As you route the line-level cable, keep it away from other wires and cables. Install the 70-volt amplifier in a secure place such as the shelf in a closet.
Mount the loudspeakers in the ceiling tiles, or if there’s no way to recess them into the ceiling, use surface-mount loudspeakers.
A local volume control is mandatory, but make sure you have configured this system so that the users cannot overdrive it.
I personally would have an equalizer in this signal chain and spend 30 minutes to make it sound good and intelligible. A 2/3-octave (15-band) or better EQ would be smart.
Reply By RLP
We had a similar question with distributed sound – particularly since they wanted sound piped not only to the nurseries and children’s church rooms but also to an entirely separate detached building.
While I was walking through the buildings, thinking about how to address the problem I noticed that every one of the classrooms has a small portable AM/FM/cassette/CD player.
So O solved our distributed sound problems by installing a simple FM micropower stereo transmitter fed from my Aux recording feed off the mixing board.
This transmitter feeds a homemade 87.7MHz dipole antenna (lots of information on how to build these simple transmission antennas on the web) invisibly mounted in the roof above the congregation.
Now, everybody in the classrooms (as well as the entire property) can hear what’s going on in the service, hearing-impaired persons can listen to a high-quality amplified copy of the service using cheap “Walkman-type” FM receivers over unobtrusive headphones, and the system doubles as a 24-hours a day announcement center as we broadcast church greetings, schedules, and announcements for anyone wandering into the parking lot outside.
Keep in mind that there are serious FCC restrictions on how much power you can push out of the antenna (it isn’t much!), and the maximum range is only about 200-300 feet, but it works great for small to medium sized churches that are not spread over 20 acres or so.
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