Sennheiser HD 650 vs HiFiMan Sundara 2020

Which Headphones Are Better?

Products

Sennheiser HD 650
HiFiMan Sundara 2020

Tested using Methodology v1.5

Updated Jul 18, 2025 05:51 PM

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Tested using Methodology v2.1

Updated Mar 09, 2026 11:37 AM

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Our Verdict

Sennheiser HD 650

HiFiMan Sundara 2020

The HiFiMan Sundara 2020 are slightly better for audio reproduction accuracy than the Sennheiser HD 650, though it depends on your tastes. The HiFiMan are more comfortable and can produce a bit more low bass. However, the Sennheiser have a more stable fit and don't trap as much heat against your ears.

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Variants

  • HD 650 (Gray)
  • Sundara 2020 (Black)

Check Price

Gray
HD 650
SEE PRICE
Amazon.com
Black
Sundara 2020
Amazon.com
Gray
HD 650
SEE PRICE
Walmart.com
Black
Sundara 2020
B&H
Gray
HD 650
SEE PRICE
B&H
Black
Sundara 2020
BestBuy.com
Gray
HD 650
BestBuy.com
Black
Sundara 2020
HiFiMan
Gray
HD 650
Sennheiser
Black
Sundara 2020
Walmart.com
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Main Differences for
Neutral Sound

Threshold 

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Neutral Sound 
 

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Full Comparison

Sound

Sound Profile 
 

Sound Profile  

Sennheiser HD 650 Sound Profile Sample

SAMPLE

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HiFiMan Sundara 2020 Sound Profile Sample

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Normalization Frequency 
 

Lock Hz

Bass Amount 
 

Locked

Bass Amount 
 

Lock dB

Treble Amount 
 

Lock dB

Treble Amount 
 

Locked

Sound Signature 
 

Locked
Show Text 

Frequency Response Consistency 
 

N/A
N/A

Consistency L  

Sennheiser HD 650 Consistency L Sample

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HiFiMan Sundara 2020 Consistency L Sample

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Consistency R  

Sennheiser HD 650 Consistency R Sample

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HiFiMan Sundara 2020 Consistency R Sample

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Std. Deviation 
 

Lock dB
Lock dB
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Raw Frequency Response 
 

Raw FR L  

Sennheiser HD 650 Raw FR L Sample

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HiFiMan Sundara 2020 Raw FR L Sample

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Raw FR R  

Sennheiser HD 650 Raw FR R Sample

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HiFiMan Sundara 2020 Raw FR R Sample

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Bass Profile: Target Compliance 
 

N/A
N/A

Bass Profile: Target Compliance  

Sennheiser HD 650 Bass Profile: Target Compliance Sample

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HiFiMan Sundara 2020 Bass Profile: Target Compliance Sample

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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
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Mid-Range Profile: Target Compliance 
 

N/A
N/A

Mid-Range Profile: Target Compliance  

Sennheiser HD 650 Mid-Range Profile: Target Compliance Sample

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HiFiMan Sundara 2020 Mid-Range Profile: Target Compliance Sample

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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
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Treble Profile: Target Compliance 
 

N/A
N/A

Treble Profile: Target Compliance  

Sennheiser HD 650 Treble Profile: Target Compliance Sample

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HiFiMan Sundara 2020 Treble Profile: Target Compliance Sample

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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
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Peaks/Dips 
 

N/A
N/A

Peaks/Dips Graph 
 

Sennheiser HD 650 Peaks/Dips Graph Sample

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HiFiMan Sundara 2020 Peaks/Dips Graph Sample

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Peaks 
 

Lock dB
Lock dB

Dips 
 

Lock dB
Lock dB
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Stereo Mismatch 
 

N/A
N/A

Frequency Response Mismatch  

Sennheiser HD 650 Frequency Response Mismatch Sample

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HiFiMan Sundara 2020 Frequency Response Mismatch Sample

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Phase Response Mismatch  

Sennheiser HD 650 Phase Response Mismatch Sample

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HiFiMan Sundara 2020 Phase Response Mismatch Sample

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Weighted Amplitude Mismatch 
 

Lock
Lock dB

Weighted Frequency Response Mismatch 
 

Lock
Lock dB

Weighted Phase Mismatch 
 

Lock
Lock°
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Cumulative Spectral Decay 
 

CSD  

Sennheiser HD 650 CSD Sample

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HiFiMan Sundara 2020 CSD Sample

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PRTF 
 

N/A
N/A

PRTF  

Sennheiser HD 650 PRTF Sample

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HiFiMan Sundara 2020 PRTF Sample

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PRTF Accuracy (RMS Deviation) 
 

Lock dB
Lock dB

PRTF Size (Avg.) 
 

Lock dB
Lock dB

PRTF Distance 
 

Lock dB
Lock dB

Openness 
 

0.0

Acoustic Space Excitation 
 

0.0
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Harmonic Distortion 
 

N/A
N/A

Harmonics Levels  

Sennheiser HD 650 Harmonics Levels Sample

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HiFiMan Sundara 2020 Harmonics Levels Sample

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THD Ratio  

Sennheiser HD 650 THD Ratio Sample

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HiFiMan Sundara 2020 THD Ratio Sample

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WHD @ 94 dB SPL 
 

Lock
Lock%

WHD @ 104 dB SPL 
 

Lock
Lock%

Electrical Aspects 
 

Impedance  

Sennheiser HD 650 Impedance Sample

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HiFiMan Sundara 2020 Impedance Sample

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Sensitivity @1kHz-1V 
 

Lock dB SPL

Bluetooth Max SPL 
 

N/A
Show Text 

Virtual Soundstage 
 

N/A
N/A

Virtual Soundstage  

Sennheiser HD 650 Virtual Soundstage Sample

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HiFiMan Sundara 2020 Virtual Soundstage Sample

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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

EQ 
 

Locked
Locked

ANC 
 

Locked
Locked

Tip/Pad 
 

Locked
Locked

Microphone 
 

Locked
Locked
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Imaging 
 

N/A
N/A

Group Delay  

Sennheiser HD 650 Group Delay Sample

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HiFiMan Sundara 2020 Group Delay Sample

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Phase Response Mismatch  

Sennheiser HD 650 Phase Response Mismatch Sample

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HiFiMan Sundara 2020 Phase Response Mismatch Sample

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Weighted Group Delay 
 

Lock

Weighted Phase Mismatch 
 

Lock
Lock°

Weighted Amplitude Mismatch 
 

Lock
Lock dB

Weighted Frequency Mismatch 
 

Lock
Lock dB
Show Text 

Weighted Harmonic Distortion 
 

N/A
N/A

Weighted Harmonic Distortion  

Sennheiser HD 650 Weighted Harmonic Distortion Sample

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HiFiMan Sundara 2020 Weighted Harmonic Distortion Sample

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WHD @ 90 
 

Lock
Lock%

WHD @ 100 
 

Lock
Lock%
Design

Style  

Design Picture 2  

Sennheiser HD 650 Design Picture 2 Sample

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HiFiMan Sundara 2020 Design Picture 2 Sample

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Type  

Locked
Locked

Enclosure  

Locked
Locked

Wireless  

Locked
Locked

Transducer  

Locked
Locked
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Comfort 
 

N/A
N/A

Comfort Picture  

Sennheiser HD 650 Comfort Picture Sample

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HiFiMan Sundara 2020 Comfort Picture Sample

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Weight  

Lock lbs
Lock lbs

Clamping Force 
 

Lock lbs
Lock lbs
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Controls 
 

N/A
N/A

Controls Picture  

Sennheiser HD 650 Controls Picture Sample

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HiFiMan Sundara 2020 Controls Picture Sample

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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
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Breathability 
 

N/A
N/A

Breathability After Picture  

Sennheiser HD 650 Breathability After Picture Sample

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HiFiMan Sundara 2020 Breathability After Picture Sample

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Avg.Temp.Difference  

Lock °C
Show Text 

Portability 
 

N/A
N/A

Portability Picture  

Sennheiser HD 650 Portability Picture Sample

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HiFiMan Sundara 2020 Portability Picture Sample

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

 

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

 

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

Volume  

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

Transmitter Required  

Locked
Locked
Show Text 

Case 
 

N/A
N/A

Case Picture  

Sennheiser HD 650 Case Picture Sample

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HiFiMan Sundara 2020 Case Picture Sample

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Type  

Locked
Locked

 

N/A
N/A

 

N/A
N/A

 

N/A
N/A

Volume  

N/A
N/A
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Build Quality 
 

N/A
N/A

Build Quality Picture  

Sennheiser HD 650 Build Quality Picture Sample

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HiFiMan Sundara 2020 Build Quality Picture Sample

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Stability 
 

N/A
N/A

Stability Picture  

Sennheiser HD 650 Stability Picture Sample

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HiFiMan Sundara 2020 Stability Picture Sample

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Show Text 

Headshots 1  

Angled Picture  

Sennheiser HD 650 Angled Picture Sample

SAMPLE

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HiFiMan Sundara 2020 Angled Picture Sample

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Side Picture  

Sennheiser HD 650 Side Picture Sample

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HiFiMan Sundara 2020 Side Picture Sample

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Headshots 2  

Front Picture  

Sennheiser HD 650 Front Picture Sample

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HiFiMan Sundara 2020 Front Picture Sample

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Rear Picture  

Sennheiser HD 650 Rear Picture Sample

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HiFiMan Sundara 2020 Rear Picture Sample

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Top  

Top Picture  

Sennheiser HD 650 Top Picture Sample

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HiFiMan Sundara 2020 Top Picture Sample

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In The Box  

In The Box Picture  

Sennheiser HD 650 In The Box Picture Sample

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HiFiMan Sundara 2020 In The Box Picture Sample

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Show Text 
Isolation

Noise Isolation - Full Range 
 

N/A
N/A

Noise Isolation - Full Range Graph  

Sennheiser HD 650 Noise Isolation - Full Range Graph Sample

SAMPLE

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HiFiMan Sundara 2020 Noise Isolation - Full Range Graph Sample

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Noise Cancelling  

Locked
Locked

Overall Attenuation 
 

Lock dB
Lock dB

Isolation Audio 
 

Bass 
 

Lock dB
Lock dB

Mid 
 

Lock dB
Lock dB

Treble 
 

Lock dB
Lock dB
Show Text 

Noise Isolation - Common Scenarios 
 

N/A
N/A

Noise Isolation - Common Scenarios Graph  

Sennheiser HD 650 Noise Isolation - Common Scenarios Graph Sample

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HiFiMan Sundara 2020 Noise Isolation - Common Scenarios Graph Sample

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Airplane Noise Attenuation 
 

Lock dB

Airplane Noise Isolation Audio 
 

Office Noise Attenuation 
 

Lock dB

Office Noise Isolation Audio 
 

Street Noise Attenuation 
 

Lock dB

Street Noise Isolation Audio 
 

Show Text 

Noise Isolation - Voice Handling 
 

Female Voice 1 
 

Male Voice 1 
 

Female Voice 2 
 

Male Voice 2 
 

ANC Wind Handling 
 

ANC Wind Handling Graph  

Sennheiser HD 650 ANC Wind Handling Graph Sample

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HiFiMan Sundara 2020 ANC Wind Handling Graph Sample

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ANC Wind Noise 
 

Leakage 
 

N/A
N/A

Leakage  

Sennheiser HD 650 Leakage Sample

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HiFiMan Sundara 2020 Leakage Sample

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Leakage Audio 
 

Overall Leakage @ 1ft 
 

Lock dB
Lock dB
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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  

Sennheiser HD 650 Microphone Frequency Response Sample

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HiFiMan Sundara 2020 Microphone Frequency Response Sample

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Recorded Speech 
 

LFE 
 

N/A
N/A

FR Std. Dev. 
 

N/A
N/A

HFE 
 

N/A
N/A

Weighted THD 
 

N/A
N/A

Gain 
 

N/A
N/A
Show Text 

Noise Handling 
 

N/A
N/A

SpNR  

Sennheiser HD 650 SpNR Sample

SAMPLE

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HiFiMan Sundara 2020 SpNR Sample

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SpNR 
 

N/A
N/A

Noise Gate 
 

Locked
Locked

Speech + Pink Noise Handling 
 

N/A
N/A

Speech + Pink Noise Audio Sample  

Speech + Subway Noise Handling 
 

N/A
N/A

Speech + Subway Noise Audio Sample  

Show Text 
Active Features

Battery 
 

N/A
N/A

Battery Type 
 

Locked
Locked

Continuous Battery Life 
 

N/A
N/A

Additional Charges 
 

N/A
N/A

Total Battery Life 
 

N/A
N/A

Charge Time 
 

N/A
N/A

Power-Saving Feature 
 

Locked
Locked

Audio While Charging 
 

Locked
Locked

Passive Playback 
 

Locked
Locked

Charging Port  

Locked
Locked
Show Text 

App Support 
 

N/A
N/A

App Picture  

Sennheiser HD 650 App Picture Sample

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HiFiMan Sundara 2020 App Picture Sample

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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
Show Text 
Connectivity

Wired Connection 
 

N/A
N/A

Cable Picture  

Sennheiser HD 650 Cable Picture Sample

SAMPLE

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HiFiMan Sundara 2020 Cable Picture Sample

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Analog Audio 
 

Locked
Locked

USB Audio 
 

Locked
Locked

Detachable 
 

Locked
Locked

Length 
 

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

Connector 
 

Locked
Locked

Latency - Analog 
 

Lock ms

Latency - USB 
 

Lock ms
N/A

Recorded Latency 
 

Recorded Latency Connection  

Locked
Show Text 

Bluetooth Connection 
 

N/A
N/A

Bluetooth Version 
 

Locked
Locked

Multi-Device Pairing 
 

Locked
Locked

NFC Pairing 
 

Locked

Quick Pair (Android) 
 

Locked

Quick Pair (iOS) 
 

Locked

Line Of Sight Range 
 

N/A
N/A

Latency - SBC 
 

N/A
N/A

Latency - aptX 
 

N/A
N/A

Latency - aptX Adaptive (High Quality) 
 

N/A

Latency - aptX Adaptive (Low Latency) 
 

N/A

Latency - LDAC 
 

N/A

Recorded Latency 
 

Recorded Latency Codec  

Locked

AAC Support 
 

Locked

PC Latency (aptX HD) 
 

N/A

PC Latency (aptX-LL) 
 

N/A

iOS Latency 
 

N/A

Android Latency 
 

N/A
Show Text 

Wireless Connection (Dongle) 
 

N/A
N/A

Line Of Sight Range 
 

N/A
N/A

Latency - Dongle 
 

N/A
N/A

Recorded Latency 
 

PC Compatibility 
 

Analog 
 

Locked
Locked

Wired USB 
 

Locked
Locked

Non-BT Wireless 
 

Locked
Locked
Show Text 

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
Show Text 

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
Show Text 

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
Show Text 

Check Price

Gray
HD 650
SEE PRICE
Amazon.com
Black
Sundara 2020
Amazon.com
Gray
HD 650
SEE PRICE
Walmart.com
Black
Sundara 2020
B&H
Gray
HD 650
SEE PRICE
B&H
Black
Sundara 2020
BestBuy.com
Gray
HD 650
BestBuy.com
Black
Sundara 2020
HiFiMan
Gray
HD 650
Sennheiser
Black
Sundara 2020
Walmart.com

Sennheiser HD 650

HiFiMan Sundara 2020

Comments

  1. Comparison

Sennheiser HD 650 vs HiFiMan Sundara 2020: Main Discussion

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