Very interesting. I love getting multiple takes on something like this.
Would seem to be a case where it’s hard to argue it was made better based on the measurements. Personally I would have no interest in “upgrading” a speaker I already like. I’d rather just buy something different.
But hey no doubt GR focuses on providing better quality crossover parts and doing other textbook things to make a speaker “better” like adding bracing etc. Those are very clear and cut things that are hard to argue against from a pure technical perspective.
Certainly NOT snake oil. The exact opposite in fact. I would tread lightly on that take.
People here should love the fact that one would actually have to listen to a before and after mod to see which was preferred. I’d very much like to do that. In the end it’s what sounds best to each that matters, though hard to argue against using better quality parts as long as the design approach is solid. No doubt many companies cut corners where needed to maintain a profit margin and some are much smarter about how they do that than others. Was this even a case like that to start with?