Koss

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Koss Stereo Headphones
Renowned for the invention of the world’s first SP/3 Stereophone, Koss has been pioneering high-fidelity headphones since 1958 - three generations of American ingenuity, integrity and incomparable quality.

Retro Style. Wireless Freedom. | Porta Pro Wireless delivers unmatched high-fidelity audio, integrated microphone with a...
10/12/2026

Retro Style. Wireless Freedom. | Porta Pro Wireless delivers unmatched high-fidelity audio, integrated microphone with audio controls, and 20 hour battery life.

More Color. Less Charging. | KEB9 in five unique colors with in-line microphone and audio remote, plus a standard 3.5mm ...
10/05/2026

More Color. Less Charging. | KEB9 in five unique colors with in-line microphone and audio remote, plus a standard 3.5mm plug.

Unmistakable clear ‘90s style, now with USB-C and in-line OneTouch remote for taking calls and controlling your music. ...
10/05/2026

Unmistakable clear ‘90s style, now with USB-C and in-line OneTouch remote for taking calls and controlling your music.

You ever miss not having to charge your earbuds? KEB9i, no batteries. No charging. Just plug… and play. 🎶🎶Shop Now: koss...
10/02/2026

You ever miss not having to charge your earbuds? KEB9i, no batteries. No charging. Just plug… and play. 🎶🎶

Shop Now: koss.com/keb9

10/02/2026

All-new KPH30 Wireless Orbital White colorway that’s out of this world. 🔭👨🏼‍🚀🛸

The Power of Koss Utility Series Experience unmatched clarity, transparency, and detail in a one-of-kind IEM with a deta...
10/01/2026

The Power of Koss Utility Series

Experience unmatched clarity, transparency, and detail in a one-of-kind IEM with a detachable cord system giving you the freedom to connect to 3.5mm, USB-C, and Bluetooth devices.

Just $29.99 for a Limited Time only at:
Koss.com/keb90

Visiting Milwaukee?Come see where the Stereo Headphone was invented and add the all-new Koss Factory Store to your agend...
09/28/2026

Visiting Milwaukee?

Come see where the Stereo Headphone was invented and add the all-new Koss Factory Store to your agenda for an up close look at the world's first SP/3 Stereophone, HV/1A, and more as well as explore the full line of Koss Headphones, Headsets, and Accessories.

Koss Factory Store | www.koss.com
4129 North Port Washington Ave
Milwaukee, WI 53212

09/28/2026

There’s only one REAL retro headphone that delivers legendary sound with real, retro soul.

The Next Chapter in the Sound of Koss...The Koss A/550 Open-Back Headphone represents the pinnacle of acoustic engineeri...
09/28/2026

The Next Chapter in the Sound of Koss...

The Koss A/550 Open-Back Headphone represents the pinnacle of acoustic engineering and design. Meticulously crafted from premium materials including stainless steel, aluminum, ultra-soft velour and precision-stitched vegan leather, every detail has been considered to deliver unparalleled performance, durability and comfort.

Koss engineered RLX44 54 ohm dynamic drivers specially designed for A/550 incorporate a multilayer polycarbonate diaphragm, precision-machined Neodymium magnet, and lightweight Copper-Clad Aluminum wire voice coil housed within a 44 mm reinforced resin frame. This advanced configuration delivers breathtaking high-fidelity audio with a wide frequency response of 12 Hz to 22,000 Hz.

A/550 also features a detachable cord system with Mini XLR delivering pro-grade reliability, secure locking and support for balanced audio connections* for expanded connectivity with third-party cables. Get started with the stunning braided and jacketed 3.5mm cable and included a 6.3mm adapter.

The next chapter in The Sound of Koss® delivering an extraordinary listening experience all backed by the Koss Limited Lifetime Warranty.

Shop Now: www.koss.com/a550

Address

Milwaukee, WI

Opening Hours

Monday 8:30am - 4:30pm
Tuesday 8:30am - 4:30pm
Wednesday 8:30am - 4:30pm
Thursday 8:30am - 4:30pm
Friday 8:30am - 2:30pm

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