Originally Posted by jamato8
Well my fi.Q outdid my very, very modified WA6, and it was fine sounding. The F35 really shows what a portable or to the point, what an amp can do. Totally dedicated to balanced and I can understand why Ray did this as it is suited for balanced and not single ended, which would compromise it.
Actually my maxed WA6 with the Pseudo Dual Power Supply mod added by Woo is very nice sounding, with good timbre and tone. But the HD800 seem a little fatiguing with it when using Sylvania VT-231 tubes + Sophia Princess 274b. To tame the HD800 with it I either have to change the driver tubes to RCA or GE 6DE7 with the Sophia, or change the Sophia to an RCA 6AS7G if I keep the VT-231 tubes (with adapters).
With the RCA 6DE7 + Sophia Princess the sound signature is that of my Eddie Current ZDT, but with a smaller, less spacious, and more forward soundstage (plus about 1/5 the max power). This is the setup for using HD800 and high-end Grados. The VT-231 tubes open up the soundstage and improve micro-detail, making the sound better for HD600, HE-500, and LCD-2. The problem is the WA6 need more power for the Orthodynamics if you like to play loud and hard hitting.
Then I pull out the RSA F-35 and connect it to the same DAC, and I'm blown away that I don't need to change opamps to tubes to make it work with these different sounding phones. I'm using balanced cables with SE adapters, so they can be used on both amps (custom IEM, HD600, HD800, HE-500, and LCD-2 rev2).