I own a SFL-2 Preamp which was bought used. Eventhough everything is great with it, I wondered if there are any upgrades offered by Sonic Frontiers since it was produced...I do not mean different type of tubes but parts upgrades. Furthermore, are there any dramatic changes that have been experienced with different types of tweeks or cables? Any input is appreciated.
Upgrade to a SF Line 3 preamp and you will not be disappointed. I upgraded from a SFL-2 also, and without any question Line 3 is a major step up in sound quality compared to the SFL-2. More refined and neutral.