Hello, you can expect only minimal increase in sound quality, but nothing like the price of this upgrade would suggest. No matter how good this upgrade is, you still have the power supply and delicate input stages in the SAME box. If you really like SF gear, sell your line 1 for around 1K, and with what you would usually spend for a Line 1 upgrade, get a Line 2 with better than the stock tubes. I much better investment...
