True the 110V primary current will be just over double that of the 230V designs and the US fuse appears to be double T5A v T2.5A

I2T may be the problem if it isn't solely transformer inrush blowing the fuse (which given the problem description it doesn't sound like a pure inrush problem).

The rapid switching of the load by the AC200 being off / coming on late (if this indeed what is happening) may be causing transients in the fuse which if still stressed from the inrush current may be pushing it thermally over the edge.

If the speakers can be in standby for ages and then turning the AC200 on causes the fuse to blow (so that the fuse has definitely recovered from the transformer inrush) then that's a pretty nasty load condition if the fuse blows in that scenario.

I have to say that in my system the G61R is always powered when I power the M6s so it's not fair to definitely say this doesn't happen on 230V.

I'd offer to try powering them on with the G61R off but I don't have any spare fuses to hand!

One for the Meridian design engineers or UK dealers to try!

Last edited by S2000; 2015-01-24 00:41. Reason: clarification
Various from vintage to SE