Sonic frontiers

Back in the day Sonic Frontiers made some very good and affordable gear , too bad they decided to get into home theater (Anthem) and discontinue their stereo line. I had a Line 1 and 3 preamps and both were excellent for the money. Their puck shaped remote is my all time favorite. I believe upgrades are still available for the amps and preamps. 

Chris Johnson is still in business. You might contact him for possible upgrades

Some of the worst sounding tube amps I have ever heard. Know less about the preamps, but would avoid the amps. Not to upset anyone but you asked.

I always had the feeling that their Line preamps were better value soundwise compared to their accompanying power amps.

Still have my Line 2 (modified), and sold my Power 2 easily.

Parts Connexion upgrades are worthwhile improvements.

I bought a used SF tube power amp.  I believe it was an Amp3. Very bassy and muffled sounding.  How in the world did Stereophile give it such a good review?  We’re they deaf?