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KOSS ED1TC 3.5mm Connector Supra-aural Institutional Headphone

  • 100Hz-20KHz
  • 3.5mm Connector
  • 4 feet Cord Length
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Koss ED1TC Stereophone Ideal for schools, libraries and training departments, this stereophone incorporates a plastic ear cushion that allows easy cleaning and maximum durability in multiple user environments. The ED1TC features an adjustable headband and a dynamic element for a full frequency response. Ultra-durable, the cups and headband have been designed to fit a wide variety of head sizes - from children to adults - for everyday use. Improve cushion hygiene and avoid crumbling foam ear cushions with the Koss ED1TC.

Learn more about the Koss ED1TC


Over the Ear

General SPEC

Frequency Response
Input Impedance
32 ohms
Signal to Noise Ratio(SNR)
98dB SPL
Ear Coupling
Cord Length
4 feet


Plastic ear clip and housing of the element can be cleaned with a soft cloth and alcohol-based cleaning solution

Care should be taken to avoid an excess liquid from entering the speaker element of the product

Highly durable ABS plastic ear cups

Reduces ambient noise interference

Manufacturer Warranty

Lifetime limited
Lifetime limited

Quick Info


  • Limited Warranty period (parts): Lifetime
  • Limited Warranty period (labor): Lifetime

Customer Reviews of the Koss ED1TC

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  • Barry M.
  • 10/10/2012 1:03:28 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsBest headphones for school

Pros: Much more durable than other cheap headphones (it has one larger wire rather than two tiny wires) and the lack of foam padding makes them ideal for places that have a concern about head lice.

Cons: Not very comfortable (but if they're too nice someone will steal them)

Other Thoughts: We've tried a dozen other brands and models of headphones, these are the only ones that hold up (and we have over 300 pairs)

Did you find this review helpful? Yes No

  • Joseph C.
  • 7/23/2012 9:25:44 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

2 out of 5 eggsDecent sound but painful

Pros: Decent sound for the price. Hygienic I guess.

Cons: No cushioning at all. Hard plastic only. Painful and sweaty.

Other Thoughts: Now I know why they call them institutional. I would not have to wear these for longer than 10 minutes.

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