ARC REF 6 upgraded by ARC.

$5,000 upgrade to have each hour thereafter sound better the larger cost of trading in, well worth it to me. Ultimately it’s going to cost less that $.50 per hour.  I have heard the difference between the Ref 3 phono stage and the Ref 3SE. I already have a REF6SE… so do not need the upgrade. 

OP,

I went from a REF5SE to REF6SE so, no direct correlation.

However, I have heard long term the REF 3 phono stage and the REF 3SE Phonostage. I believe the internal changes we similar if not exactly the same as would be for the preamp (I think the two are nearly the same unit overall). The change was subtle but important. Greater detail and lower noise and higher dynamics. I would do it… as opposed to waiting for the REF 7.