I have two D-Sonic power amps (7 + 5 ch) and I'm very happy with them. I don't feel any kind of distorsion/hiss or hash sound on my JBL speakers with compression drivers.
In order to know the exact module the power amp has in this review... I think Pascal X-Pro modules have only three versions: X-Pro1, mono with 1500w (@ 8ohms), X-Po 2 (two channels, 1500w+400w) and X-Pro 3 (three channels, 1500w+400w+400w, bridgeable as 1500w+800w). So if these unit has 500 (or 800w as D-Sonic says) maybe are talking about another kind of module (maybe a bridged S-Pro)... the pictures shown before are also from mono power amps but with the real X-Pro 1 module, which has 1500w as I said before (also on the list of D-Sonic, known as M3a-1500).
We have to take into account that these modules (with built in SMPS power supply) usually perform better at 240v against the 120v US voltage.
I don’t want to defend this brand too much, but the Pascal modules are well made electronics "Made in Denmark" and many active speakers from Genelec well known for its ultra performing monitors, are powered by Pascal modules...