Koss PRO4AA Professional Over-the-head Stereo Headphones

Our Take

Koss Pro4AA headphones set the standard for full size professional headphones. They were introduced in 1970 as the first dynamic headphones to deliver true full frequency and high fidelity performance with impressive noise isolating capabilities.

Product Details

The Koss Pro4AA headphones are iconic professional studio headphones with a legacy dating back to 1970. They feature a noise-isolating closed-back design with oversized dynamic drivers delivering a remarkably wide frequency response from 10 Hz to 25,000 Hz. These headphones offer accurate sound reproduction with a sensitivity of 95 dB and a nominal impedance of 250 ohms, ideal for use with professional audio equipment. Durable steel construction combined with generously padded pneumalite ear cushions ensures comfort during extended wear. The adjustable slide bars provide a snug, personalized fit. An 8-foot coiled cable with a 1/4-inch plug offers flexibility and durability. The left earcup includes a threaded mount for an optional boom microphone, enhancing versatility for studio and broadcast settings. The Koss Pro4AA is covered by a limited lifetime warranty and continues to be manufactured in the USA, maintaining its status as a favorite among audiophiles and sound professionals alike for its natural, full-frequency, high-fidelity performance.

This makes the Koss Pro4AA ideal for serious audio professionals, sound engineers, and audiophiles seeking precise, immersive sound with excellent isolation and long-lasting comfort.

Experience legendary audio precision with the Koss Pro4AA professional studio headphones. Featuring a wide frequency response (10 Hz–25 kHz) and robust 250-ohm impedance, these closed-back, over-ear headphones ensure exceptional sound isolation and accurate, vibrant sound reproduction. Crafted with a durable steel frame and plush pneumalite ear cushions, the Pro4AA delivers all-day comfort and a secure fit with adjustable slides. The 8-foot coiled cable and 1/4" plug provide reliable connectivity for professional audio setups. With an optional boom mic mount and a trusted legacy since 1970, the Koss Pro4AA remains a go-to for broadcast and recording professionals seeking vintage-inspired, high-fidelity sound. Covered by Koss’s limited lifetime warranty, it’s a timeless classic made in the USA.

Tech Specs

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