Koss x Retrospekt P21 Headphones: Vintage Style Meets Modern Sound

Published on Dec. 19, 2023, 6:21 p.m.

The Koss x Retrospekt P21 is a stylish pair of wired on-ear headphones with a retro design aesthetic. Offering great sound in a lightweight and comfortable package, these Koss cans are perfect for music lovers looking for some old-school flair.


  • Origin & Brand: Made by Koss in the USA
  • Model & Release: P21 model launched in 2023
  • Colors: Orange, black, and silver color scheme
  • Connectivity: Wired 3.5mm headphone jack
  • Audio: Frequency response 30-17,000 Hz, 32 ohms impedance, 104 dB sensitivity

 Koss x Retrospekt P21 Retro On-Ear Headphones

Product Name and Features

The Koss x Retrospekt P21 Retro On-Ear Headphones feature a retro design with excellent sound performance. Key features include the orange foam earpads, adjustable stainless steel headband, open-back design, and wired connectivity.

Here is more detail about the Koss x Retrospekt P21 headphones covering features, design, selling points, ease of use, sound quality, microphone, noise isolation, storage, FM radio, battery life, connectivity, controls, build quality, comfort, water resistance, and value:

Features and Design

The Koss x Retrospekt P21 Retro On-Ear Headphones stand out with their:

  • Retro design featuring orange foam earpads and an adjustable stainless steel headband for a cool throwback look
  • Open-back architecture that creates an expanded and immersive soundstage
  • Lightweight build for comfortable long-term wearing
     Koss x Retrospekt P21 Retro On-Ear Headphones

Unique Selling Points

These headphones provide:

  • A seamless blend of vintage aesthetics and modern audio performance
  • The authentic Koss sound in a stylish and affordable package
  • A comfortable retro alternative to bulky over-ear headphones

Ease of Use

The Koss x Retrospekt P21 Retro On-Ear Headphones offer straightforward operation thanks to their:

  • Single wired connection that plugs easily into any 3.5mm audio jack
  • Integrated volume and track controls on the cable for convenient access
  • Adjustable steel headband to dial in the perfect fit

Sound Quality

  • Delivers impressive sound for the price point with clear mids and nice low end
  • The open-back design creates an expanded, spatial listening experience
  • Specific audio components are unknown, but Koss is known for audio quality

Microphone and Noise Isolation

  • Does not include a microphone
  • The open-back design allows ambient noise in and lacks noise isolation

Battery Life and Connectivity

  • Uses a wired 3.5mm connection without a battery
  • 4 foot cable provides a good length for portable use


  • Includes inline remote on the cable for volume and track control

Build Quality

  • Durable stainless steel headband with foam padding
  • Reinforced connection points between headband and earcups
  • Overall solid construction though specifics are unknown


  • Foam earpads sit comfortably on ears
  • Adjustable steel headband customizes the fit
  • Extremely lightweight for extended wearing

 Koss x Retrospekt P21 Retro On-Ear Headphones


These Koss x Retrospekt P21 Retro On-Ear Headphones are made by Koss, a leading American audio brand founded in 1958 and known for high-quality sound.
 Koss x Retrospekt P21 Retro On-Ear Headphones

Usage Scenarios

The Koss x Retrospekt P21 Retro On-Ear Headphones are perfect for:

  • Enjoying music, podcasts, and more on-the-go with their lightweight and comfortable fit
  • Adding a touch of retro style to your outfit with their vintage aesthetics
  • Relaxing at home while listening to your favorite tunes in an expanded soundstage

User Feedback Analysis

These retro cans have been receiving glowing reviews for their:

  • Nostalgic retro design that takes people back while still feeling fresh
  • Lightweight and comfortable fit allowing for hours of listening without fatigue
  • Impressively open and expansive sound quality given the affordable price

Satisfied users have praised the Koss x Retrospekt P21 Retro On-Ear Headphones for:

  • Their authentic audio heritage look straight out of the 70s or 80s
  • Outstanding comfort thanks to the foam earpads and adjustable steel headband
  • Ability to immerse the listener in their music with the open-back spatial sound

Many reviewers admired how Koss blended retro styling with great sound, saying the Koss x Retrospekt P21 Retro On-Ear Headphones provide amazing audio performance considering their low cost.

Some users pointed out the bass is a bit light. However, most agreed the overall sonic profile is pleasingly balanced and clear.

Owners love rocking the old-school vibe of the orange and silver colorway which pulls off the vintage motif perfectly. The consensus is these punch way above their weight given the sub $30 price.

In summary, feedback indicates the Koss x Retrospekt P21 Retro On-Ear Headphones absolutely nails the retro classic headphone experience both aesthetically and sonically, exceeding expectations for the price. Nostalgic music fans looking for a trip down memory lane have found their match.


  • Great retro aesthetics
  • Impressive sound quality
  • Lightweight and comfortable fit
  • Adjustable steel headband


  • Bass could be slightly amplified for some users
  • Wired connectivity lacks wireless freedom


At just $29, the Koss x Retrospekt P21 Retro On-Ear Headphones provides excellent value by delivering solid sound, cool retro looks, and a comfortable fit at an affordable price point.

 Koss x Retrospekt P21 Retro On-Ear Headphones


The Koss x Retrospekt P21 Retro On-Ear Headphones combines vintage design with great sound quality, perfect for users who love a retro vibe. Its throwback styling and adjustable headband make it stand out aesthetically and in fit. It also delivers impressive audio performance. Overall, these are a solid retro-inspired headphone choice worth recommending.


  • Frequency Response: 30-17,000 Hz
  • Impedance: 32 ohms
  • Sensitivity: 104 dB SPL
  • Cord Length: 4 feet
  • Earcup Design: On-ear, open-back
  • Adjustability: Integrated size-adjustable steel headband
  • Connector: 3.5mm plug
  • Weight: unknown
  • Warranty: Limited lifetime warranty

Box Contents

The box includes:

  • Koss x Retrospekt P21 headphones
  • 4 foot 3.5mm audio cable
  • Warranty information

How to Use

Using the Koss x Retrospekt P21 Retro On-Ear Headphones is simple:

  1. Unpack the headphones and audio cable from the box
  2. Loosen the headband and place the earcups over your ears, then adjust the band for a secure and comfortable fit
  3. Plug the 3.5mm cable into your smartphone, audio player, or other device
  4. Play audio and enjoy the expanded soundstage and retro vibe!