The KPH40 Utility Series On-Ear Headphone is an all-new way to experience the Sound of Koss®.
Koss Utility Series features a detachable cord system that gives you the freedom to connect to the devices you own now, or in the future with the included 3.5mm Utility cord or the additional USB-C Utility cord or Utility Bluetooth Adapter.
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82 ratings
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Great headphones
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Jeff · October 16, 2026
Wow out of the box
Wow, out of box the sound quality has been very good. I'm not an audiophile, but I have several earphones (Shure, Sennheiser) and headphones (Bose, Sennheiser). I am enjoying the sound profile and the sleek design.
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Ewa · September 18, 2026
Sound quality perfectly satisfied my expectations, equal in performance to my sennheiser XP 550 II, although listening with open ear headphones is a different experience than over the ear for sure, the soundstage is less immersive. Love how lightweight they are, I can wear them around my neck and forget them entirely, and I don't have to worry about indents in my hair from the band since it's so thin. I like the flat cords. When I move my jaw sometimes the area where the driver chasis connects to the headband creaks in a crackly sounding way, but it doesn't feel fragile and isn't a sound issue but a build issue. I do get listening fatigue after around 2 hours because of the pressure of the foam against my ears, but the foam itself is a fine texture. I ordered yaxi pads to fix this but I got the wrong colors so will have to return them and wait and see what kind if difference they make.
