WAFWarrior (or anyone else), there is a contradiction in the A21 and JC2 manuals regarding set-up. The A21 manual prefers the gain controls all the way up, to THX reference, to take them out of the path. But the JC2 manual states that the volume control sweet spot is between 11 and 1 on a clock. With the amp's gain controls all the way up, I listen with the JC2 volume control around 7-8, and there is no way to crank it up to 11 and still stay in the room! I am using a pair of 4-ohm Sonus Faber Olympica III speakers. So which is more important, keeping the gain controls on the amp at THX, or just using the volume control on the preamp as needed, even though it is well less than 11? I am doing the latter, and it does sound great. Thanks.