I don't think it's a matter of what the empeg DSP can reproduce. My recollection is that they used a top-of-the-line DSP of better quality than what you would find in an expensive sound card for your PC. The issue is the encoding method. My understanding of the MP3 codecs is that freq's above 16Khz suffer significantly depending on the data rate and coded used.

I can't tell the difference between a CD player in the car and the empeg playing the same song when recorded at VBR high quality. I'm sure others can, but I can't. I haven't noticed missing those freqs, but then I'm not an audiophile (the car's the wrong place for an audiophile anyway). If you really needed that kind of frequency response you could record your music in MP2 or pure WAV format - which the empeg can play back without loss. Probably what you would want to do in competition.

Cheers,

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List 351, empeg 00045, 10gb, Amber