Bose FreeSpace 360P Series II Guide

DESIGN GUIDE
FreeSpace®360P Series II
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Overview
This application note covers the basic concepts for
the application of the FreeSpace 360P Series II loud-
speaker in business music systems.
The FreeSpace 360P Series II loudspeaker is ide-
ally suited to background and foreground music
in outdoor applications. The unique design of the
FreeSpace 360P-II delivers a full range response
across a 360° area. The FreeSpace 360P-II loudspeak-
er is compatible with 70V and 100V amplifiers, and
is capable of delivering up to 90dBSPL in a typical
application with a 15ft (4.8m), speaker to listener
distance.
All system designs begin with a set of requirements.
The system requirements can be as simple as “it has
to sound great,” or as detailed as “it must have an
output level of 100dBSPL”. In either case the chal-
lenge is to gather the right set of requirements, and
then turn them into a set of design criteria that you
can use to create your design.
The three key requirements that you need to
identify in order to deliver the right business
music sound system are:
Loudness What sound pressure level is required
for this application?
Response What bandwidth is required for the
type of program material that will be used?
CoveRage How consistent must the sound be
across the entire coverage area?
Prod uct Specifications
Frequency Range 70Hz – 15kHz ± 3dB
Long Term Power Handling 80 watts continuous
Sensitivity 87 dB-SPL @ 1W/1m (pink noise)
Impedance N/A
Maximum Acoustic Output 100 dB-SPL @ 1m (pink noise)
Dispersion 360° Horizontal
50° Vertical
Each of these requirements can be easily converted
into a specification that we can use to create our
system design. If we understand the customer’s
needs in these three areas, we can deliver a design
that will, at a minimum, meet their needs, and at
best, exceed their expectations.
For the purposes of this application note we will
assume that you are familiar with the system
requirements for a business music system, and are
ready to focus on the creation of a speaker layout
using the FreeSpace 360P-II loudspeakers.
Design Guidelines
When creating a design that uses the FreeSpace
360 P Series II loudspeakers, you should consider the
following:
• The FreeSpace 360P-II is designed for in or above
ground installation.
• Listeners should always be at least 3ft (1m), away
from the nearest FreeSpace 360P-II.
• Maximum SPL for a typical application is between
85 and 90dBSPL.
• Always add 25% headroom to your amplifier to
accommodate various types of program material.

Design Worksheet
Use the following worksheet to create a design using the FreeSpace 360P Series II loudspeakers.
step 1 Using the graph paper on the last page, create a sketch or drawing of the room.
step 2 Confirm that the FreeSpace 360P Series II loudspeaker will meet your loudness requirement.
A. On the chart below, locate the loudspeaker mounting height for this design.
B. Draw a line down to the desired maximum SPL.
C. Draw a horizontal line across the chart at your desired SPL level.
D. All of the loudspeakers listed below the line will meet your loudness requirement.
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FreeSpace®360P Series II
DESIGN GUIDE
note: If the loudspeaker that meets your
response and loudness requirement does
not meet your mounting needs, select one
that provides more bandwidth, and also
meets your mounting needs.
Vocal Range Full Range Extended Range
DS 16S & SE 203 FreeSpace 3
DS 16F 360P-II
Model 32 DS 100SE Any vocal range loud-
speaker combined with
a FreeSpace 3 bass
module.
Model 32SE DS 100F
102F
step 3 Confirm that the FreeSpace 360P Series II loudspeaker will meet your Response Requirement.
m 2.4 3.0 3.6 4.2 4.8 5.5 6.1 6.7 7.3 8.0 10.0
ft 8 10 12 14 16 18 20 22 24 26 32
DS 16S / SE 90 89 89 88 87 86 85
360P-II 94 93 92 90 89 88 87
FreeSpace 3 96 95 95 94 93
Model 32SE 96 96 95 94 93 92 91 90
DS 100SE 98 97 97 96 95 94 93 92 92 91 89
FreeSpace 203 98 97 97 96 95
DS 16F 99 97 94 91 90 88 87
102F 105 100 98 95 94 92 91 90 89 88
DS 100F 107 103 102 99 98 96 95 94 93 92 89
Model 32 107 103 100 97 96 94 93 92 91 90
dBSPL
Loudspeaker
Mounting
Height
Maximum Continuous Output Level
L O U D S P E A K E R

DESIGN GUIDE
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FreeSpace®360P Series II
step 4 Using your sketch of the room, create a loudspeaker layout using a Loudspeaker Spacing from
the table below that meets your coverage requirement.
step 5 Calculate the required amplifier size. Use the Tap Chart below to determine which loudspeaker tap is
required for this design.
A. Locate the loudspeaker mounting height for this design.
B. Draw a line down to the desired maximum SPL.
C. Draw a horizontal line across the chart to read the required
loudspeaker tap.
m3 4.56
ft 10 15 20
10 87 84 81
20 90 87 84
40 93 90 87
80 96 93 90
Listener
Distance
T
A
P
dBSPL
FreeSpace 360-II Tap Chart
Coverage Loudspeaker Spacing Distance
Premium 10ft | 3.0m
Standard 20ft | 6.0m
Minimum 30ft | 9.0m
A. For large open areas, use a square spacing
pattern.
B. For edges and walkways use a linear spacing
pattern.
OR
Number of Loudspeakers Required Loudspeaker Tap Power Required
x =
D. Calculate the required amplifier power:
Amplifier SizePower Required
=
x 1.25
E. Calculate the required amplifier size:
Headroom
Loudspeaker Spacing
½ Loudspeaker
Spacing
½ Loudspeaker
Spacing
Loudspeaker
Spacing
Loudspeaker Spacing
½ Loudspeaker Spacing
½ Loudspeaker
Spacing

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Project Name:___________________________________________________ Contact: ___________________________________ Date:_______________
DESIGN GUIDE
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FreeSpace®360P Series II
All information subject to change without notice.
©2007 Bose Corporation.
Bose and FreeSpace are registered trademarks of Bose Corporation.
Other marks are the property of their owners.
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