Took a few days to slowly savor the process of building the Crack! As expected, it sounds completely lovely with my Sennheiser HD 600s. As for the speedball, I have another reason to not integrate it during the initial build - It was definitely fun to listen to some of my favorite music, with the Crack, and my 'nice' (for me!) Cans while building the upgrade circuits on my bench!
Any general idea for how many hours listening I should expect for break-in ? Would love to hear this little baby at its best before I drop in the CCCC !
Tia,
Ewing