I'm currently using a Behringer DCX crossover with my hybrid ESLs, but I'm considering a Drive Rack.
A friend who I built speakers for is using a Drive Rack PA2 to bi-amp them. The Drive Rack has a wonderful user interface and I really want to get one for myself. The downside is that we couldn't figure out how to get the auto-EQ function to stop changing the crossover frequencies. The Drive Rack's Auto EQ adjusts not only the EQ, but the crossover points also-- and it does it automatically.
We had the system setup for a three way crossover with subs crossing in at 65 Hz to the midbass woofer, and the midbass woofer crossing over to the panel at 265Hz. The problem is that the Drive Rack interprets the electrostat panel as a tweeter (apparently), and when we attempted to use the auto-EQ function, it adjusted the panel's crossover frequency all the way up to 2,700Hz!
So; my question is:
Is there a way to lock in the crossover points so that auto-EQ leaves them where we set them?
Seriously, it's best to do REW runs, and manually adjust the parametric EQ's, then re-measure. Auto-EQ is going to be confused by the dipole nature with all those delayed reflections and comb-filtering, it might over/under shoot targets.
With AudioArchitect software and Venue360, you might also be able to define a 'speaker' with pre-set XO values, and Auto-EQ might respect that.
I think the PA is too focused on it's DJ/PA role to be an effective permanent speaker processor. It can be made to work, but has quirks, as you are finding out.
In my 15+ years using DriveRacks, I have gotten to love them more and more. They are built like tanks, and the firmware is rock-stable. My 4800 is now 13 years old, stays on 24/7, and is functionally perfect. Never needs a reboot (like the DCX did).
So I recommend you you look at the Venue360, and use AudioArchitect software, there is even a nice used one for $400 on ProAudio Star right now,
Update: I've purchased a DBX Venu 360 and spent most of the weekend tweaking on my system. And it was quite easy to lock-out the crossover points from the auto-EQ. My system now sounds better than ever and I'm loving the Venu 360. I got the 360, and not the PA2, only because the 360 has a digital input, which I am using. This thing is fantastic!
I had been tri-amp'ing my system with a Behringer DEQ2496 EQ in tandem with a DCX2496. The Venu 360 replaced both of these.
Behringers get a bad rap but both of mine were dead quiet and worked perfectly for many years. However; I was never able to use their computer interface because their outdated serial ports wouldn't connect to my laptop, and using the front panel interfaces was downright tedious and clunky compared to the marvelous interface on the DBX, which I control in real time from the sofa using an Ipad.