Nine speakers may seem like overkill, but Dolby's pro Logic IIz fulfills the promise of surround sound: audio that envelops you from all over, not just the sides.

配置九个扬声器似乎显得小题大做，但杜比的Pro Logic IIz的确实现了环绕声音的产品承诺：让声音从四面八方把人包围，而不是只从某些方位发出。

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Up top, you'll find indicators for Dolby Headphone, Dolby Digital EX, Dolby Pro Logic IIx and Dolby Digital -- these let you know which surround sound simulation, if any, is currently being pushed to the headset.

ENGADGET: Tritton Warhead 7.1 Wireless Surround Sound Headset for Xbox 360 review

The YSP-3050 offers full support for surround sound standards, including Dolby Digital, DTS, Dolby Pro Logic II and DTS Neo:6, as well as CINEMA DSP technology, to create realistic soundscapes in any room.

ENGADGET: Yamaha intros YSP-3050 Digital Sound Projector