NA522 boards - different models

[David Scott]

Hi there,

Does anyone know what the differences are between the different versions of the 522 MM phono boards (522/1 - 522/4 I believe)? As in what changed and why, and do the later ones sound better/different/just the same?
Thanks a lot,

David

 

[MJS]

The revisions only refer to the PCB version. The circuit has remained the same since pretty much the mid 1980s.

 

[David Scott]

Thank you.