Hi, I had the 1C's a few years ago. I could not get them to lock-in either. I tryed everything. I'm not a big fan of Vandersteen speakers (1C' and 2CE's) they aren't real clear sounding (kinda veiled) and harder to drive for tube int. amps. I also had trouble getting the Meadowlark Kestrel to sound right.
Good luck,
Jerry
Good luck,
Jerry