---
product_id: 731886261
title: "Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver"
brand: "koss"
price: "€ 97.82"
currency: EUR
in_stock: true
reviews_count: 10
category: "Koss"
url: https://www.desertcart.fi/products/731886261-koss-x-retrospekt-p-21-retro-on-ear-headphones-retro
store_origin: FI
region: Finland
---

# 30-17,000 Hz frequency range 104 dB sensitivity for rich audio 32 Ω impedance for balanced sound Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver

**Brand:** koss
**Price:** € 97.82
**Availability:** ✅ In Stock

## Summary

> 🎶 Own the retro look, command the modern sound.

## Quick Answers

- **What is this?** Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver by koss
- **How much does it cost?** € 97.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/731886261-koss-x-retrospekt-p-21-retro-on-ear-headphones-retro)

## Best For

- koss enthusiasts

## Why This Product

- Trusted koss brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Open-Back Freedom:** Audible open-back design delivers expansive soundstage for immersive music moments.
- • **Adjust to Your Beat:** Flexible, size-adjustable headband for a perfect fit every time.
- • **Lightweight Durability:** Ultra-light stainless steel frame ensures all-day comfort without compromising strength.
- • **Plug & Play Simplicity:** Wired 3.5mm connection guarantees zero latency and universal compatibility.
- • **Retro Vibes, Modern Sound:** Classic orange foam meets cutting-edge Koss audio tech for a standout listening experience.

## Overview

The Koss x Retrospekt P/21 Retro On-Ear Headphones combine iconic vintage style with advanced audio performance. Featuring a 30-17,000 Hz frequency response, 32 Ω impedance, and 104 dB sensitivity, these wired headphones deliver rich, balanced sound through an open-back design. Built with a lightweight stainless steel adjustable headband and classic orange foam ear pads, they offer both comfort and durability for music lovers craving nostalgia without sacrificing quality.

## Description

The ultimate retro headphones. Manufactured by Koss and sold exclusively by Retrospekt. The classic orange foam combined with a flexible, adjustable metal band provides an unmatched throw buckle look but is more than just aesthetic. Featuring Koss technology, this stereo phone delivers cutting-edge sound reproduction and strength for unparalleled sound richness

Review: シンプルで丈夫です。
Review: 密閉型、カナル型が前提となるノイキャンやワイヤレスもいいですが、気軽にＭＰ３音源を聞くのに本当にそれって必要？排他的な聞き方をしたい時もあるけど、ウォークマンヘッドホンのような開放型で装着負担が少ないヘッドホンで移動中のＢＧＭを楽しみたいと思い、数々安価なものを試しましたが音質が電話のような感じ。安いので仕方ないのかもとあきらめていたところでこれを見つけて試してみました。 ＫＯＳＳといえど中国製ですがそれらとは別物でした。 ただのレトロレプリカではないですよ。 聴けばわかります。（周波数特性：３０～１７,０００Ｈｚ インピーダンス：32Ωの表示があり）

## Features

- Frequency response: 30-17,000 Hz - Impedance: 32 Ω - Sensitivity: 104 dB SPL - 4 feet cord
- Audible open-back design provides an exceptional extensive listening experience
- Sturdy and ultra-lightweight stainless steel design
- Integrated size adjustable headband
- Limited Lifetime Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B092DX27G9 |
| Age Range (Description) | Adult |
| Amazon Bestseller | #35,241 in Electronics ( See Top 100 in Electronics ) #3,633 in Headphones, Earbuds & Accessories |
| Audio Sensitivity | 104 Decibels |
| Batteries Required | No |
| Cable Feature | Detachable |
| Compatible Devices | 3.5mm audio jack or audio device with wireless function |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Control Type | Media Control |
| Customer Package Type | FFP |
| Customer Reviews | 4.5 4.5 out of 5 stars (152) |
| Date First Available | September 3, 2021 |
| Frequency Response | 17000 Hz |
| Headphones Jack | 3.5 mm Jack |
| Included Components | Headband |
| Item Model Number | P/21 |
| Item model number | P/21 |
| Manufacturer | Koss Corporation |
| Material | Metal |
| Model Name | Retro On-Ear Headphones |
| Noise Control | None |
| Number of Items | 1 |
| Package Dimensions | 22.2 x 15.29 x 5.51 cm; 109 g |
| Recommended Uses For Product | Calls, Games, Music |
| Sensitivity | 104 dB |
| Specific Uses For Product | Music |
| Style | Retro |
| Water Resistance Level | Not Water Resistant |
| Wireless Communication Technology | Bluetooth |

## Product Details

- **Brand:** Koss
- **Color:** orange
- **Ear Placement:** On Ear
- **Form Factor:** On Ear
- **Impedance:** 32 Ohms

## Images

![Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver - Image 1](https://m.media-amazon.com/images/I/61oHG7kx8eL.jpg)
![Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver - Image 2](https://m.media-amazon.com/images/I/716Ss8sYruL.jpg)
![Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver - Image 3](https://m.media-amazon.com/images/I/718bun-d07S.jpg)
![Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver - Image 4](https://m.media-amazon.com/images/I/71ApUngkdFL.jpg)
![Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black, Silver - Image 5](https://m.media-amazon.com/images/I/71Z-84VSIkL.jpg)

## Questions & Answers

**Q: Are these essentially the same as the KPH40?**
A: looks like it except for the orange foam cushion.  mine sound clear and bright, great midrange and presence.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by Y***G on November 15, 2025*

シンプルで丈夫です。

### ⭐⭐⭐⭐⭐ Review
*by 小***ク on August 16, 2025*

密閉型、カナル型が前提となるノイキャンやワイヤレスもいいですが、気軽にＭＰ３音源を聞くのに本当にそれって必要？排他的な聞き方をしたい時もあるけど、ウォークマンヘッドホンのような開放型で装着負担が少ないヘッドホンで移動中のＢＧＭを楽しみたいと思い、数々安価なものを試しましたが音質が電話のような感じ。安いので仕方ないのかもとあきらめていたところでこれを見つけて試してみました。 ＫＯＳＳといえど中国製ですがそれらとは別物でした。 ただのレトロレプリカではないですよ。 聴けばわかります。（周波数特性：３０～１７,０００Ｈｚ インピーダンス：32Ωの表示があり）

### ⭐⭐⭐⭐⭐ Review
*by 抹***？ on November 29, 2024*

レトロ満載のカッコ良さ＋軽くて側圧が低く＋音質が良いヘッドホンを探していました。開放型ですので、音漏れはスピーカーの如し、外では無理ですが、もちろん自室ではアリ。

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-01*