I finally received the Burson V6 Vivid op amps and have several days of listening and comparing these to Bursons V6 Classics. Two totally different sound presentations.
With the Senn HD600's I prefer the Vivids over the Classics, there is a really good pairing here.....that "Veil" we all talk about is once again removed or pushed back so very well that the V-shaped sound signature I hear makes most music I listen to come across as transparent and alive. Norah Jones, Diana Krall, Eva Cassidy are to die for good. There is a point when you crank up the volume with these Vivids the soundstage is like in and outside of you head....the music becomes very alive and wide.
The Classics are just more laid back, good but not as good as the Vivids in the presentation. With the Beyers T90 and T1 the classics are laid back, smooth and not harsh or trebly...they actually tame the T90's somewhat for me and make them very listenable with a wide variety of music. The vivids make the T1's come alive in away that makes them (mine are the second version) more like the original version.
I went back and relistened with the original op amps and the Sparkos SS3601's and my leaning is towards the V6 Vivids for sure. They just make things "pop" and are light saber articulate. The Sparkos are close to the Vivid sound but the Vivids beat out the Sparkos in the three dimensional aspect. They are that good to me.
These discrete op amps cost about $70, the FUN is a $299 amp, and it has been on sale for $199 in the past few months. The Vivids are on Massdrop as well from time to time as are the Classics.
Burson is sending me their Bang Class AB speaker amp that needs a preamp for volume control and I will use the Fun to Drive it and see how well it plays with my Dennis Murphy Modded Pioneeer Desktop Speakers as well as my Salk SongTowers. This shouls be a FUN experiment.
Alex