Hi,
I have two EAW FR129z (left and right) and I noticed that the left speaker was sounding muffled. I used a RTA mic and saw that the higher frequencies (4kHz and above) where being dropped. I checked my eq settings and nothing had changed.
I replaced the high frequency diaphram of the left speaker and the sound did improve. However, I used the RTA mic again (with eq turned off on my Presonus Studiolive AI mixer) and saw that I still have a dip in the 4kHz area. Could the passive xover in the left speaker be going out? I have attached the screenshots of my RTA mic readings.
I have all attached a photo of where the speakers are located in my church
I could be an issue with a passive xover-if the crossover is doing some eqing (most do not however)
Or it could be any of the following:
1: Placement of the mic during the measurement
2: trash in the voice coil gap of the HF driver
3: trash in the phase plug of the HF driver
4: "something" in the throat of the horn
5: An eq somewhere in the system that you are not aware of. DSPs are famous for "oh I didn't know that was there" type of thing