i have read through that topic before. it didn't have much negativity about the amp so i took my chances.
Are you operating these amplifiers bridged, stereo, or mono?
Are you using this mostly for DJ / EDM?
Indoors or outdoors?
What largest number of people you are playing to?
Is this a permanent install or portable?
Have you measured the DC resistance of the speakers with an ohmmeter? they should both be about the same and something less then 4 ohms... probably 3 ohms or a little higher.
Have you taken the grill off and verified that the speaker coils are not rubbing by gently pushing in? A scratching noise or of the cone sticks in and does not return easily is a bad sign.