There is no question the 7.5 is a different (better IMO) preamp completely than the ARC Ref3. Too often they are mentioned in comparison to one another, not sure why completely. The 7.5 is a different animal altogether, from price point to form factor.
I think as far as tubed preamps go, the buck stops with the 7.5 hands down.
I think as far as tubed preamps go, the buck stops with the 7.5 hands down.