mobbaddict
Headphoneus Supremus
Would you say that tubes help making the HD600 sound more liquid, and maybe closer overall to the sound of a good planar for instance? (I think that's the greatest quality of planars)600 sounds good with BH Crack, but it's probably not accurate of an amp feed (notice I don't mean accurate in terms of how it sounds) in terms of THD, yada yada. A accurate solid-sate actually may sound worse.
There's something about OTL that does to the sound to make it seem less prickly, a little bit softer feel when the dynamics are hitting. The vocals seeming fuller. Perhaps this is the added harmonics, since it's tubes right?
Something I never understood is how the Sennheiser 300 ohm bass is interacted with OTL output. Is Crack capacitor coupled? I know Zana Deux Super is capacitor coupled output, and it sounds like a super BH Crack with similar characteristics with Sennheisers. The difference is, ZDS is 10 ohms on high gain, and 3 ohms on low gain. BH Crack is usually 120 ohms? But, I experienced significant amount of bass out of OTL (not matter if it's 10 ohms or 120 ohms), and I wouldn't call it loose or wooly bass either.
Tubes will help with perception of sound stage, and I suspect it has to do with harmonics to the sounds to create a certain decay characteristics to create a perception of an environment in the sound.
I have a Fiio k5 pro on its way but your comments give me second thoughts.