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Koss PRO4S + Sonic Electronix Bonus Pack 3

Wired Full Size Over-Ear Studio Headphones w/ Detachable Cable + Extended Warranty & Exchange Policy + 15% off Headphone Amp/DAC Coupon

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• Wired Over Ear Studio Headphones
• Detachable Cord with Dual Choise Entry
• Memory Foam Ear Cushions
• Sensitivity: 99dB
• Color: Black
• Extended 180 Day Exchange Policy
• 3-year Sonic Electronix Warranty
• 15% off Coupon for the Headphone Amplifer/DAC of Your Choice

Learn more about the pro4s_hp-3yearwarranty-200_180-day-exchange

We apologize

This item has been discontinued

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Product Highlights


• Wired Over Ear Studio Headphones
• Detachable Cord with Dual Choise Entry
• Memory Foam Ear Cushions
• Sensitivity: 99dB
• Color: Black
• Extended 180 Day Exchange Policy
• 3-year Sonic Electronix Warranty
• 15% off Coupon for the Headphone Amplifer/DAC of Your Choice

Description


Koss brand icon

Authorized dealer

Sonic Electronix Bonus Pack 3

Each Sonic Electronix Bonus Pack 3 is intended to help you get the most from your new headphones. The package for the Koss PRO4S Headphones gives you additional peace of mind thanks to the 3-year Sonic Electronix extended warranty. We're also giving you an extended 180 day exchange policy just in case you don't absolutely love this player. To top it off, you can use the exclusive 15% off coupon on a select headphone amplifier/DAC or headphone accessory of your choice!



Koss PRO4S

Wired Full Size Over-Ear Studio Headphones w/ Detachable Cable
Quantity: 1

General Features:

  • Wired Over-Ear Studio Headphones
  • Tuned for studio reference
  • D-profile with memory foam cushions
  • Detachable cable with dual choice entry
  • Adjustable headband for comfortable listening sessions
  • Primary Color: Black
  • Accent Colors: Silver
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Frequency Response: 10-25,000 Hz
  • Sensitivity: 99dB
  • Nominal Impedance: 35 Ohm
  • Cable:
    • Detachable: Yes
    • Cord Length: 4.5 ft. (1.4m)
  • Plug Size: 3.5mm
  • Includes 1/4" adapter

Also found as: 184474

Sonic Electronix Bonus Pack 3 Includes:

3-year Sonic Electronix Warranty on the Koss PRO4S Headphones
  • Coverage begins on date of purchase
  • No hassle warranty that comes with all the bells and whistles and no hidden gotchas
  • Comes fully equipped with a 5-day service guarantee, 24/7 Online access to your warranty contract
  • Protection from ALL mechanical and electrical failures

Note: International Customers are responsible for all shipping, duties and taxes

15% off Coupon for the Headphone Amplifier, DAC or Accessory of Your Choice
Extended 180 Day Exchange for the Koss PRO4S Headphones
  • If you don't love your new high resolution music player, exchange them within 180 days no questions asked!
    • Only applies to the Koss PRO4S Headphones
    • Must be returned without physical damage in original packaging with all accessories
      • Defective products still eligible for standard 1 year exchange policy
    • Standard 60 day return policy still applies
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Specifications & Details


Audio Features
Driver Type
Dynamic
Impedance
35 ohm
Sensitivity
99 dB
Frequency Response
10 - 25,000 Hz
Audiophile
No
Built-in Amplifier
No
Amplifier Recommended
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

PRO4S_HP-3YEARWARRANTY-200_180 Day Exchange

Weight:

2.02lbs

Internal SKU:

pro4s_hp-3yearwarranty-200_180-day-exchange

Internal Product ID:

98513

Product and How-to Videos


  • Differences Between Headphone Acoustic Principles | Open, Closed, & Semi-Open
  • Headphones Based on Musical Preference | What Type of Listener Are You?

Customer Ratings & Reviews


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.