Dolby Headphone audio processing recreates the sound of 5.1 channel speakers with the X4 headphones, so you can hear every nuance in the game audio all around you without disturbing anyone else in the room.

Dolby surround sound adds incredible realism to your gaming experience, making you a better player. With action games, you can hear where your enemies are coming from and react faster and more accurately. With interactive games, like Guitar Hero® or Rock Band®, you can hear subtle details in the music and sound cues that are missed on speakers, drawing you deeper into the experience.

Dolby Pro Logic II and Stereo Enhancer
The X4 transmitter incorporates Dolby Pro Logic II decoding, which provides surround sound realism from Dolby PL II encoded audio. When used with stereo sources, the Dolby Pro Logic Decoder also enhances the sound by spreading the stereo signal to provide a wider effect. This results in a richer, fuller sound than normal stereo almost as if it originates from outside of the headphones.

Chat Boost Dynamic Talkback Expander
The dynamic talkback expander automatically adjusts Xbox® Live chat levels during loud moments, so chat from teammates isn't lost in the exciting parts of your game. During normal game volume levels, the expander doesn't affect the chat level. As the game audio increases, the chat volume is automatically increased so you can continue to hear what everyone is saying. When the game volume quiets down, the chat level gradually returns to the normal volume setting. It's a simple solution to an annoying problem, and it all happens automatically ? so you don't have to adjust anything!

Microphone Monitoring
If you're wearing headphones, it's hard to hear yourself speak, so you'll tend to talk louder. To address this, the X4 incorporates microphone monitoring. Just like a telephone, the X4 mixes a portion of the microphone signal into the headphone signal, so you can hear some of your voice along with the online chatting and game audio. This lets you easily sense what you're saying, but not so much that it's distracting. Mic monitoring not only helps you stop talking so loud, it also eliminates that annoying "clogged ears" feeling when talking while headphones are covering your ears.

Bass Boost
The X4 headphones incorporate a bass boost feature that produces deep, rich bass tones by increasing the volume of low frequency sounds ? just like turning up the sub-woofer on your home theater system. This can improve your gaming experience by enhancing the sound of explosions, gun shots and other deep-bass sound effects to make them even more dramatic. Bass boost can be turned off with the slide switch on the headphones. You might want to do this, for example, when using the X4 for listening to music that requires a flat frequency response for truer reproduction.

Voice Chat mixed with Stereo Game Sound
Conventional communicator headsets compromise your gaming experience by covering one ear for hearing chat audio and leaving the other ear for hearing game audio pumping from speakers. The X4 overcomes this problem by combining stereo game audio with online chat on high fidelity stereo headphones delivering the ultimate gaming experience with privacy and clarity. There are separate volume controls for the game and chat audio levels, so you can easily balance them and never have to worry about missing a cue from your teammates.