It appears the original install was sourced from a music store. In itself, not a big problem, but it would be better to deal with a sound reinforcement vendor. Although much attention is given to the electronics, the most critical aspects of a sound
system are the microphones and speakers. Think about it this way- The microphones change sound energy to an electrical signal. The speakers change an electrical signal back into sound energy. These "medium" translations are where most of the big errors occur, therefore selection becomes critical. For example, no one ever specs out the "
distortion" that occurs in a
speaker system. Part of that is the value would be all over the place based on the exact signal being supplied. The other part of that is that the numbers would be horrendous! Still, the general rule of thumb applies; you get what you pay for.
Make your equipment selection based on a "real world" test. In this day of buying online, unless you know the exact product you want to buy, this is one application where you want to see and use the equipment first.