I just purchased a C-20 to match my F-30s. My receiver doesn't have test tones, so I used the THX optimizer found on my Star Wars DVD. When using the THX pink noise test, the center doesn't sound as bright as the F-30s. (I.e. The higher frequencies sound more pronounced in the F-30s. The C-20 sounds duller.) This isn't what I expected, since the C-20 is supposed to be matched to the F-30s.
Has anyone else run this test on this setup? I'm wondering if my C-20 is defective.