I'll move it outside and see what happens. I dont think its as much of a measurment anomaly as it is a problem with the design of the horn or the need for a notch filter to compensate the drivers. Id rather stay away from an eq for the most part. The horn models out with a peak in that range too. the model isnt peaked as wide as i have, but, the original model was for different drivers and ot the ones used now. Although the original model showed a great plot for a finished speaker. It sounded like shit and was not even able to be listened to.