World bestseller - but which Sony player back then wasn't a bestseller ?
The 338ESD is the lower-end and later companion of the (bestselling) CDP-557ESD and follower of the (bestselling) CDP-337ESD ; it fits in just before the appearance of the famed (and, yes, bestselling too) CDP-X7ESD.
Inside isn't the mighty KSS-190A laser but the equally excellent and more widespread (somewhat) KSS-151A - guaranteed twenty years of use, if not more. The mechanism rests on an integral G Base.
Filtering is done by an 8fs / 45bit Sony noise-shaper IC while actual d/a is done by two BurrBrown PCM-58PJ for dual 18bit resolution.
As in all of Sony's late 1980s / early 1990s players, the parts used are always excellent : ELNA for Audio, Nichicon Muse, copper bus bars, excellent PCB layout.
However, lower-end oblige, there is no chassis copper-plating here or mammoth transformer(s).
There are seemingly two versions : a dual-transformers and a single transformer....