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how to test used headphones before buying

Ask By Yousef S.656 views

buying used headphones from a seller tomorrow. what should I test in person

Brand
Sennheiser
Model
HD 650
Connection
Wired 3.5mm Jack
Sample Rate
48 kHz
Output Channels
2 channels
Buying And Warranty HelpHeadphones
Tool used in this discussionLeft Right TestPlay one side at a time to catch a swapped or dead channel
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Short Answer

Bring your phone and use the Left Right Test, check cable wiggle and ear pad condition, and ask for the serial number.

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Alistair Cross
Alistair CrossAudio Team
Headphone Benchmark Lead · 5+ years experience · Answered Sep 13, 2026

Check both channels, crackle on wiggle and the state of pads.

After you make the change, play the Left Right Test again to confirm the result. If the problem is still there, add your device, browser and what you tried in the replies so the team can narrow it down.

Step By Step Fix
  1. Play the Left Right Test
  2. Wiggle the cable while playing
  3. Inspect pads and headband
  4. Ask for proof of purchase
Sources
  1. Consumer Rights: Returns And Refunds (FTC)

Checked by Kriti Desai on . How we verify answers

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Community Replies 3

  • Charlotte MarshallCommunity Member

    Found a dead side before paying and saved money. Worth trying before you spend any money.

  • Jenna KennedyCommunity Member

    Bring your own cable. It took me a few minutes, and the Left Right Test showed the difference straight away.

  • Shane SnyderCommunity Member

    I now run the Left Right Test the day I unbox any headphones, so problems are caught early.

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Tools Mentioned In The Answer

Sound TestsHeadphone TestLeft and right channel, balance and driver check
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Alistair Cross
Written and tested by

Alistair Cross

Headphone Benchmark Lead at Sound Test

Alistair Cross is the Headphone Benchmark Lead on the Sound Tester Audio Team. Expert in transient response tracking, left/right separation, and driver matching for studio monitors. Shares high-end headphone benchmarks and hardware metrics on LinkedIn. On Sound Tester he answers discussions about weak or uneven headphones, mismatched drivers and buying questions, and checks fixes with the Headphone Test and Left Right Test.

Headphone benchmarksdriver matchingchannel separation
  • 9 answers on Sound Test
  • 5+ years experience
  • Reviewed by Kriti Desai
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The Audio Team Behind These Answers

All 38 specialists
Brandon VanceBrandon VanceAudio & Acoustic Performance LeadXavier CruzXavier CruzFrequency Sweep SpecialistDiana ChenDiana ChenHearing Test ArchitectImogen BlakeImogen BlakeBinaural Beats EngineerCallum SterlingCallum SterlingSurround Sound AuditorGemma GallagherGemma GallagherTone Generator ValidatorHarvey FinchHarvey FinchSpectrum Analyzer LeadRishabh SharmaRishabh SharmaAudio DSP Engineer

Each answer is written by the specialist closest to the topic and checked by a second team member. How we verify answers

Answers are free general guidance from the Sound Tester Audio Team and community. They are not medical advice. For hearing loss, ringing or ear pain, see a doctor or audiologist. Opening a device can void its warranty, so check the maker's support first for hardware faults.

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