I'm using the DSPeaker Anti-Mode Dual Core 2.0 processor and doing additional room measurements using REW.
Initially I started out using it running full range between between my preamp and an active analog 3 way crossover (tri-amped system) but I wasn't pleased with the level of transparency set up this way primarily due to the complexity of my system. A separate power supply helped quite a bit, but in the end, I opted for using the unit for just the subs only. In fairness to DSPeaker, it was designed to work as a stand-alone pre-amp or between your preamp and amp; not like I used it. It's really flexible and does a lot. It's really simple and fast to use. There have been several software updates. The screen resolution is somewhat limited. This is one of the reasons I like REW in addition to the other measurements that it does (waterfall plots, RT-60, group delay, etc). Oh, I had an issue with a software upgrade and the DSPeaker technical support (from Finland!) is just outstanding.