I see the M2 graph is still just showing the basic on-axis response so we will need to update that to show the Listening Window and Sound Power. What we hear in a room is a combination of the Listening Window and the Sound Power so just showing an on-axis response or the responses out to 45 or 60 degrees off-axis is not enough information. The big change that happened with the introduction of v4 was the concentration on getting the Sound Power curves, as well as the Listening Window curves, to have a nice linear response. The Listening Window should be linear across the frequency band and the Sound Power should be linear but tilting down so it is about 10 dB down at 10k Hz. In an omnidirectional speaker that downward tilt in the Sound Power comes up due to energy being radiated in all directions. In order for the omnidirectional speaker to not sound overly bright due to this extra energy in the Sound Power it is necessary to tilt the Listening Window downwards to compensate. In the LFR1100 Active the Listening Window and Sound Power curves are the same curve and hence the downward tilt of 5 dB to 10k Hz. The bringing together of the Listening Window and Sound Power yielded some amazing results in the blind testing. There is no question we are on to something here.
