I'm intending on using something very similar to the 1.6K crossover with 6db augmentation. This will bring the JBL 2426J/2370A combo down to 104 db across its bandwidth, if I understand correctly that you are attenuating the lower end of the driver response to match the top end making a more linear response. If this is correct I'm planning on matching the cone driven midhorn to this level. My guess was that the midhorn/2123J would be in the 105-106 db range. Not a lot hotter but a little bit, approxiametly a db or two. Should I try it as is or will the midrange shout a bit? Thanks for sending along the plans. Take care! Jerrod