Audio Research Ref 5 preamp

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I have no interest in auditioning the Ref5. If I hear it and like it, I won't be able to sleep until I get one. So, I'll save myself the stress and sleep and stick with the Ref3. I'm still thrilled with and in love with the Ref3.
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Kurt,

I found about the same thing when I did a direct a/b with the Ref 5 an Ref 3. Nice job......

I can only say Thank God someone in the mainstream is finally cottoning onto R-core transformers, as low definition images of the innards of the Ref 5 seem to indicate they have begun using. Maybe now efficiencies of R-core windings will bring musical joy to more of us. If that is an R-core strapped to the other chassis side opposite the toroidal on the other then I congratulate Audio Research on a fine initial move that way.

say I want to tube roll the stock 6550c tube. I have a Tung Sol 6550, is it okay if I drop that in? I just want to make sure because I don't know what 6550c means in comparison to 6550. Also, there hasn't been any post, buzz or reviews on this preamp lately. Any owner impressions to add?

Compared to my old Ref 3 it has tighter bass and plays complex demanding passages more cleanly. I guess I would call it more " precise". To me it was worth it but some might prefer the Ref 3's darker character. - Jim