I respectfully disagree with Runonce.
PMD 430 if it within normal specs and operating as it should will be fine.
Marantz PMD-430 was a cassette deck that could hold its own with any high end cassette decks of the mid to late eighties and nineties.
The azithmus adj isn't as critical on transfers as precise pitch to the recorded pitch of the source tape.
Correct me if I'm wrong, but if my memory serves me well , the Marantz PMD-430 has a pitch adjustment to finely dial in the playback speed.
This is most useful in transferring taped material and is even more critical than azithmus, however if the tape path azithmus is too far off , then sure, you'll get less than what you should in terms of clean clarity in high freq and throughout mid and lows.
The heads on a PMD 430 were outstanding and its S/n ratio is exceptional even without Noise Reduction when compared to mid level Cassette decks from mid '80's on ward. That 430 will outperform any Nak in recording with its dbx and sn of 92+. S/n with B & C were good as high end decks circa 1988.
It was a quality deck and if it is still in good shape, should do fine!