Interesting! I'm planning to buy one of this Sub8 for me too, to pair with my JBL One Series 104s. Do you felt a better punch and definition in the low-end with the Sub8? Is your room somehow treated?I'm very happy with Topping EX5 -> Presonus Sub8 -> iLoud MTM. My study is roughly 2 x 3m and the listening distance is under 1m (80-90cm).
MTM's are high passed at 80Hz via the Sub8 and sound better for it. It's also a very compact and simple system. The DSP in the MTMs is much more than a gimick for me. The left monitor is 10cm in front of the rear wall and the right one sits infront of a bay window, about 1m away from the glass. So the ability to automatically EQ the monitors individually was very attractive.