Yes, BigKidz appears to be correct. As Marty DeWulf of Bound for Sound pointed out, for some reason the Pass Labs X250 does not seem to mate well with the LC-2.
But on the other hand, the LC-2 mated very well with Marty's Edge NL10 amp. And it certainly mates well with my McCormack DNA-2 Revision A amp. Both of which are equal to or higher powered amps than the X250.
Thus far, the Pass Labs is the only amp I've heard of that does not potentially mate with an LC-2.
-IMO
But on the other hand, the LC-2 mated very well with Marty's Edge NL10 amp. And it certainly mates well with my McCormack DNA-2 Revision A amp. Both of which are equal to or higher powered amps than the X250.
Thus far, the Pass Labs is the only amp I've heard of that does not potentially mate with an LC-2.
-IMO