Issues with OT12 frequency response

[jeffbabcock]

I can confirm the dip as well. I used the Delta Pro 12A and my smaart results looked pretty much exactly like what Ron K posted. The coherence reading in smaart takes a nosedive just above 1K. I would consider it to be a non-EQable event. However that shouldn't be a huge concern for the OP, he has bigger issues contributing to sound quality in my opinion, particularly:

1) used the 3012LF which is not the correct driver
2) used the eminence HF driver which IMHO does not sound very good

[Adam Schaible]

The Eminence 2005 with the DIY horn sounds pretty good to me. Different strokes I suppose.