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.

*Mini XLR supports balanced audio connections with compatible third-party cables
 

• 12-22,000 Hz
• 54 ohms
• 92 dB SPL/1mW

• 287 g (348 g with cord)

• 6.5 ft (2 meter) detachable braided and jacketed cord with mini XLR connectors (includes 3.5mm to 6.3mm adapter) Mini XLR supports balanced audio connections with compatible third-party cables
• Magnetically attached ear cushions wrapped with ultra-soft velour
• Koss engineered RLX44 dynamic driver system with multilayer polycarbonate diaphragm, Neodymium magnet and lightweight Copper-Clad Aluminum wire voice coil housed in a reinforced 44 mm resin frame
• Auto adjusting head sling with precision-stitched vegan leather headband

• Limited Lifetime Warranty