dB
Lock dB

Mid-Mid 
 

Lock dB
Lock dB

High Mid 
 

Lock dB
Lock dB

Treble Profile: Target Compliance 
 

N/A
N/A

Treble Profile: Target Compliance  

Anker Soundcore Space A40 Truly Wireless Treble Profile: Target Compliance Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Treble Profile: Target Compliance Sample

SAMPLE

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for pictures & test results

RMS Deviation From Target 
 

Lock dB
Lock dB

Low Treble 
 

Lock dB
Lock dB

Mid Treble 
 

Lock dB
Lock dB

High Treble 
 

Lock dB
Lock dB

Peaks/Dips 
 

N/A
N/A

Peaks/Dips Graph 
 

Anker Soundcore Space A40 Truly Wireless Peaks/Dips Graph Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Peaks/Dips Graph Sample

SAMPLE

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for pictures & test results

Peaks 
 

Lock dB
Lock dB

Dips 
 

Lock dB
Lock dB

Stereo Mismatch 
 

N/A
N/A

Frequency Response Mismatch  

Anker Soundcore Space A40 Truly Wireless Frequency Response Mismatch Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Frequency Response Mismatch Sample

SAMPLE

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for pictures & test results

Phase Response Mismatch  

Anker Soundcore Space A40 Truly Wireless Phase Response Mismatch Sample

SAMPLE

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OnePlus Buds 4 Phase Response Mismatch Sample

SAMPLE

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Weighted Amplitude Mismatch 
 

Lock dB
Lock dB

Weighted Frequency Response Mismatch 
 

Lock dB
Lock dB

Weighted Phase Mismatch 
 

Lock°
Lock°

PRTF 
 

N/A
N/A

PRTF  

Anker Soundcore Space A40 Truly Wireless PRTF Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 PRTF Sample

SAMPLE

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for pictures & test results

PRTF Accuracy (RMS Deviation) 
 

N/A
N/A

PRTF Size (Avg.) 
 

N/A
N/A

PRTF Distance 
 

N/A
N/A

Harmonic Distortion 
 

N/A
N/A

Harmonics Levels  

Anker Soundcore Space A40 Truly Wireless Harmonics Levels Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Harmonics Levels Sample

SAMPLE

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for pictures & test results

THD Ratio  

Anker Soundcore Space A40 Truly Wireless THD Ratio Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 THD Ratio Sample

SAMPLE

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for pictures & test results

WHD @ 94 dB SPL 
 

Lock%
Lock%

WHD @ 104 dB SPL 
 

Lock%
Lock%

Electrical Aspects 
 

Impedance  

Anker Soundcore Space A40 Truly Wireless Impedance Sample

SAMPLE

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for pictures & test results

OnePlus Buds 4 Impedance Sample

SAMPLE

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for pictures & test results

Sensitivity @1kHz-1V 
 

N/A
N/A

Bluetooth Max SPL 
 

Lock dB
Lock dB

Virtual Soundstage 
 

N/A
N/A

Virtual Soundstage  

Anker Soundcore Space A40 Truly Wireless Virtual Soundstage Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Virtual Soundstage Sample

SAMPLE

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for pictures & test results

Head Modeling 
 

Locked
Locked

Speaker Modeling 
 

Locked
Locked

Room Ambience 
 

Locked
Locked

Head Tracking 
 

Locked
Locked

Virtual Surround 
 

Locked
Locked

Test Settings 
 

Firmware 
 

Locked
Locked

Power 
 

Locked
Locked

Connection 
 

Locked
Locked

Codec 
 

Locked
Locked

Test Instrument  

Locked
Locked

EQ 
 

Locked
Locked

ANC 
 

Locked
Locked

Tip/Pad 
 

Locked
Locked

Microphone 
 

Locked
Locked
Design

Style  

Design Picture 2  

Anker Soundcore Space A40 Truly Wireless Design Picture 2 Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Design Picture 2 Sample

SAMPLE

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for pictures & test results

Type  

Locked
Locked

Enclosure  

Locked
Locked

Wireless  

Locked
Locked

Transducer  

Locked
Locked

Comfort 
 

N/A
N/A

Comfort Picture  

Anker Soundcore Space A40 Truly Wireless Comfort Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Comfort Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Weight  

Lock lbs
Lock lbs

Clamping Force 
 

Lock lbs
Lock lbs

Controls 
 

N/A
N/A

Controls Picture  

Anker Soundcore Space A40 Truly Wireless Controls Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Controls Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OS Compatibility 
 

Locked
Locked

Ease Of Use  

Locked
Locked

Feedback  

Locked
Locked

Call/Music Control  

Locked
Locked

Volume Control  

Locked
Locked

Microphone Control  

Locked
Locked

Channel Mixing 
 

Locked
Locked

Noise Cancelling Control  

Locked
Locked

Talk-Through 
 

Locked
Locked

Additional Controls  

Locked
Locked

Portability 
 

N/A
N/A

Portability Picture  

Anker Soundcore Space A40 Truly Wireless Portability Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Portability Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

L  

Lock" (Lock cm)
Lock" (Lock cm)

W  

Lock" (Lock cm)
Lock" (Lock cm)

H  

Lock" (Lock cm)
Lock" (Lock cm)

Volume  

Lock in³ (Lock cm³)
Lock in³ (Lock cm³)

Transmitter Required  

Locked
Locked

Case 
 

N/A
N/A

Case Picture  

Anker Soundcore Space A40 Truly Wireless Case Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Case Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Type  

Locked
Locked

L  

Lock" (Lock cm)
Lock" (Lock cm)

W  

Lock" (Lock cm)
Lock" (Lock cm)

H  

Lock" (Lock cm)
Lock" (Lock cm)

Volume  

Lock in³ (Lock cm³)
Lock in³ (Lock cm³)

Build Quality 
 

N/A
N/A

Build Quality Picture  

Anker Soundcore Space A40 Truly Wireless Build Quality Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Build Quality Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Stability 
 

N/A
N/A

Stability Picture  

Anker Soundcore Space A40 Truly Wireless Stability Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Stability Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Headshots 1  

Angled Picture  

Anker Soundcore Space A40 Truly Wireless Angled Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Angled Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Side Picture  

Anker Soundcore Space A40 Truly Wireless Side Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Side Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Headshots 2  

Front Picture  

Anker Soundcore Space A40 Truly Wireless Front Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Front Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Rear Picture  

Anker Soundcore Space A40 Truly Wireless Rear Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Rear Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Top  

Top Picture  

Anker Soundcore Space A40 Truly Wireless Top Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Top Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

In The Box  

In The Box Picture  

Anker Soundcore Space A40 Truly Wireless In The Box Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 In The Box Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Isolation

Noise Isolation - Full Range 
 

N/A
N/A

Noise Isolation - Full Range Graph  

Anker Soundcore Space A40 Truly Wireless Noise Isolation - Full Range Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Noise Isolation - Full Range Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

Noise Cancelling  

Locked
Locked

Overall Attenuation 
 

Lock dB
Lock dB

Bass 
 

Lock dB
Lock dB

Mid 
 

Lock dB
Lock dB

Treble 
 

Lock dB
Lock dB

Noise Isolation - Common Scenarios 
 

N/A
N/A

Noise Isolation - Common Scenarios Graph  

Anker Soundcore Space A40 Truly Wireless Noise Isolation - Common Scenarios Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Noise Isolation - Common Scenarios Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

Airplane Noise Attenuation 
 

Lock dB
Lock dB

Airplane Noise Isolation Audio 
 

JOIN NOW
JOIN NOW

Office Noise Attenuation 
 

Lock dB
Lock dB

Office Noise Isolation Audio 
 

JOIN NOW
JOIN NOW

Street Noise Attenuation 
 

Lock dB
Lock dB

Street Noise Isolation Audio 
 

JOIN NOW
JOIN NOW

Noise Isolation - Voice Handling 
 

Female Voice 1 
 

JOIN NOW
JOIN NOW

Male Voice 1 
 

JOIN NOW
JOIN NOW

Female Voice 2 
 

JOIN NOW
JOIN NOW

Male Voice 2 
 

JOIN NOW
JOIN NOW

ANC Wind Handling 
 

ANC Wind Handling Graph  

Anker Soundcore Space A40 Truly Wireless ANC Wind Handling Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 ANC Wind Handling Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

ANC Wind Noise 
 

JOIN NOW
JOIN NOW

Leakage 
 

N/A
N/A

Leakage  

Anker Soundcore Space A40 Truly Wireless Leakage Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Leakage Sample

SAMPLE

JOIN NOW

for pictures & test results

Leakage Audio 
 

JOIN NOW
JOIN NOW

Overall Leakage @ 1ft 
 

Lock dB
Lock dB
Microphone

Microphone Style 
 

Integrated 
 

Locked
Locked

In-Line 
 

Locked
Locked

Boom 
 

Locked
Locked

Detachable Boom 
 

Locked
Locked

Mic  

Locked
Locked

Recording Quality 
 

N/A
N/A

Microphone Frequency Response  

Anker Soundcore Space A40 Truly Wireless Microphone Frequency Response Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Microphone Frequency Response Sample

SAMPLE

JOIN NOW

for pictures & test results

Recorded Speech 
 

JOIN NOW
JOIN NOW

LFE 
 

Lock Hz
Lock Hz

FR Std. Dev. 
 

Lock dB
Lock dB

HFE 
 

Lock Hz
Lock Hz

Weighted THD 
 

Lock
N/A

Gain 
 

Lock dB
Lock dB

Noise Handling 
 

N/A
N/A

SpNR  

Anker Soundcore Space A40 Truly Wireless SpNR Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 SpNR Sample

SAMPLE

JOIN NOW

for pictures & test results

SpNR 
 

Lock dB
Lock dB

Noise Gate 
 

Locked
Locked

Speech + Pink Noise Handling 
 

0.0
0.0

Speech + Pink Noise Audio Sample  

JOIN NOW
JOIN NOW

Speech + Subway Noise Handling 
 

0.0
0.0

Speech + Subway Noise Audio Sample  

JOIN NOW
JOIN NOW
Active Features

Battery 
 

N/A
N/A

Battery Type 
 

Locked
Locked

Continuous Battery Life 
 

Lock hrs
Lock hrs

Additional Charges 
 

Lock
Lock

Total Battery Life 
 

Lock hrs
Lock hrs

Charge Time 
 

Lock hrs
Lock hrs

Power-Saving Feature 
 

Locked
Locked

Audio While Charging 
 

Locked
Locked

Passive Playback 
 

Locked
Locked

Charging Port  

Locked
Locked

App Support 
 

N/A
N/A

App Picture  

Anker Soundcore Space A40 Truly Wireless App Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 App Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

App Name  

Locked
Locked

iOS  

Locked
Locked

Android  

Locked
Locked

macOS  

Locked
Locked

Windows  

Locked
Locked

Equalizer 
 

Locked
Locked

ANC Control 
 

Locked
Locked

Mic Control  

Locked
Locked

Room Effects 
 

Locked
Locked

Playback Control 
 

Locked
Locked

Button Mapping  

Locked
Locked

Surround Support 
 

Locked
Locked
Connectivity

Wired Connection 
 

N/A
N/A

Cable Picture  

Anker Soundcore Space A40 Truly Wireless Cable Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

OnePlus Buds 4 Cable Picture Sample

SAMPLE

JOIN NOW

for pictures & test results

Analog Audio 
 

Locked
Locked

USB Audio 
 

Locked
Locked

Detachable 
 

Locked
Locked

Length 
 

N/A
N/A

Connector 
 

Locked
Locked

Latency - Analog 
 

N/A
N/A

Latency - USB 
 

N/A
N/A

Recorded Latency 
 

JOIN NOW
JOIN NOW

Recorded Latency Connection  

Locked
Locked

Bluetooth Connection 
 

N/A
N/A

Bluetooth Version 
 

Locked
Locked

Multi-Device Pairing 
 

Locked
Locked

Quick Pair (Android) 
 

Locked
Locked

Quick Pair (iOS) 
 

Locked
Locked

Line Of Sight Range 
 

Lock ft (Lock m)
Lock ft (Lock m)

Latency - SBC 
 

Lock ms
Lock ms

Latency - aptX 
 

N/A
N/A

Latency - aptX Adaptive (High Quality) 
 

N/A
N/A

Latency - aptX Adaptive (Low Latency) 
 

N/A
N/A

Latency - LDAC 
 

Lock ms
N/A

Recorded Latency 
 

JOIN NOW
JOIN NOW

Recorded Latency Codec  

Locked
Locked

AAC Support 
 

Locked
Locked

Wireless Connection (Dongle) 
 

N/A
N/A

Line Of Sight Range 
 

N/A
N/A

Latency - Dongle 
 

N/A
N/A

Recorded Latency 
 

JOIN NOW
JOIN NOW

PC Compatibility 
 

Analog 
 

Locked
Locked

Wired USB 
 

Locked
Locked

Non-BT Wireless 
 

Locked
Locked

PlayStation Compatibility 
 

PS4 Analog 
 

Locked
Locked

PS4 Wired USB 
 

Locked
Locked

PS4 Non-BT Wireless 
 

Locked
Locked

PS5 Analog 
 

Locked
Locked

PS5 Wired USB 
 

Locked
Locked

PS5 Non-BT Wireless 
 

Locked
Locked

Xbox Compatibility 
 

Xbox One Analog 
 

Locked
Locked

Xbox One Wired USB 
 

Locked
Locked

Xbox One Non-BT Wireless 
 

Locked
Locked

Xbox Series X|S Analog 
 

Locked
Locked

Xbox Series X|S Wired USB 
 

Locked
Locked

Xbox Series X|S Non-BT Wireless 
 

Locked
Locked

Base/Dock 
 

N/A
N/A

Type 
 

Locked
Locked

USB Input 
 

Locked
Locked

Line In 
 

Locked
Locked

Line Out 
 

Locked
Locked

Optical Input 
 

Locked
Locked

RCA Input 
 

Locked
Locked

Dock Charging 
 

Locked
Locked

Power Supply 
 

Locked
Locked

Check Price

Black
Soundcore Space A40
SEE PRICE
Amazon
Storm Gray
Buds 4
SEE PRICE
Amazon
Blue
Soundcore Space A40
SEE PRICE
Amazon
Zen Green
Buds 4
SEE PRICE
BestBuy.com
White
Soundcore Space A40
SEE PRICE
Amazon
 
Back to Top

Anker Soundcore Space A40 Truly Wireless

OnePlus Buds 4

Comments

  1. Comparison
 • Posted 1 month ago

Anker Soundcore Space A40 Truly Wireless vs OnePlus Buds 4: Main Discussion

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