For some reason the winged C 6550's seem to have disappeared off the market for the moment! Since everyone tells me that these are the tubes recommended by ARC,I am looking to get five of them for my ARC D70.
They seem to be as rare as pixie dust now, with everybody out of stock and not sure of when new stock will arrive or if they will arrive at all. Anybody know what's going on? Better tube suggestions for the ARC?