Phantom Gold measurements: a stunning web first!

[ogs]

The overall frequency balance is quite similar to measurements I got from the White Phantoms.
I agree with Gremlin though; your measurements does show Phantom AND room. With some experimentation on placement  you'd be able to sort out the bass issues shown in the measurements.
Is there an option to extract a step response in the OmniMic software?

Again, that's what I want: room + speaker is what I hear, and the input to room correction. I have no interest in some sterile anechoic response, which tells me nothing about how the speaker actually sounds in my listening room. 

Moving speakers by trial and error in a room to fix response anomalies is a 19th century approach: painful, tedious, mostly ineffective in many cases, and largely unnecessary in the modern DSP world of digital bits. What I plan to do is simply insert a digital equalizer (even a relatively cheap one like a Behringer is transparent in the digital domain, and there are much fancier ones like Z-systems), and reduce the large bass hump, and trim the treble a bit. The Behringer 2496, for example, has a mode that automates this. Tools like this are now used in every recording studio in the world. Studio engineers don't move heavy studio speakers around -- they just fix the response in the digital domain. Of course, some room treatment is useful, especially in the treble range.

I've used room correction for many years so I am quite familiar with the effect it has. I could not do without. What I (and probably Gremlin) actually commented was the fact that the measurements you present is Phantoms in your room with your speaker placement and your microphone position.
Acousticians and other sound pros would also use waterfall plots and time domain measurements to decide what needs to be done, not just the amplitude response.

The OmniMic software can apparently not show the step response. REW has this and also my Audiolense XO. It is the impulse response (which the OmniMic sw does show) displayed differently and easier to interpret.