Sonic Frontiers Line1 SE upgrade?

Hi Cosmic, I had this upgrade performed on my line one about 2 months ago. The biggest difference to my ears has been that the unit seems much more dynamic now. Surprisingly, the top end seems slightly rolled off though. I would have thought the opposite because of the silver cable that was installed. This may be a characteristic of the tubes that came with my upgrade which are Brimar's. After my listening session last night I decided to install my Mullards again. Later in the day I will listen to those tubes and see what happens to the top end. All in all I am happy with the upgrade but YMMV.

Um, Coop you're wrong, Sonic Frontiers no longer produces new tube equipment but they still perform upgrades as well as handle maintenance and service issues for their tube gear. Paradigm bought out SFI in the late 90's and decided to cease production of the tube gear but they continue to produce "Anthem", which was Sonic Frontiers "lower end" company. You are also mistaken in another thread that you responded to about Outlaw audio. They do not build their products in New Hampshire. More likely being built in China.