Hearing is Beleiving
Legendary. Retro. Sound.
Experience unmatched high-fidelity audio in an ultra-lightweight retro design only Koss can deliver.
15-25,000 Hz
Ultra-Wide Frequency Response
Driven by Koss 60 Ohm dynamic drivers, KPH40/Retro delivers stunning detail, transparency & clarity.
Just 109 grams
Strong as Steel. Light as Air.
An elegant, stainless steel headband delivers a durable, ultra-lightweight listening experience.
The Perfect Fit
A precision-crafted stainless steel headband adapts to every head for unmatched comfort.
Soft Foam Cushions
All Orange Everything
KPH40 Retro features retro-style orange foam cushions for a comfortable listening experience.
High-Fidelity Audio
Koss 60 ohm dynamic drivers deliver breathtaking high-fidelity sound with exceptional clarity and an ultra-wide frequency response from 15–25,000 Hz.
Adjustable Headband
KPH40 Retro features an adjustable headband and articulating ear cups providing a comfortable listening experience for hours of use.
Retro-Style Cushions
Inspired by 1980s Koss classics like P/19 and KFF/100, KPH40 Retro features retro-style orange foam cushions for a comfortable listening experience.
Ultra-Lightweight Design
A precision-engineered stainless steel headband delivers exceptional strength in an ultra-lightweight design, built for portability and longevity.
Real. Retro. Soul.
The Sound of Koss
Drawing inspiration from 1980s Koss classics like the P/19 and KFF/100, the KPH40 Retro combines iconic retro design with modern high-fidelity performance, featuring an adjustable stainless steel headband and retro-style orange foam cushions for legendary portability and the legendary Sound of Koss.
High-Fidelity Audio
Precision-tuned 60?ohm dynamic drivers, mounted on articulating ear cups, deliver exceptional clarity, nuanced detail, and full transparency across an ultra-wide frequency response spanning 15–25,000?Hz for an immersive, studio-quality listening experience.
KPH40/Retro
KPH40/Retro delivers a timeless audio experience rooted in over 65 years of sound innovation and design only Koss can deliver.
Enjoy incredibly spacious, detailed high-fidelity audio with an ultra-wide 15-25,000 Hz frequency response, bringing your music to life with unmatched depth, bass response and detail you have to hear to believe.
A durable, stainless-steel headphone paired with vivid orange retro-style cushions adds a vintage hi-fi aesthetic that looks as good as it sounds.
KPH40 Retro Unboxing
Merchant VideoSee What's Included
Unboxing
Take a closer look at the vibrant retro-style orange cushions, ultra-lightweight stainless steel headband, and 60-ohm dynamic drivers engineered to deliver rich, high-fidelity sound with unmistakable retro soul only Koss can deliver in this unboxing video.
More Products From Koss
 KPH40 Utility |  Standard Cushions |  Oversized Cushions |  Porta Pro Wireless |  Porta Pro Utility |  Porta Pro |  Porta Pro Limited Edition | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Type | On Ear | Ear Clip | On Ear | On-Ear | On Ear | On Ear | On Ear |
Connection | Utility Series | 3.5mm | 3.5mm | Bluetooth | Utility Series | 3.5mm | 3.5mm |
Utility Series | 3.5mm, USB-C & Lightning | - | - | — | 3.5mm, USB-C & Lightning | - | - |
Audio Controls | Utility Cord Remote | - | In-Line Remote | Integrated Audio Controls | Utility Cord Remote | - | In-Line Remote |
Microphone | Utility Cord Remote | - | In-Line Remote | Integrated Microphone | Utility Cord Remote | - | In-Line Remote |
Noise Cancelling | - | - | - | — | - | - | - |
Adjustable Headband | Yes | - | Yes | Yes | Yes | Yes | Yes |
Collapsible | - | - | - | Yes | Yes | Yes | Yes |
Carrying Case/Pouch | - | - | - | Hard Shell Case | Carrying Pouch | Carrying Pouch | Hardshell Case |
Hearing is Beleiving
Legendary. Retro. Sound.
Experience unmatched high-fidelity audio in an ultra-lightweight retro design only Koss can deliver.
15-25,000 Hz
Ultra-Wide Frequency Response
Driven by Koss 60 Ohm dynamic drivers, KPH40/Retro delivers stunning detail, transparency & clarity.
Just 109 grams
Strong as Steel. Light as Air.
An elegant, stainless steel headband delivers a durable, ultra-lightweight listening experience.
The Perfect Fit
A precision-crafted stainless steel headband adapts to every head for unmatched comfort.
Soft Foam Cushions
All Orange Everything
KPH40 Retro features retro-style orange foam cushions for a comfortable listening experience.
High-Fidelity Audio
Koss 60 ohm dynamic drivers deliver breathtaking high-fidelity sound with exceptional clarity and an ultra-wide frequency response from 15–25,000 Hz.
Adjustable Headband
KPH40 Retro features an adjustable headband and articulating ear cups providing a comfortable listening experience for hours of use.
Retro-Style Cushions
Inspired by 1980s Koss classics like P/19 and KFF/100, KPH40 Retro features retro-style orange foam cushions for a comfortable listening experience.
Ultra-Lightweight Design
A precision-engineered stainless steel headband delivers exceptional strength in an ultra-lightweight design, built for portability and longevity.
Real. Retro. Soul.
The Sound of Koss
Drawing inspiration from 1980s Koss classics like the P/19 and KFF/100, the KPH40 Retro combines iconic retro design with modern high-fidelity performance, featuring an adjustable stainless steel headband and retro-style orange foam cushions for legendary portability and the legendary Sound of Koss.
High-Fidelity Audio
Precision-tuned 60?ohm dynamic drivers, mounted on articulating ear cups, deliver exceptional clarity, nuanced detail, and full transparency across an ultra-wide frequency response spanning 15–25,000?Hz for an immersive, studio-quality listening experience.
Timeless Design. Tuned for Today.
KPH40/Retro
KPH40/Retro delivers a timeless audio experience rooted in over 65 years of sound innovation and design only Koss can deliver.
Enjoy incredibly spacious, detailed high-fidelity audio with an ultra-wide 15-25,000 Hz frequency response, bringing your music to life with unmatched depth, bass response and detail you have to hear to believe.
A durable, stainless-steel headphone paired with vivid orange retro-style cushions adds a vintage hi-fi aesthetic that looks as good as it sounds.
KPH40 Retro Unboxing
Merchant VideoSee What's Included
Unboxing
Take a closer look at the vibrant retro-style orange cushions, ultra-lightweight stainless steel headband, and 60-ohm dynamic drivers engineered to deliver rich, high-fidelity sound with unmistakable retro soul only Koss can deliver in this unboxing video.
| Frequency Response | 15 - 25,000 Hz |
|---|---|
| Impedance | 60 Ohms |
| SPL | 101 dB |
| Drivers | Dynamic |
| Headband | Stainless Steel |
| Cord | 4ft / 1.2m |
| Cushions | Orange Foam |
| Included | KPH4/Retro with Orange Cushions |
| Connector | 3.5mm |
More Products From Koss
 KPH40 Utility | Standard Cushions | Oversized Cushions | Porta Pro Wireless | Porta Pro Utility | Porta Pro | Porta Pro Limited Edition |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Type | ||||||
| On Ear | Ear Clip | On Ear | On-Ear | On Ear | On Ear | On Ear |
| Connection | ||||||
| Utility Series | 3.5mm | 3.5mm | Bluetooth | Utility Series | 3.5mm | 3.5mm |
| Utility Series | ||||||
| 3.5mm, USB-C & Lightning | - | - | — | 3.5mm, USB-C & Lightning | - | - |
| Audio Controls | ||||||
| Utility Cord Remote | - | In-Line Remote | Integrated Audio Controls | Utility Cord Remote | - | In-Line Remote |
| Microphone | ||||||
| Utility Cord Remote | - | In-Line Remote | Integrated Microphone | Utility Cord Remote | - | In-Line Remote |
| Noise Cancelling | ||||||
| - | - | - | — | - | - | - |
| Adjustable Headband | ||||||
| Yes | - | Yes | Yes | Yes | Yes | Yes |
| Collapsible | ||||||
| - | - | - | Yes | Yes | Yes | Yes |
| Carrying Case/Pouch | ||||||
| - | - | - | Hard Shell Case | Carrying Pouch | Carrying Pouch | Hardshell Case |