Richard Grey Power Company RGPC 400 Pro?

When did Richard Grey come out with the Mark 2 version of the 400 Pro power conditioner?

elb123407-03-2018 11:59pm

jafant Details Discussions Posts This discussion Message User 19,614 posts 07-11-2018 at 11:23am Copy Comment URL Report Comment Edit Delete elb1234 I have had my 400 Pro since 2006. The original 400 was made as a mkII version prior to 2005. There was also a 400s model. Hope this info is helpful to you. Happy Listening!