Bose FreeSpace DS 100SE Guide

DESIGN GUIDE
FreeSpace®DS 100SE
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Overview
This application note covers the basic concepts for
the application of the FreeSpace DS 100SE loud-
speakers in business music systems.
The FreeSpace DS 100SE loudspeakers are ideally
suited to background music, foreground music and
paging applications with mounting heights between
8 and 32ft (2.4 to 10m). The Articulated Array™,
composed of two 2.25 inch drivers, delivers consis-
tent response across the entire 180° coverage area.
The 5.25 inch driver, mounted in a ported enclo-
sure, provides the additional bandwidth required
for today’s foreground music applications. The
FreeSpace DS 100SE loudspeakers are compatible
with 70V, 100V and low impedance amplifiers and
are capable of delivering up to 95 dBSPL in a typical
application with a 15ft (4.8m), mounting height.
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 100 dBSPL.” In either case, the chal-
lenge is to gather the right set of requirements and
convert them into a set of design criteria to use in
creating 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 65 Hz – 16 kHz ± 3 dB
Long Term Power Handling 100 watts continuous
Sensitivity 85 dB-SPL @ 1W/1m (pink noise)
Impedance 70/100V or 8 Ohm
Maximum Acoustic Output 105 dB-SPL @ 1m (pink noise)
111 dB-SPL peak @ 1m (pink noise)
Dispersion 180° x 75° (Horizontal x 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 DS 100SE loudspeakers.
Design Guidelines
When creating a design that uses the FreeSpace DS
100SE loudspeakers, you should consider the following:
•The FreeSpace DS 100SE loudspeakers are ideally
suited to background music, foreground music
and paging applications.
• Recommended mounting height for the FreeSpace
DS 100SE is between 8 and 32ft (2.4 and 10.0m).
• Provide at least 20ft (6.1m) of space between
adjacent loudspeakers for typical applications.
• In outdoor applications do not space the loud-
speakers by more than 50ft (15.2m).
• Generally, the FreeSpace DS 100SE should be
pitched downward between 0° and 15°.
• Maximum SPL for a typical application is between
89 and 98 dBSPL.
• 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 DS 100SE 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 DS 100SE 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®DS 100SE
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 DS 100SE 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®DS 100SE
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 loud-
speaker tap.
2.43.0 3.64.2 4.85.5 6.16.7 7.38.0 10.0
810121416182022242632
12.58988888786858483838280
25 92 91 91 90 89 88 87 86 86 85 83
50 95 94 94 93 92 91 90 89 89 88 86
100 98 97 97 96 95 94 93 92 92 91 89
dB
SPL
Note:
12.5 watt tap is not available for 100V operation.
FreeSpace DS 100SE Tap Chart
m
ft
T
A
P
Mount
Height
Coverage Loudspeaker Spacing Distance
Premium 40ft | 12.0m
Standard 50ft | 15.0m
Minimum 55ft | 17.0m
A. If room is less than 50ft (15m) wide, place one
DS 100SE ½ the Loudspeaker Spacing distance in
from each corner of the room.
Length < 50' | 15m
Width <
40' | 12m
½
Spacing
Loudpeaker
Spacing
B. If the room length exceeds 50ft (15m), install
additional DS 100SE loudspeakers using the
required speaker spacing distance.
Length > 50' | 15m
Width <
40' | 12m
½
Spacing
Loudspeaker
Spacing
OR
Number of Loudspeakers Required Loudspeaker Tap Power Required
x =
Amplifier SizePower Required
=
x 1.25
D. Calculate the required amplifier power: E. Calculate the required amplifier size:
Headroom

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Project Name:___________________________________________________ Contact: ___________________________________ Date:_______________
DESIGN GUIDE
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FreeSpace®DS 100SE
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.
dg_freespace_ds100se_design_guide_v1.0