I just purchased an AKG 712 pro headphone then rushed back to this site to purchase a Crack 1.1 headphone kit. Now, looking at the numbers it seems to me that the Crack 1.1 and my new AKG's are incompatible. As you can probably surmise I am an aspiring audio kit builder with very little experience. AKG K712 pros have a rated impedance of 62 Ohms. A sensitivity of 105 db SPL/V and a maximum input power of 200 mW. Is the AKG 712 compatible with the Crack 1.1?