Headphones
Products
In The Lab
Forums
Newsletters
 Insider access
Notice: Your browser is not supported or outdated so some features of the site might not be available.
Best
Noise Cancelling Headphones Wireless Earbuds Noise Cancelling Earbuds Gaming Over-Ear Wireless Wireless Gaming Running PC Gaming Xbox One PS5/PS5 Pro Wireless Earbuds For Running Beats Wired Music Over-Ears For Working Out On-Ear In-Ears Budget And Cheap
Tools
Compare Table Review List Review Index Graph Custom Ratings
Popular
Bose QuietComfort Ultra Headphones Wireless Jabra Elite 8 Active Gen 2 Audeze Maxwell Wireless Logitech G PRO X 2 LIGHTSPEED Wireless Sony WH-1000XM5 Wireless Sony WH-1000XM4 Wireless Samsung Galaxy Buds3 Pro Astro A50 X Sony WF-1000XM5 Truly Wireless Sennheiser MOMENTUM 4 Wireless SteelSeries Arctis Nova 7 Wireless [7, 7P, 7X] Apple AirPods Pro (2nd generation) Anker Soundcore Space Q45 Wireless Samsung Galaxy Buds FE Sennheiser HD 800 S Anker Soundcore Space A40 Truly Wireless SteelSeries Arctis Nova Pro Wireless [PC, PS, Xbox] Sony WH-CH720N Wireless Beyerdynamic DT 770 PRO Anker Soundcore Life Q30 Wireless
829
Headphones bought and tested
Supported by you via insider access, and when you purchase through links on our site, we may earn an affiliate commission.
Driven by data, run by a passionate team of engineers, testers, technical writers, developers, and more.
We are hiring!
  1. Home
  2. Headphones
  3. Compare
Notice: We're proud to introduce Test Bench 2.0, which overhauls our audio measurements, with new tests and usages. There's even a brand new multi-target graphing tool! You can read all about this in our changelog, featuring commentary from our Test Designer, Pierre.
  1. Table of Contents
  2. Top
  3. Main Differences
  4. Sound
    1. Sound Profile
    2. Frequency Response Consistency
    3. Raw Frequency Response
    4. Bass Profile: Target Compliance
    5. Mid-Range Profile: Target Compliance
    6. Treble Profile: Target Compliance
    7. Peaks/Dips
    8. Stereo Mismatch
    9. Group Delay
    10. Cumulative Spectral Decay
    11. PRTF
    12. Harmonic Distortion
    13. Electrical Aspects
    14. Virtual Soundstage
    15. Test Settings
    16. Imaging
    17. Weighted Harmonic Distortion
  5. Design
    1. Style
    2. Comfort
    3. Controls
    4. Breathability
    5. Portability
    6. Case
    7. Build Quality
    8. Stability
    9. Headshots 1
    10. Headshots 2
    11. Top
    12. In The Box
  6. Isolation
    1. Noise Isolation - Full Range
    2. Noise Isolation - Common Scenarios
    3. Noise Isolation - Voice Handling
    4. ANC Wind Handling
    5. Leakage
  7. Microphone
    1. Microphone Style
    2. Recording Quality
    3. Noise Handling
  8. Active Features
    1. Battery
    2. App Support
  9. Connectivity
    1. Wired Connection
    2. Bluetooth Connection
    3. Wireless Connection (Dongle)
    4. PC Compatibility
    5. PlayStation Compatibility
    6. Xbox Compatibility
    7. Base/Dock
  10. Comments

Superlux HD 668B vs Beyerdynamic DT 990 PRO

Side-by-Side Comparison

Products

Superlux HD 668B
Beyerdynamic DT 990 PRO

Tested using Methodology v1.5

Updated Apr 26, 2022 08:51 PM

SEE PRICE
Amazon.com

Tested using Methodology v2.0

Updated Apr 28, 2025 01:12 PM

SEE PRICE
Amazon.com
Superlux HD 668B Picture
Beyerdynamic DT 990 PRO Picture
TypeOver-ear
Noise CancellingNo
EnclosureSemi-Open
WirelessNo
TransducerDynamic
MicNo
TypeOver-Ear
Noise CancellingNo
EnclosureOpen-Back
Bass Amount
Slightly Underemphasized (-1 dB)
WirelessNo
TransducerDynamic
Treble Amount
Balanced (0 dB)
MicNo
Sound Signature
Bright

Variants

  • HD 668B
  • DT 990 PRO (Black)
  • DT 990 PRO (Grey)

Review

See Superlux HD 668B Review
See Beyerdynamic DT 990 PRO Review
0 
0 

Our Verdict

Superlux HD 668B

Beyerdynamic DT 990 PRO

Full comparison details regarding individual product score sets can be found in the section below
We make money directly from you via insider access (which gives you access to extra features) and when you buy a product after clicking a link to a retailer. Learn more about how we work.
We buy our own products, just like you, mostly from the United States. When a product is discontinued or no longer popular, we sell the review units locally. You can see what products we currently have for sale here.
© 2025 9298-5266 Quebec Inc. All Rights Reserved. Visit our corporate site.