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Originally Posted by hidehide /img/forum/go_quote.gif
Ho
So how does 27h compared with HA-1??
if you can afford the 27h I'd suggest you go that route.
beyond what I've said in the ether c thread post I linked and the above post.
the sound is more delicate, in tracks like walking tree by trevor green you can hear it in the attack and the pulsing sustain of the handpan in that track.
the ha-1's treble in comparison has a more plastic sound some call it a digital sound, that sort unnaturalness seems to be a issue with a lot of 9018 dac's, the ha-1 does a better job than a lot but the 27h does such a good job I'm yet to detect even a hint of unnaturalness in the treble, the bass appears to be more extended lower down.
the ha-1 is a great powerful fully balanced option for it's money, the amp section is worth it's price alone imo, it's way smaller could I live with the ha-1 yes, am I happy I've upgraded though heck yes!
the one gripe I've found with the 27h is when I plug in my b&o h6 2nd gen and senn cx3.00's into the single ended jack (not something I really intend to do a lot of but had to give it a shot) I hear a transformer hum noise in the left channel, those phone's are 32ohm and 16ohm, I don't have any higher ohm headphones on hand to try, so I can't comment on if it still there at a higher ohm load, I also don't currently have any way of testing the front dual 3pin jack's
the hum isn't audible when music is playing just when music isn't playing or if I listen to a track with some silence
when plug those phones into the ha-1 it's dead quiet.
I hear no hum with the 22ohm mrspeakers ether c from the 4pin jack though.
if you have any specific questions ask away, if you'd like me to a-b them using a genre of music of something like that I'm happy to do so, they both sit stacked next me all day and will for another week or so I'm testing the schiit wyrd, stock usb cable vs schiit pyst & ausioquest usb cables using both dac amps
then I'll going sell the ha-1
EDIT: The 27h also runs much cooler to the touch vs ha-1, for reference the part of my mac's screen that is over the power supply is currently warmer than the 27h to the touch, they've both been running for almost 6 hours today