I have one of these for a few years now, they work. Audio Proz in Boston will upgrade yours for about $250. VInce, the owner, worked with the designer and is an expert on these. I have spoken with him, if you have any questions call him, he loves to talk audio electronics
.https://www.audioproz.com/AP.php?About_Us
If I had $2000 I would buy a Sugar Cube, digital pop and click remover.
.https://www.audioproz.com/AP.php?About_Us
If I had $2000 I would buy a Sugar Cube, digital pop and click remover.