The electronics landscape has changed dramatically since the Ultima2 line was released. Ten years ago when the Salon2 hit the market you didn't have 2-channel gear with advanced DSP and room correction readily available. Now you have options from Lyndorf, DEQX, Anthem, Legacy, Trinnov, and others plus in-line Dirac processors from MiniDSP, not to mention all of the PC-based systems if you use a computer as a source.The statement that the tone controls "were removed to clean up the crossovers" in the new F228 implies that the Salon 2 would be better without them. I am not buying the statement. It is possible that deleting the tone controls simplifies that design of the crossovers, reducing the cost, but the cost of the F228 is twice that of the F208.
I have not made the final decision yet. The salon 2s/studio 2 are too intrusive for the intended room, which leaves the F36, F208 and F228. I do believe the last two are more refined. Leaning toward the F208 for its share value. Pity it does not have the ceramic cones, which I think is a real advance. I am sure the new tweeters are great but an old dog like me would not benefit greatly from tweeter's extended range.
As a matter of philosophy I think that other than the speaker and the source material, the most important determinant to how your music sounds is the room in which the speaker is placed. Having the tone controls helps contour the speaker to the room. Yes, I know that you can do the same with external electronics but I want to believe that Revel has calibrated their tone controls to match their speakers crossovers and therefore should be superior to any external electronics. I know that there are fancy calibration software/hardware but I am not sure I want to delve into that complexity. What I want is an excellent set of speakers, whose voice I will love, and are easy to place and contour to a room with a minimum amount fuss. Then I can sit back and enjoy the music. I think many of my friends desire the same thing.
I look forward to someone's review of the F228 on comparison to the F208.
Adjusting bass response with port bungs or boundary switches is like using a sledgehammer while modern DSP is like a scalpel. As far as treble goes that can be best addressed by adjusting toe-in and judicious use of room treatments.