I had somethiny very similar with my 861v4 a couple of weeks ago.

Shipped the unit back to Meridian, who happily put a hole in my credit card and replaced the broken PSU with a shiny new linear PSU.

Have to say, I'm genuinely surprised by the improvement in sound quality that's resulted. Based upon the comments, was expecting one of those "can I tell the difference..." moments. That's NOT what I got. What I got was a lot of additional texture and an even smoother sound. Absolutely gloriously lovely.

Let me put it like this, if you have an 861v4 and haven't yet spent the cash, go get one!

Last edited by Mr_Sukebe; 2015-05-18 12:03.
861v4/ID40/LPS, HD621, Roon, BAT VK-600se, Impulse Ta'us. Director/Heed Canamp with HD600s.