Rio Car player is also known as empeg MkIIa. It differs from MkII (the last 'proper' empeg) only in having 4MB of RAM more (16MB vs. 12MB) and some *very* minor internal hardware cleanups.

More disk space brings you more music (or other storage) capacity, nothing more. What did you mean by 'more equalizing'?
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Dragi "Bonzi" Raos Q#5196 MkII #080000376, 18GB green MkIIa #040103247, 60GB blue