More speakers are for a better panning effect. Because surround speakers
are usually smaller and less powerfull than the mains, you'll hear the
transitions better, they have poor stereo imaging or whatever,
and this is why they add a rear center speaker f.e.,
that way the distance between the 2 surround channels becomes smaller
and you get a better panning effect from one side to the other, and
it seems you're getting a stronger stereo effect behind you.
>
> By 4.1 I meant first generation surround with a subwoofer added in. I
guess
> I am a purist, but not for nostalgia or anything emotional... I just don't
> get it from an engineering perspective. If you put half of the sound you
> want centered behind a person into each of the two rear speakers, this
> should be no different to the ear than a rear center channel with all of
the
> sound.
>
> Is it about increasing the size of the sweet spot... I guess getting the
> full effect from only four speakers does require the listener to be pretty
> well centered. (Maybe I am just being wishful because I can't afford any
> more speakers!)
>
> Cheers!
>
>
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