I've been active on Head-Fi for the past three years throughout my headphone journey which recently led to an upgrade to Senn HD600 or HD650 (I'm still deciding between the two). After much research I also decided to purchase a recently (post-Black Friday '14) built Crack +SB unit from a Head-Fier with impeccable classified reviews. He was amazingly helpful and I trust him.
As a total noob to OTL amps, and relatively new in mid-fi phones. I'd like to read up and was wondering how to get a hold of the user manual. I'm also welcome any other advice from you on how to educate myself.
Many thanks.
Sincerely,
Daniel