Hey Paul: That was FAST! 3 minutes! Thank you very much! I'm thrilled with it.
I'm using the F1-X crossover (low and full range). The SF-2 is in the effect loop of the F1-X. Low goes through EQ channel 1, to the ELF integrator and out to channel 1 of power amp. Ch 1 output goes to the ELF sub (ELF requires a dedicated power amp channel). Full range out of the F1-X goes through EQ ch2 and into power amp Ch2 and out to the Dr. Bass and Eden cabs in parallel (I'm using a 15 in the same chain lately too).
The reason for the EQ is that the ELF sub's natural bass is so much stronger than the bass characteristics of the other cab's. I set the bass EQ on the F1-X at 1 or 2, set the SF-2 filters how I actually want the sound and use the EQ to take a little bass away from the ELF channel and add a little bass to the non-ELF cabs.
I also like to vary how deep I let the non-ELF bass go. If I use the EQ to surpress the non-ELF cabs between 25 and 95hz (the effective range of the ELF), it's a very different sound than when I allow the non-ELF's to duet with the ELF in the low range.
Hope that makes sense.
Bill