The Rogue Hera or Athena is Superb, the 6h30 is the most linear preamplifier tube out there The Bat sound may be darker is because they use a bunch of Jensen oil caps.Where Rogue uses the Excellent Mundorf Supreme
which are a balanced cap in their own right double wound
to cancel inductance and very musical without going over the Top.The Athena is 95% of the Hera and I have owned the big named products .the parts quality alone in the $5k Athena betters most at more than $10k I know I compared
and next to Audiovalve that TAS magazine gave an award to
the Athena bettered that without much trouble .I owned one for over a year,a very good unit but a little colored
and not as expansive.The Hera brings another 5% to the table .Next time you shop compare what's inside and yes both units have seperate power supplys.
which are a balanced cap in their own right double wound
to cancel inductance and very musical without going over the Top.The Athena is 95% of the Hera and I have owned the big named products .the parts quality alone in the $5k Athena betters most at more than $10k I know I compared
and next to Audiovalve that TAS magazine gave an award to
the Athena bettered that without much trouble .I owned one for over a year,a very good unit but a little colored
and not as expansive.The Hera brings another 5% to the table .Next time you shop compare what's inside and yes both units have seperate power supplys.