@lrlacosse "This was done only on the upper and high frequency parts of the crossover. The inductors I wanted to use for the bass part are just too big and an external crossover would be needed. So, yes, probably my own fault for the bump in db in the 4 to 5k range. "
With the crossover mods and part changes, why do you believe you caused a bump in db in 4-5k range? Did you change the specs on parts used or change the crossover point or something?