i think it has a lot to do with the sound system itself

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dave seaman is a legend... photon project and insigma ... masterful. amurai is where trance should be...

I noticed this as well, but till now I've always likes live sets far better than cd tracks because they're mixed much better most of the times, cd's usualy just jump from one song to another while live sets are one continues song with different tunes in it! and that really does sound A LOT better to me