Dan Meinwald, the US importer of EAR products, has responded every time I contacted him before and after my purchase of the Acute. Really excellent communication and service.
One peculiar thing, absolutely no owners manual or instruction sheet comes with the Acute. I contacted Tim de P and he mentioned that he was thinking about producing one but not sure.
Airfla,
If you're thinking about tube rolling, the USA white label Amperex 7308 are excellent as are the 1960s Seimens CCa. Both enhance the performance of the Acute dramatically over the provided stock tubes although they aren't BAD. But they should be changed if you want to fully realize the potential of the Acute. Just my opinion of course but I think there's a good chance that you'll agree :~).
One peculiar thing, absolutely no owners manual or instruction sheet comes with the Acute. I contacted Tim de P and he mentioned that he was thinking about producing one but not sure.
Airfla,
If you're thinking about tube rolling, the USA white label Amperex 7308 are excellent as are the 1960s Seimens CCa. Both enhance the performance of the Acute dramatically over the provided stock tubes although they aren't BAD. But they should be changed if you want to fully realize the potential of the Acute. Just my opinion of course but I think there's a good chance that you'll agree :~).