PLACEMENT SUGGESTIONS
The basic placement strategy for Churches and meeting rooms
is really quite simple based on two facts...                                      
1- The lower area of the room is absorbed by the furnishings
and people for the most part and,
2- The speakers are always at the front firing to the back of the
room. The side walls can echo between them from the people
but the side walls will only be "grazed" with energy from the
speakers while most of the energy of the sound system will
eventually reach the back wall. Therefore, keep the absorbers
approximately 7 ft. above the finished floor height and space
them from 2 to 4 feet apart on the back wall and 3 to 6 feet
apart on the side walls. This will give some side to side control
but most of the energy will be absorbed when it reaches the
back wall. A few on the platform or stage back wall at
approximately 5 feet above the finished floor height and 2 to 4
feet  apart will help keep monitors from reflecting off the back
platform  wall into the microphones. This will help you to control
feedback problems.
To learn more about acoustics, go on line and get Jay Perdue's
books on acoustics. They are short, sweet, and to the point, and
very inexpensive. One is about Church Acoustics and the other
is about educational acoustics, but they both speak to acoustics
in general and will shed light on any acoustical situation.
One box treats a home theatre or recording studio with a 14' X
20' room. Two boxes treats a room that would be large enough
to seat 25 people, three boxes for a room large enough to seat
50 people, four boxes to treat a room that would seat 100
people, and one box per 50 people after that. Remeber it's
about how many the seating capacity would be not how many
are actually in the room at the time. For more, on this see the
installation and instruction page.
A box contains 8 specially built 2' X 4' x 1" acoustial absorbers,
8 patented "Black Hole Acoustics"tm Mounting Systems, all
necessary mounting hardware, mounting instructions and
placement suggestions for only $840.00 or we will sell a 4 panel
box of acoustical absorbers for $545.00
2" thick absorbers can be purchased for extra low end
absorption as well as  25% more overall absorption for $585.00.­