---
product_id: 565138913
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: "¥16622"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/565138913-x-retrospekt-p-21-retro-on-ear-headphones-retro-orange
store_origin: JP
region: Japan
---

# 104 dB sensitivity for rich sound 30-17,000 Hz frequency range Adjustable stainless steel headband x Retrospekt P/21 Retro On-Ear Headphones, Retro Orange Foam, Adjustable Headband, Wired 3.5mm Plug, Orange Black and Silver

**Brand:** koss
**Price:** ¥16622
**Availability:** ✅ In Stock

## Summary

> 🎶 Own the retro sound revolution with Koss x Retrospekt!

## 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?** ¥16622 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/565138913-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

- • **Comfort That Lasts:** Lightweight, adjustable stainless steel headband ensures a perfect fit for marathon listening sessions.
- • **Precision Audio Range:** Experience crisp highs and full-bodied bass with a wide 30-17,000 Hz frequency response.
- • **Plug & Play Simplicity:** Universal 3.5mm wired connection compatible with all your favorite devices—no Bluetooth fuss.
- • **Retro Vibes, Modern Sound:** Classic orange foam meets Koss' signature audio clarity for a standout look and immersive listening.
- • **Hear-Through Open-Back Design:** Feel the music breathe with an expansive soundstage that keeps you connected to your surroundings.

## Overview

The Koss x Retrospekt P/21 Retro On-Ear Headphones combine iconic retro styling with advanced audio technology, featuring a 30-17,000 Hz frequency range, 104 dB sensitivity, and a durable, adjustable stainless steel headband. Designed for comfort and superior sound clarity, these wired headphones deliver an expansive listening experience through their hear-through open-back design, making them the perfect blend of vintage cool and modern performance.

## 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.

## 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
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B092DX27G9 |
| Additional Features | Adjustable Headband, Lightweight |
| Age Range Description | Adult |
| Antenna Location | Calling, Gaming, Music |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #63,930 in Electronics ( See Top 100 in Electronics ) #281 in On-Ear Headphones |
| Brand | Koss |
| Built-In Media | Cable |
| Cable Features | Retractable |
| Carrying Case Material | Stainless steel |
| Color | Retro Orange |
| Compatible Devices | Any audio device with a 3.5mm audio jack or wireless capabilities |
| Connectivity Technology | Wired |
| Control Method | Remote |
| Control Type | Media Control |
| Controller Type | Wired |
| Customer Package Type | FFP |
| Customer Reviews | 4.5 4.5 out of 5 stars (165) |
| Earpiece Shape | Rounded pads that rest on the ear |
| Enclosure Material | Metal |
| Frequency Range | 30-17,000 Hz |
| Frequency Response | 17000 Hz |
| Headphone Folding Features | On Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | On Ear |
| Impedance | 32 Ohms |
| Is Autographed | No |
| Manufacturer | Koss |
| Model Name | P21 |
| Model Number | P/21 |
| Noise Control | None |
| Number of Items | 1 |
| 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 | Bluetooth |

## Product Details

- **Brand:** Koss
- **Colour:** Retro 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)

## 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.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.jp/products/565138913-x-retrospekt-p-21-retro-on-ear-headphones-retro-orange](https://www.desertcart.jp/products/565138913-x-retrospekt-p-21-retro-on-ear-headphones-retro-orange)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-05*