The sound quality is fourth on my list of important things when considering a sound system DESIGN.
To break this process down:
First is the coverage needed. It does not matter how good it sounds if everybody can't hear it-or it sprays to much sound on the walls.
This is by far the most important. If the coverage is not at least somewhat even and uniform, you're wasting time and money. Identifying the possible speaker locations (with consideration of mounting options) along with the coverage needs will significantly narrow down the acceptable loudspeaker choices to those that match the needs. If a significant amount of primary sound is hitting where it's not needed (walls, ceiling, stage) then the coverage is NOT GOOD no matter how it sounds in the audience. Because it won't sound good in the audience.
Next it has to be loud enough. It does not matter how good it sounds if it is not loud enough for the job.
Again, this will be a process of elimination. You will start with a list of speakers that provide the necessary coverage, and winnow out the ones that aren't enough rig for the gig. (Keep in mind that to this point, there is no such thing as
too much rig for the gig. OK, so a 50kW line array might be overkill in a 100-seat century old wood chapel, but it's probably going to be out of the budget as well.)
Next would be price. It does not matter what a loudspeaker sounds like if it does not fit in the budget.
By now the list will be pretty short. Answering this third point -- which of the list fits in our budget -- will more or less isolate it down to one or two or three systems.
THEN we start with sound quality-now that we have defined the coverage-spl and price limitations.
Time for auditions. Every speaker can be made to sound good given the right environment and tuning. Which one sounds the best in
your room?
If none of them are satisfactory, it's time to revisit the budget and audition a few more.
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Going back to the budget thing. You might find that the best options are nowhere near what your budget allows. I can guarantee this: if you sacrifice any of these points for the sake of the budget, you and your congregation will not be happy with the result. And that is not wise stewardship of the funds that God has entrusted you with, because He is not glorified. If you need more money, ask. It's amazing how people will open their wallets when the need is made known and they know exactly what the money is being spent on and why what you've chosen is the best option. Nobody likes donating to vague causes and vaporware.