Let background noise melt away, so you can be alone with your music. The Koss QZ900 headphones feature active noise cancelation circuitry to electronically neutralize external distractions. Your tunes will sound clearer and bolder when they don't have to compete with annoying office noise or plane engine hum. The QZ900 delivers impressive bass response, for deep grooves that will get you through those long flights or endless hours at the office.
Listen anytime with passive mode
Noise-canceling headphones are terrific...until the battery dies. That's why you'll appreciate the QZ900's passive listening mode. If your battery runs low, just switch off the noise-canceling circuitry and you're free to listen endlessly in passive mode. The QZ900's closed-back design provides excellent noise isolation even without the noise cancelation activated, so you can choose when you need that extra noise-blocking power.
Designed for the long haul
Because Koss knows you'll want to listen to the QZ900 for long periods, they built them for long-lasting comfort. The soft foam headband is cushioned yet secure, and the padded earcups make these headphones disappear just like outside noise. Fold them up and stash them in the included travel case, so they're always ready to accompany you on your next trip, near or far.