2016 System Update
Software:
I am still using Rephase to build the crossovers, and the combination of Room EQ Wizard and DRCdesigner.
I have moved away from Foobar to Logitech Media Server using the local player plugin. This allows me to integrate Tidal with a remote, and make use of the sox resampler built into local player.
Local player outputs to Reapers Asio driver without issue.
I still use reaper to process the audio and run the crossovers with some minor differences. I am now using Reaverb, the built in convolution engine to run the FIR crossover filters and DRC correction filters. I also found that setting the volume levels for the individual drivers in Reaverb works better than using the setting in the I/O panel, as the level meters are not affected by the setting in the I/O panel, meaning you could potentially be clipping without the meter displaying it.
Hardware:
I have changed the Behringer sound card for a new PC using a Lynx AES16 and an Apogee Rosetta 800. I have also recently built a 10w Mini Aleph amplifier to power the horns. 
Hi
Is it the squeezeplay you use?
How do you deal with overall volume control, from squeezeplayer only by remote.
Br Morten
Yes, squeezeplay/local player. I use the volume on squeeze player, I do plan to build a 6 channel pre amplifier.
I have a similar setup in my test bench. Nice work you got there. . Where do you cross those 10″ inch to the horn?
Br Morten
About 1500hz.
Hi
Can you possible e-mail some snapshots of your reaverb config.
I am confused why you use both rew and drc designer, i thought they were to software with the same goal??
Are you also using reaEq or do you make the crossover in the wav file aswell?
Br Morten
I have sent you an email.