The speaker cables can also add tot he problem with longer cable runs reducing signal available at the box. So the argument for a powered speaker is strong. A big plus is the consistency of the sound, an MSL-4 in Mumbai will work and sound the same as one in Dallas or Melbourne. The amplifier power supply autosources your mains voltage too. In Use Staging Connections have a contract as preferred supplier of rental equipment like projection and lighting as well, in the Casino - but this doesn't preclude other firms from coming in.
Every show is different too, with the room capable of being configured in many ways.
All of these are self powered. Generally that inventory copes with anything that might happen in the room, including concerts. The CQ's are a full range compact speaker system. This helped swing the choice towards Meyer, but sound was the major factor in the decision. You can drive them really hard and very clean.