Passive correction EQ for full range speaker.

[abbey road d enfer]

We don't have tweeter. Only one speaker used in the box - rs100-8.

Even where ther is only one speaker, the breakup mode of the diaphragm acts as if there were several smaller speakers at some frequencies, so changing the angle creates comb-filtering.

Here is comparison with Tannoy Reveal 502 (attached to this post)

That's a pretty neat response.