OK- you asked... IMO/IME ARC has had a 'house sound' for a long time. To me it has always been slightly dry, conservative, good definition, but not lively. So far in terms of preamps I have heard they have all been some variant of that house sound.
Not exactly sure how to interpret this statement, but if we are talking about passive components, I think you are right- they have improved. Transistors these days is another matter- the manufacturers are less interested in making linear transistors and there are a lot of counterfeits that have no-where near the performance they are supposed to have. This is one reason why class D is showing up more and more (not to mention they are a lot cheaper to build).
I gotta believe that transistors and other passives are simply better than what was out there in the early days.
Not exactly sure how to interpret this statement, but if we are talking about passive components, I think you are right- they have improved. Transistors these days is another matter- the manufacturers are less interested in making linear transistors and there are a lot of counterfeits that have no-where near the performance they are supposed to have. This is one reason why class D is showing up more and more (not to mention they are a lot cheaper to build).