Isotek not using MOVs instead of using VDR which VDR is recommended?

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Planning to build a power filter system with surge protection but what many use is MOV across mains phase and Neutral but Isotek says using MOV will degrade sound quality and infact when I have tested with noise sniffer from a brand I saw that noise is quite high even with large common mode choke and with x2 and y2 capacitors. Can anyone tell me which VDR does isotek uses?
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.