It's probably not the CLRs. It's sound. Sound always depends on the room, spot etc. Happens with traditional guitar cabs too.
Setting up a CLR is simple. Choose the correct DSP setting (one out of 3), sub off, and make sure the signal doesn't clip (keep enough headroom).
There's an alternative way to use CLRs as a backline on the floor. Do NOT select the BL setting, but choose FF instead. Put the CLR down as a wedge monitor (so not on its side), not in front but behind you, and put stuff under its rear to reduce the angle (but keep it at 10 degrees or more).