By the way, nothing I've heard in midrange tonal anomalies when the drivers are new hinted at a 7db variance, but I have heard the apparent rise seem boosted as I moved further from the speaker, in some rooms, further indicating the room can be an exciter. I've also noticed the phenomenon Miklorsmith notes, wherein a burst guitar or piano tone can, as he says, "light up" a specific freqency spike, but for me that too mitigates with extended use.
Phil
Phil