Not all 5 series were great.
Mark Levinson makes great linear amps, all of them sound upper end audio, even the very old models.
They did stick their foot into Class-D with the hideously expensive $50K No.53 Class-D monoblocks, credit to them trying very hard to get rid of the inherent problems that plague Class-D, but it never reached the achievements in sound quality they got from their linear amps.
https://www.stereophile.com/content/mark-levinson-no53-reference-monoblock-power-amplifier
Cheers George
Mark Levinson makes great linear amps, all of them sound upper end audio, even the very old models.
They did stick their foot into Class-D with the hideously expensive $50K No.53 Class-D monoblocks, credit to them trying very hard to get rid of the inherent problems that plague Class-D, but it never reached the achievements in sound quality they got from their linear amps.
https://www.stereophile.com/content/mark-levinson-no53-reference-monoblock-power-amplifier
Cheers George