DSS er lavet ud fra X41 transmitteren, så delene er de samme. Eneste forskel er som du skriver er at X41 er trådløst. Dog kan man selvfølgelig og bruge flere forskellige headset til DSS.
Jeg er ikke lige klar på hvad du mener med simuleret. Se herunder for en smule forklaring på engelsk. Taget fra Turtle Beach's hjemmeside :
How does Dolby® Headphone technology create 7.1 surround sound with the stereo X41 headset?
Most XBOX 360 ® games include a surround sound audio track that’s encoded in Dolby Digital format, which is accessed by using the XBOX® digital output connector. In order to hear the surround sound, your audio system has to split this digital stream into 5.1 or 7.1 channels (depending on the game), each of which is sent to the individual surround sound speakers in your home theater speaker system.
The X41 transmitter includes a digital signal processor (DSP) that splits the Dolby Digital audio stream into 7.1 channels. It then uses Dolby Headphone post-processing with Head-Related Transfer Function (HRTF) technology to combine these individual channels into a special type of stereo signal that mimics the way your ears hear natural sound. The result is an astoundingly accurate surround sound experience with wireless stereo headphones.
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With the Ear Force DSS, video game and movie fans will be able to hear distinct audio events happening all around them, greatly enhancing the overall experience and rewarding gamers with a newfound competitive edge. DSS users playing games and watching movies on their game consoles will actually hear the 7.1 surround sound from certain 5.1 channel audio tracks via additional “hidden” channels called Dolby EX.
Håber det forklarer lidt, og ikke er mere forvirrende end oplysende