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Hands on: Grado's first wireless open-back headphones, the GW100

Grado is a well-known brand in audiophile circles, and one of the few companies to specialize in open-back headphones. Believe it or not, the GW100 is only their first Bluetooth model. A quick primer: most headphones are closed-back. That means that their drivers and so forth are shielded, improving qualities like noise isolation.