Originally posted by jfalford I know sony's numbering systems appears to have a logic of its own. How does the D-20 fit into the scheme? Is it as it would seem somewhere between the D-15 and the D-25?
Unfortunately with a few exceptions, Sony uses very little logic in its early numbering system. The D-5 was first, then the D-14, then the D-10, soon after the D-16, etc. The D-20 is actually in the lower line of Sony PCDP's, with the D-11, D-12, and D-9, not the premium line like the D-10, D-15, D-25, and D-35. I believe the true predecessor to the D-25 is the D-15. I've had every unit I mentioned (except maybe the D-15).
Sony then jumped from the two-digit numbering scheme to three digit with the advent of the D-303 and D-555, not to mention the Asian market models tacked an extra zero onto the end of most of the models so D-25=D-250, D-35=D-350, etc.
See the thread on classic Sony PCDP's for more info.