I bet we did alright, lining it up by ear. But no, the hard part was...when you're doing A/B type comparisons, you want them to be the same level. Well, if one of them is at 100%, and the other is at 40%, then the one at 40% is at a disadvantage, because it's doing attenuation in the digital domain, which can be good or bad, but is almost always worse than no attenuation in the digital domain, which is what Mr. 100% had. Optimal situation would be both at 100% into a pre that has individual attenuation on the inputs (such as the McIntoshes) into the same amp & drivers, or both into the same model amp & drivers. We'll see what we can come up with, but I'm not going to worry about it too much, I'm just going to listen to (and watch) it(s output).
Hirsch actually couldn't come up with two of the same of anything.