Thanks to all for your responses on this subject. It seems we share both - good and not so good experience with ARC gear. So far ARC and especially my ARC dealer have reacted very quick and obliging. I hope ARC simply had a bad run of components and gets the problem under control.
What seems obvious though is that cost savings at ARC are more important today than a few years ago. While the Ref3 was double-boxed at it's time - Ref5SE and even Ref10 are shipped single boxed - held together with one layer of paper tape. I believe this is the wrong place to save money when shipping sensitive and quite expensive audio gear. Esoteric for example even triple boxes their gear. I like that!
What seems obvious though is that cost savings at ARC are more important today than a few years ago. While the Ref3 was double-boxed at it's time - Ref5SE and even Ref10 are shipped single boxed - held together with one layer of paper tape. I believe this is the wrong place to save money when shipping sensitive and quite expensive audio gear. Esoteric for example even triple boxes their gear. I like that!