Yes, I looked into that. The specs (on the Schiit Web site say)
and at the bottom of the specs page is
a link to a test of a sample, with graphs:
From the test report, one can gather quite a bit of information, including two interesting tidbits:
- The steps at each band become larger as one moves further from flat
- The 400 Hz band seems to be centered at 550 Hz
I think the variable step size makes a lot of sense. The center-frequency mismatch at 550 Hz, I don't know what to think of, though I don't think it diminishes usefulness of the device.
Hope that helps!
P.S. Added later: IME, the low Q of EQ with the Loki products means that a small change (such as 0.5 dB) will have more audibility than it would at the same frequency with a higher Q.