The model number 4 seldom appears in hi-end audio products, at least not from companies that want to sell any of those products in Asian countries. The number 4 represents bad luck.
Rx8man - Consider the REF 5 the 'REF 3 MkII' - an expensive 'upgrade' where you send your REF 3 to someone else and receive the REF 5 back for 12k minus the money you got for selling your REF 3.
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