Thanks Richard for your expertise.
As a relative newbie to the forum I have learn’t a lot about the products of Naim although I’ve been running them in ignorance for some little while. Your own and others experiences and expertise has brought me a long way in just a few months. I have also noted an ongoing development of ideas and thoughts on even the older Naim kit. The one thing I like is the testing of ideas against previously known information and this forum allows that. I will update with my experience when I have the DC blocker in place (not an isolation transformer).