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Specification
Price
Rs.11,250.00
Rs.11,300.00
Brand
Beyerdynamic
Koss
Model No
DT 100
PRO4AA
Wired / Wireless
Wired Headphone Specification
Wired Headphone Specification
Headphone Type
Over Ear
Over Ear
Magnet Type
Neodymium
Dynamic
Driver Diameter
NA
40 mm
Impedance
400 Ohms
250 Ohms
Sensitivity
94 dB/mW
95dB SPL/1mW
Frequency Response
30 Hz to 20000 Hz
10Hz - 25KHz
Maximum Power Input
1000 mW
NA
Noise Cancelling
NA
Sound Isolation
Available Colors
Black
Gold
Connector Plating
3.5 mm Gold Plated Jack
6.35 mm Jack
Cable
3 m
Coiled, Single Entry Cable
Weight
350 g
680 GM
Other Features
- Modular construction for easy servicing
- Excellent ambient noise attenuation
- Rugged construction
- Wide frequency response
- High sensitivity
- High sound pressure capability
1970 : PRO4AA set the standard for full-size professional headphones.
Comfortable Over-Ear Fit : Large, cushioned ear cups surround your ears for a comfortable fit, helping you stay focused on the music through extended listening sessions.
Limited Lifetime Warranty : Every PRO4AA is backed by Koss’ Limited Lifetime Warranty, reflecting our commitment to the headphones we build and the listeners who wear them.
5mm - 6.3mm Compatibility : Connect to a wide range of audio equipment with the included 3.5mm plug and 6.3mm adapter, from portable sources to home stereo components.
Passive Noise Isolation : The PRO4AA over-ear design and cushioned ear cups help block outside distractions, keeping you focused on your music without electronic noise cancellation.
High-Fidelity Audio : Hear your music with an extended 10–25,000 Hz frequency response, delivering deep bass, detailed mids, and crisp high frequencies across a wide range of sound.
Iconic Design : One of the most recognizable headphones around the world, PRO4AA carries forward decades of headphone innovation with a distinctive over-ear design built for serious listening.
Professional 250-Ohm Impedance : Designed for serious listening, The PRO4AA features 250-ohm impedance for use with compatible home audio equipment, amplifiers, and professional audio gear.
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Top Differences

  • Noise Cancelling: NA vs Sound Isolation
  • Driver Size: NA vs 40 mm
  • Weight: 350 g vs 680 GM
  • Impedance: 400 Ohms Vs 250 Ohms
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