From the brand

The Original American Stereophone Company

In 1958 John C. Koss changed the way we all listen to music when he invented the world’s first SP/3 stereophone.
Koss sought to replicate the excitement of a live musical performance, allowing listeners to experience sound as they had never before, bringing them closer to the music they love. Music lovers around the world recognize that dedication to accuracy in sound reproduction as: The Sound of Koss
Porta Pro Collection
Retro Headphones
Utility Series
Wireless Headphones
Best Sellers

Birth of the Stereophone
Before the world’s first SP/3 Stereophone in 1958, John C. Koss developed a portable stereo photograph player with side-wing speakers.

World’s First SP/3 Stereophone
in 1958 John C. Koss invented the world’s first SP/3 Stereophone introducing personal stereo audio to the world.

SP/3X
In 1960 Koss released the predecessor to the SP/3 with a lighter design, more comfortable headband and superior sound quality.

Pro/4AA
In 1970 Pro/4AA set the standard for full-size professional headphones delivering true full frequency performance.

Koss World Headquarters
On June 25, 1971 John C. Koss unveiled the new Koss World Headquarters in Milwaukee, Wisconsin.

HV/1A
In 1974, Koss released the HV/1A the first dynamic headphone capable of reproducing all 10 audible octaves.

Porta Pro
In 1984 the acclaimed Porta Pro was released and set performance and comfort standards worldwide for decades to come.

JCK/300 Kordless System
In 1989 the JCK/300 Kordless Headphone system set the standard for infrared wireless headphones.

ESP/950
In 1990 Koss’s revolutionary ESP/950 electrostatic headphones introduced breakthrough high-fidelity sound.

Pro4S Studio
Carrying on the legacy of the Pro/4 line, 2014’s Pro4S Studio Headphone was specifically designed for audio professionals.

KPH30i
In 2017 Koss released the acclaimed KPH30i featuring an ultra-light weight design with remarkable high-fidelity sound.

Utility Series
In 2021 Koss Utility Series introduced three new headphones allowing listeners to connect via Lightning, USB-C and 3.5mm.

True Wireless Earbuds
In 2023 Koss continued it’s evolution of wireless headphones with the TWS250i True Wireless Earbuds.
Frequency Response – 15-25,000 Hz and Impedance – 16 ohms
Randy F –
Sony cans
The Sony headphones sound good for a small and inexpensive pair. Will use for travel
Randy F –
Amazon Customer –
Great product
Worth price, fits perfect really comfy, easy use
Amazon Customer –
Thomas Jones –
High Quality Audio, Reasonable Price, Worn Equals Comfortable, Find a Mic Somewhere Else
This is a high quality set of headphones for its audio quality, but the two drawbacks it has are the thin cords, and the mic.I love these headphones, and I’ve been using them for a long time. I had one pair that I used for TWO FULL YEARS before they broke. That was honestly just my fault, the jack exploded from dropping my device on it(genuinely me just being clumsy, the jack is a little bit more durable than that).The PICTURES I have displayed here show it has a nice folding design, but be careful with the cords. A little too much tugging will cause some problems for the mic. As for the Cushion, which you see in the second picture, is absolutely amazing. This LOOKS poor quality, but absolutely not, the more it gets worn like this, the better it feels. This second par is a little more noticeable, but my last pair literally felt like they ceased to exist, and I was absorbed in the atmosphere of the game I was playing(SOMA).Like I said, its cord is pretty delicate, and the microphone isn’t that great. If you want a microphone, look elsewhere, but this is the set for audiophiles who hate pressure on their ears!
Thomas Jones –
Nauti Girl –
Perfect For Schoolâ
They sound great.
Nauti Girl –
mrc –
Comfortable and easy to use
Makes lengthy conversations or situations requiring your hands to be free a breeze. One caveat – be certain that your phone has a mini-Jack input. If not (like recent Apple phones) you need an adapter (available on Amazon and at other vendors). The earphones are comfortable and have good fidelity. Construction is more than satisfactory.
mrc –
Baarbarian –
âBlueâ color option is tacky
Iâve purchased this model several times because the sound quality and comfort for the price is unbeatable, so for that I would give these 5 stars. This lower score (3 stars) is strictly a reflection of the hideous Blue color option. The face of each side is highly reflective deep blue. The ring of plastic encasing each side is a matte finish in a different âblueâ which is closer to purple, and the headband is black. Just an eyesore.
Baarbarian –
Mrs. Simmons –
Great quality headphones
I bought this for my child. No issues so far. Will update if any issues arrive.
Mrs. Simmons –
Jerry Soen –
Comfortable, compact, gets the job done
I go to many different computers at a number of different sites and must plug in easily to get on Teams and Zoom meetings. This unit quickly attaches and allows me to be on the meeting quickly and with no problem.
Jerry Soen –
Yahir Flores –
Probablemente los mejores audÃfonos a bajo precio, son super cómodos, la respuesta de las frecuencias es equilibrada. Lo único que criticarÃa es el material, si se tratan con cuidado no le veo ningún problema.
Yahir Flores –
Alex P –
They have a gold plated aux jack, meaning better connectivity no static sounds, the mic is good. The comfort and ease of use is great I can wear these for a long time and be happy. The sound is fantastic.
Alex P –
Paula Ceretti –
 à o segundo fono que eu compro, o primeiro durou quase 3 anos, e eu não sou a pessoa mais cuidadosa do mundo. O áudio é bom, é confortável e dura bastante . O cabo tem um tamanho, que para mim, de 1,50 de altura, é muito bom.
Paula Ceretti –
Adeval de Andrade –
Os fones são muito bons. Só tenho a reclamar do material preto sintético que fica em contato com a cabeça. Com poucos meses ele começa a se soltar, deixando a aparência dos fones feia e sujando as orelhas. Além disso, dá para encontrá-los mais barato em outros sites.
Adeval de Andrade –
WILFREDO CAZON ARRAYA –
O design é muito inteligente e a qualidade é excelente!
WILFREDO CAZON ARRAYA –