---
product_id: 631809385
title: "x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver"
brand: "koss"
price: "¥20473"
currency: JPY
in_stock: true
reviews_count: 5
url: https://www.desertcart.jp/products/631809385-x-retrospekt-p-21-retro-on-ear-headphones-retro-orange
store_origin: JP
region: Japan
---

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

**Brand:** koss
**Price:** ¥20473
**Availability:** ✅ In Stock

## Summary

> 🎶 Retro style, future-ready sound — don’t just listen, experience it!

## Quick Answers

- **What is this?** x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver by koss
- **How much does it cost?** ¥20473 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/631809385-x-retrospekt-p-21-retro-on-ear-headphones-retro-orange)

## 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

- • **Plug & Play Simplicity:** Universal 3.5mm wired connection compatible with all your favorite devices—no Bluetooth fuss, just pure sound.
- • **Comfort That Lasts All Day:** Adjustable stainless steel headband and ultra-lightweight design ensure a perfect fit you’ll forget you’re wearing.
- • **Hear-Through Open-Back Design:** Experience an expansive, immersive soundstage that brings your music to life with rich bass and crisp highs.
- • **Vintage Vibes, Modern Clarity:** Classic retro orange foam meets Koss’s cutting-edge sound tech for a nostalgic yet crystal-clear listening experience.
- • **Built to Endure, Backed for Life:** Durable metal construction paired with a limited lifetime warranty means these headphones are your long-term audio companion.

## Overview

The x Retrospekt P/21 Retro On-Ear Headphones combine iconic 70s-inspired design with advanced Koss audio technology, delivering a frequency response of 30-17,000 Hz, 32 Ohms impedance, and 104 dB sensitivity. Featuring an adjustable stainless steel headband, a hear-through open-back design, and a universal 3.5mm wired connection, these lightweight headphones offer both comfort and immersive sound quality, backed by a limited lifetime warranty.

## Description

The ultimate retro headphones, made by Koss and available exclusively from Retrospekt. They combine classic orange foam and a flexible and adjustable metal band to provide an unmatched throwback look, but are so much more than just aesthetics. Powered by Koss technology, these stereophones offer state-of-the-art sound reproduction and intensity for unmatched sonic richness.

Review: Replacing my comparable old Sony headphones. - These are really impressive for the price and design. I have a pair of old Sony MDR-005 that I wear when casually listening to my Walkman DAP around the house. These headphones sound much better. They have great range and are very clear. The bass is very full and strong while not being overwhelming. My Sony headphones are getting up in age so these will be the replacement and I am more than happy with that. I am a guy with a pretty big head and these fit comfortably, I forget I am wearing them. If you been considering these for the form and function I say go for it!
Review: Good quality for the price. - Already bought one-pair ... for the price .. pretty good quality.

## Features

- Frequency Response: 30-17,000 Hz - Impedance: 32 Ohms - Sensitivity: 104 dB SPL - 4 foot Cord
- Hear-through open-back design that delivers an exceptional, expansive listening experience
- Durable, ultra lightweight stainless steel design
- Integrated size-adjustable headband
- Limited Lifetime Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B092DX27G9 |
| Age Range Description | Adult |
| Antenna Location | Calling, Gaming, Music |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #549,963 in Electronics ( See Top 100 in Electronics ) #347 in On-Ear Headphones |
| Box Contents | Cable, Ear Cushions, Headband |
| Brand | Koss |
| Brand Name | Koss |
| Cable Features | Retractable |
| Carrying Case Material | Stainless steel |
| Colour | Orange |
| Compatible Devices | Any audio device with a 3.5mm audio jack or wireless capabilities |
| Control Method | Remote |
| Control Type | Media Control |
| Controller Type | Wired |
| Customer Package Type | FFP |
| Customer Reviews | 4.5 out of 5 stars 164 Reviews |
| Ear Placement | On Ear |
| Earpiece Shape | On-Ear |
| Enclosure Material | Metal |
| Form Factor | On Ear |
| Frequency Range | 30 Hz - 17,000 Hz |
| Frequency Response | 17000 Hz |
| Headphone Form Factor | On Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | On Ear |
| Impedance | 32 Ohms |
| Impedance Unit of Measure | 32 Ohms |
| Is Autographed | No |
| Manufacturer | Koss Corporation |
| Model Name | Retro On-Ear Headphones |
| Model Number | P/21 |
| Network Connectivity Technology | Wired |
| Noise Control | None |
| Number of Items | 1 |
| Product Features | Adjustable Headband |
| Sensitivity | 104 dB |
| Specific Uses For Product | Music |
| Style Name | Retro |
| Theme | Retro |
| UPC | 021299197639 021299196670 |
| Unit Count | 1 Count |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | Bluetooth |

## Product Details

- **Brand:** Koss
- **Colour:** Orange
- **Ear Placement:** On Ear
- **Form Factor:** On Ear
- **Impedance:** 32 Ohms

## Images

![x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver - Image 1](https://m.media-amazon.com/images/I/716Ss8sYruL.jpg)
![x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver - Image 2](https://m.media-amazon.com/images/I/71Z-84VSIkL.jpg)
![x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver - Image 3](https://m.media-amazon.com/images/I/61oHG7kx8eL.jpg)
![x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver - Image 4](https://m.media-amazon.com/images/I/71ApUngkdFL.jpg)
![x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver - Image 5](https://m.media-amazon.com/images/I/71vOR-Z14rL.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

### ⭐⭐⭐⭐⭐ Replacing my comparable old Sony headphones.
*by K***H on 30 July 2025*

These are really impressive for the price and design. I have a pair of old Sony MDR-005 that I wear when casually listening to my Walkman DAP around the house. These headphones sound much better. They have great range and are very clear. The bass is very full and strong while not being overwhelming. My Sony headphones are getting up in age so these will be the replacement and I am more than happy with that. I am a guy with a pretty big head and these fit comfortably, I forget I am wearing them. If you been considering these for the form and function I say go for it!

### ⭐⭐⭐⭐⭐ Good quality for the price.
*by R***D on 2 June 2026*

Already bought one-pair ... for the price .. pretty good quality.

### ⭐⭐⭐⭐⭐ Good Quality Retro Design Sony's style headphones
*by M***E on 14 November 2025*

The sound quality is very good, even if the frequency range spec says 30-17,000Hz. Light weight and comfortable. Yes, others can hear what you are listening to, like in the 80's. Best Sony's style 70's headphones I can find today. Bought this to match my newly purhcased cassette tape walkman.

## Frequently Bought Together

- Koss x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-14*