Thank you for your response. Regarding placement of speakers, I don't feel the experience of my current speaker placement would be of much use with the Apollos, but only becuase my current speaker is so very different from all others on the planet. I own Beveridge 2SW speakers, and they must be 6 feet min. from the front wall and actually face each other, not the listener. They produce a 180 degree cylindrical wave front, so just as much in-phase sound is reflected off the front wall as is generated towards the listener. It creates one of the most involving sound fields of any speaker I've ever experienced. The open baffle is similar, except the rear wave is out of phase with the direct sound, and I was curious how far from the front wall would be recommended due to the back wave.
I found the frequency response/horizontal dispersion graphs in the Prometheus review on your website. The legend on the graph was not clear as it appeared on my computer screen, so I couldn't tell how far off axis each curve represented. Clearly, however, the tweeter's horizontal dispersion characteristics are noticeably superior to those of the wide-band driver. Is the elevated response in the 2Khz to 5Khz region inherent in the driver? I could well imagine that being responsible for the impression that the listener is closer to the performers than on other speakers. However, this response characteristic appears to be largely ameliorated once a person moves off axis. I can understand why one might prefer to not toe-in the speaker.
Of greater concern to me (as a source of confusion) was the graph of Acoustic Phase from the same review. I've never seen anything like that. Could you comment on the Yo-Yo appearance of the acoustic phase? I don't know German, so perhaps that chart depicts something entirely different from what I am thinking.
Regards,
Dean Love