We use them a LOT. Each player has one that the band owns.
It took me about 6 months to get used to them and good sound dialed in(Line 6 Bass PODXTLive). Good sound = sounds good with 50~100 ft. after that it gets wierd sometimes.
Did a LOT of digging myself concerning the functioning of this gear(electrical engineering degree & day gig).
BOSE datasheet says
40~12kHz(-3dB)
32~14kHz(-10dB)
Coverage pattern 160 degrees.
Check your PM.
The PRIMARY reasons for us are:
1) Portable and flexible. You ain't doing a show on the back deck of a yacht with a normal PA.
I was brought into the band as a replacement bassist, BOSE was already here so I HAD TO learn how to make use of it.
On an outdoor deck(drummer gets one for this)
Similar to outdoor gig because of room size
A famous private venue in Houston, the one where they PAINTED over decades of famous autographs on the wall....
Outdoor, everyone has a rig.
2) Reliable, show after show.
3) Again, can fit into small places and do a show.
4) Elimination of FOH, crew, monitors, etc.(a lot of headaches).
5) Clean stage setup, every show.
For your setup, it would be very nice for each player to have their own OR, if you do smaller venues, everyone except the drummer. Using one on each side as a PA is NOT the correct way to be "happy" with these things.
That said, I prefer these rigs:
This one uses the PA's GREAT subs and drum monitors for lows and a Behringer for mids/highs: