ToTo Man
500+ Head-Fier
The 600 never came near exhausting my Rag, no need to come out of Class (4 wpc). It does sound better with the balanced hook up vs the SE (about 3x more power).
Well if 800-850 mW is enough, then there is something about the tube circuit. I never warmed up to all tube amps, did have two hybrid tube pre-amps in the 80-90's.
About 15 months ago a buddy from here lent me the BH Crack specifically for the 600. Certainly deeper bass, and a sort of jagged but well wider sound stage, and of course that subtle/sweet harmonic decay in the treble thing. I bought a kit and just got back to it. It's useless w/ planars, so for me, just the 600.
Adding or allowing a little THD in is a regular trick/design of SS outfits that sweetens up the sound. See Pass amps among others. Don't understand tube circuits/design criteria well. Could be I got into a cult. That would mean a can with bass flat to 20 Hz is liable to sound fat on the BH Crack. OK for me because all my cans that play low bass are planars and they don't work on the BH Crack.
I recently demoed a Woo Audio WA8 Eclipse, a SET tube headphone amp. Despite all my headphone amps sounding different to my ears, they all measure exactly the same FR on the miniDSP EARS. The WA8 is the first amp I've tested that actually measures different! Bass is boosted by +1.5dB between 20Hz-70Hz and treble rolls-off above 12kHz. It is a very distinctive sounding amplifier. Would be interesting to hear how the BHC compares...
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