I can. Kind of. Just bought it a few weeks ago. I couldn't test it extensively so far.
For me it sounds fantastic, it's the first time i say: it's a bit too much!
I planned on a good solid 12" sub , XTZ 12.17 edge was my final consideration, but to to logistics the shipping was far too long for my specific situation.
I came across the ELAC , because i was hunting on a budget, maximum 800 euros.
After i had to abandon the XTZ, this ELAC fit like a glove.
The only problem is that it's kinda big.
It sounds great, goes very low. And it rattles my place !
The app is easy to use, no need to calibrate it, no need to use eq. But the trigger sensibility setting is really nice. It turns on with a lot less signal then my old yamaha ns sw 200 .
And of course i set my crossover from the app, even the volume.
ELAC has a subwoofer line one step above this, that was out of my budget range.
I researched on a few brands. I considered buying used, but the market is rather scarce in my country for premium audio products....