Transparent Sound
CL/20i delivers high-fidelity audio you can hear and see, with it's unique clear transparent design.
A Clear Winner
From headband to cord, CL/20i let's listeners take a glimpse inside the Sound of Koss.
The Sound of Koss
Experience deep bass, crisp highs and a full midrange from 30-22,000 Hz
The Perfect Fit
Plush leatherette cushions and an adjustable headband deliver a comfortable listening experience.
Stay Connected
Answer/End calls and Pause/Play/Skip tracks with in-line OneTouch Mic + Remote.
Durable Design
CL/20i features a durable, ultra lightweight design ideal for for travelers, musicians and listeners on-the-go.
Leatherette Cushions
Plush leatherette cushions provide a comfortable listening experience.
Adjustable Headband
Easily connect to laptops, tablets and gaming devices with a convenient 3.5mm standard headphone jack connector.
OneTouch Mic + Remote
Answer/End calls and Pause/Play/Skip tracks with in-line OneTouch Mic + Remote.
Legendary Sound. Legendary Design.
Hearing is Believing
CL/20i delivers a balanced sound signature with deep bass, crisp highs and a full midrange from 30-22,000 Hz ideal for enjoying high-fidelity music, movies and games. It's 3.5mm standard headphone jack connector lets listeners easily connect to computers, tablets and gaming devices.
Transparent Design
CL/20i features a unique clear, transparent design that calls back to the retro/vintage aesthetic of the past letting listeners take a glimpse inside the Sound of Koss.
More Products From Koss
 Cl/20i |  Porta Pro |  Porta Pro Limited Edition |  Porta Pro Utility |  KPH40 Utility |  KPH30i |  KSC75 | |
|---|---|---|---|---|---|---|---|
Customer Reviews | — | — | — | — | — | — | — |
Price | — | — | — | — | — | — | — |
Type | On Ear | On Ear | On Ear | On Ear | On Ear | On Ear | Ear Clip |
Connection | 3.5mm | 3.5mm | 3.5mm | Utility Series | Utility Series | 3.5mm | 3.5mm |
Utility Series | — | — | — | 3.5mm, Lightning & USB-C | 3.5mm, Lightning & USB-C | - | — |
Audio Controls | OneTouch Remote | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
Microphone | OneTouch Remote | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
Noise Cancelling | — | — | — | — | — | — | — |
Adjustable Headband | Yes | Yes | Yes | Yes | Yes | Yes | — |
Collapsible | — | Yes | Yes | Yes | — | — | — |
Carrying Case/Pouch | — | — | Hardshell Case | Leatherette Pouch | — | — | — |
Transparent Sound
CL/20i delivers high-fidelity audio you can hear and see, with it's unique clear transparent design.
A Clear Winner
From headband to cord, CL/20i let's listeners take a glimpse inside the Sound of Koss.
The Sound of Koss
Experience deep bass, crisp highs and a full midrange from 30-22,000 Hz
The Perfect Fit
Plush leatherette cushions and an adjustable headband deliver a comfortable listening experience.
Stay Connected
Answer/End calls and Pause/Play/Skip tracks with in-line OneTouch Mic + Remote.
Durable Design
CL/20i features a durable, ultra lightweight design ideal for for travelers, musicians and listeners on-the-go.
Leatherette Cushions
Plush leatherette cushions provide a comfortable listening experience.
Adjustable Headband
Easily connect to laptops, tablets and gaming devices with a convenient 3.5mm standard headphone jack connector.
OneTouch Mic + Remote
Answer/End calls and Pause/Play/Skip tracks with in-line OneTouch Mic + Remote.
Legendary Sound. Legendary Design.
Hearing is Believing
CL/20i delivers a balanced sound signature with deep bass, crisp highs and a full midrange from 30-22,000 Hz ideal for enjoying high-fidelity music, movies and games. It's 3.5mm standard headphone jack connector lets listeners easily connect to computers, tablets and gaming devices.
Transparent Design
CL/20i features a unique clear, transparent design that calls back to the retro/vintage aesthetic of the past letting listeners take a glimpse inside the Sound of Koss.
| Frequency Response | 30-20,000 Hz |
|---|---|
| Impedance | 60 Ohms |
| SPL | 103 dB SPL |
| Connector | 3.5mm |
| Cushions | Leatherette |
| Headband | Adjustable |
| Microphone | OneTouch Remote |
| Audio Controls | OneTouch Remote |
More Products From Koss
 Cl/20i |  Porta Pro |  Porta Pro Limited Edition |  Porta Pro Utility | KPH40 Utility | KPH30i | KSC75 |
|---|---|---|---|---|---|---|
| Customer Reviews | ||||||
| — | — | — | — | — | — | — |
| Price | ||||||
| — | — | — | — | — | — | — |
| Type | ||||||
| On Ear | On Ear | On Ear | On Ear | On Ear | On Ear | Ear Clip |
| Connection | ||||||
| 3.5mm | 3.5mm | 3.5mm | Utility Series | Utility Series | 3.5mm | 3.5mm |
| Utility Series | ||||||
| — | — | — | 3.5mm, Lightning & USB-C | 3.5mm, Lightning & USB-C | - | — |
| Audio Controls | ||||||
| OneTouch Remote | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
| Microphone | ||||||
| OneTouch Remote | — | In-Line Remote | In-Line Utility Cord Remote | In-Line Utility Cord Remote | In-Line Remote | — |
| Noise Cancelling | ||||||
| — | — | — | — | — | — | — |
| Adjustable Headband | ||||||
| Yes | Yes | Yes | Yes | Yes | Yes | — |
| Collapsible | ||||||
| — | Yes | Yes | Yes | — | — | — |
| Carrying Case/Pouch | ||||||
| — | — | Hardshell Case | Leatherette Pouch | — | — | — |