Hi,
Read the reviews and cannot tahun. Please count me in for purchase of 1 unit Cayin headphone amp. Thanks for doing all this work headphonecrazy. You can contact me at tzeminn@yahoo.com.sg if you need confirmation.
I hope the Cayin HA-1 can do a better job than my present Bit 88 headphone amp that I use to listen to MP3s and Internet radio :-) I plan to pair it with my Grado-SR60s...
Cheers!