I own them already since 3 years and I'm not disappointed. Certe highs are a bit too present for my taste, and lack some serious. I have two, and I couple with two SW118 subwoofer IV of the same brand.
I have modified a system for any asset, and it's good sound.
Couple with two amps for Interm M500 medium and R300 for acute and as active filter, a Behringer CX3400.
Nevertheless, careful not to cut too low otherwise the treble at high power, medium makes her a rather unpleasant (sizzling).
For my part I use the following settings:
Lower frequency 60-70Hz
High frequency 7 kHz).