Bose | FreeSpace 6 | Bose FreeSpace 3 Loudspeaker Application Note for Sales Engineers

FreeSpace ® 3
Loudspeaker System
Application Note
f or Sales Engineers
The FreeSpace® 3 loudspeaker system is
a top-of-the-line business music system
®
from Bose . This surface-mounted
Virtually Invisible® 200-watt, speaker
system delivers full, lifelike sound with
deep rich bass in background and
foreground applications.
It is modular and easy to expand.
Key Features
System Configurations
Ease of Use
•70V/100V (25W, 50W, 100W, 200W
taps) monaural
•Transformer bypass 3.5 Ohm mono
or 6 Ohm per channel stereo
operation
• No eq card or special controller
Satellites
required
Dimensions: 3.1"H x 3.1"W x 3.2"D
• Wall mount brackets allow easy
(7.9 cmH x 7.9 cmW x 8.1 cmD)
installation and aiming
Weight: 1.75 lb (0.8 kg)
• Built-in transformer allows multiple
Bass Module (w/Bracket)
tap settings and easy adjustment
Dimensions: 14.0"H x 8.7"W x 13.6"D
• Transformer bypass for direct
(35.6
cmH x 22.1 cmW x 34.5 cmD)
coupled operation
Weight: 17.5 lb (7.9 kg)
• Each bass module accepts connection of 2 or 4 satellites
Applications
• Connector panel cover improves
appearance and tamper resistance
Appropriate applications include:
Elegance
• Retail spaces
• Acoustimass speaker technology
• Restaurants/Bars/Pubs
allows the bass module to be
• A/V presentations in conference
located out of sight
and media rooms
• Virtually Invisible satellites that are
•
Salons
unobtrusive and stylish
• Reception areas
• Available in black or white, or may
be painted with latex or oil-based
• Offices
paint
Acoustic Performance
• Lifelike, spacious sound over large
coverage area
• Frequency Range:
50Hz to 16kHz (±3dB)
• Maximum sound pressure in typical
rooms using recommended designs:
Mechanical Specifications
®
Typical dB-SPL Tap
89 - 92
200 W
86 - 89
100 W
83 - 86
50 W
80 - 83
25 W
®
Included in Two Cartons
The Acoustimass®
module and satellite
speaker pair are
packaged as separate
product codes.
(1) Rear connections cover
(1) Acoustimass module
with partial bracket attached
®
Version 3 - 6/21/2001
(1) Wall-mount
bracket section
-1-
(2) Wall-mount brackets
(2) Satellite speakers
FreeSpace ® 3 System Design Guidelines
Satellite
Placement
Satellite Guidlines
• A single Satellite covers a circular
area with a diameter of approximately 25 feet.
• Keep a satellite within 25 feet of any
listener.
• Mount satellites between 10' and 14'
high
• Use a pitch of 10°.
Design Rules
1 Satellites work best when located in
corners
2 When designing systems, start by
adding satellites in the corners.
(Two satellites in adjacent corners
can cover a wall length up to 50 feet.
Design
3 For smaller rooms (under 45' in both
dimensions, but greater than 25' and
a ceiling higher than 10' ) use four
satellites with one Acoustimass bass
module
4 In all other systems use one bass
module for every two satellites
5 For wall lengths greater than 60',
add another satellite for every 25
feet.
6 For wall lengths less than 30 feet,
use two satellites and alternate
satellites on the two longer walls
7 Use even number of satellites.
Bass Module Placement
• For best performance, place the
module more than 10 feet from the
listeners, but never more than 3540 feet away.
• If the module will be less than 10 feet
from the listeners, mount it next to a
satellite.
When Surface Mounting
• For maximum efficiency, try to
boundary-load the bass module
against large hard surfaces.
• Ideal location is in a corner. Second
best location is against hard walls.
• For best coverage, avoid centering
the module along any wall to avoid
acoustic interference.
When Flush Ceiling-Mounting
• For best coverage, avoid centering
modules in the room.
• Mount them 4-5 feet off the center
line.
• Avoid the geometric center of the
ceiling.
Examples
Room Size Typical System
(feet x feet)
satellites & bass
40 x 40 (x12'h)
45 x 45 (x9'h)
40 x 60 (x12'h)
40 x 80 (x13'h)
40 x 100 (x14'h)
60 x 60 (x14'h)
60 x 80 (x10'h)
60 x 100 (x12'h)
4&1
4&2
4&2
6&3
8&4
4&2
6&3
8&4
Example 1A:
Using Surface-Mounted Bass
Modules to Create a Background System for a
40'x40'x11' Room
This room can be designed using
four satellites (small circles below)
mounted at 9 feet in the corners
and pitched at 10°. A single
module (black square) is placed in
one of the four corners. Tapped at
25W, the system will deliver 80-83
dB SPL. Amplifier power of 32W
(=1.25*25W) is recommended for
this system.
40’
40’
Version 3 - 6/21/2001
Example 1B:
Using Flush Ceiling-Mounted
Bass Modules in a Background
System for a 40'x40'x9.5' Room
Like Example 1A, this room requires
four satellites. With a ceiling height
of less than 10 feet, however, it
needs two flush ceiling-mounted
modules (one per two satellites).
They should be mounted asymmetrically, at least 4 feet off the
room center line and at least 20 feet
apart. Tapped at 25W, the system
delivers 80-83 dB SPL. Amplifier
power of 60W is recommended for
this system.
40’
40’
Example 2A:
Using Surface-Mounted Bass
Modules
in a Foreground System for
an 80'x30'x14' Room
This design features four satellites
Examples
mounted
as shown in the figure
above, right. Placed at 13.5 feet,
the satellites are mounted at a 10°
pitch.
-2-
Two surface-mount modules are
installed, jointly with the corner
satellites, in two opposite corners.
Tapped at 100W, the system will
deliver 86-89 dB SPL. Amplifier
power of 400W is recommended for
this system.
30’
80’
Example 2B:
Using Flush Ceiling-Mounted
Bass Modules in a Room Similar to 2A
This design uses the same number
and location of satellites as Example 2A. Two flush ceilingmounted modules are evenly
spaced between walls, but offset
from the center line. Tapped at
100W, the system and will deliver
86-89 dB SPL.
30’
80’
Examples…
Example 3A: Using Surface-Mounted Bass
Modules for a Foreground System in an Lshaped
100'x75'x13' Room
One design option is
exercised using ten
(10) satellites
mounted as shown in
the figure to the right,
at a height of 12.5
feet and a pitched of
10°. This design
requires using five
modules. Tapped at
200 W, this system
delivers 89-92 dBSPL. Amplifier power
of 2000W is recommended for this
system.
Example 3B: Using Flush Ceiling-Mounted Bass
Modules in a Room Like Example 3A
A second option
uses the same
number and
location of
satellites as in
3A and the same
number of bass
modules. But
here the modules are flush
ceiling-mounted
at least 3-4 feet
off the center
line.
100’
100’
75’
75’
Accessories
Amplifiers
The FreeSpace® 3 speaker ceiling
adapter kit allows for suspending the
module above the ceiling, using an
exit grille like the one used with the
Model 8.
Black and white satellite extensions
are also included (shown at the lower
right of the figure) in the kit, to allow
for ceiling mounting the satellites,
too.
This product is available under
product code 026623.
A single FreeSpace 3 system
tapped at 200W requires an
amplifier that can deliver 200W
continuous with (3dB) peaks.
To ensure proper amplification for
a system designed with FreeSpace
3 speakers:
1. Add the wattage taps of the
speakers to calculate the total
number of watts drawn from the
line.
2. The continuous output power
rating greater than the wattage
drawn and capable of handling
peaks of twice the wattage
drawn. Allowing at least 25% of
continuous power headroom is
recommended.
Example
A FreeSpace 3 system tapped at
100W requires an amplifier with at
least 100W of continuous output
power.
Transformer
Allow for 25% headroom in background music systems. A 125W
amplifier is recommended.
For foreground music systems 100% headroom is recommended.
A 200W amplifier should be used.
Version 3 - 6/21/2001
-3-
FreeSpace ® 3 System Wiring Options
Use of Transformer
Press
to to
open
Press
open
each
wire
each
wire
NC
12W
25W
50W
100W
+
The transformer tap setting
from the factory is for 200W
use. To set it for lower
wattage, remove the end
of the ‘+’ jumper wire
connected to 200W and
reattach it to the appropriate tap (100W, 50W
or 25W).
Note: Jumpers required
for 70V/100V operation.
For transformer bypass,
remove jumpers from
transformer settings and
use 4-8Ω input.
TRANSFORMER SETTINGS
SAT 4
SAT 2
SAT 3
COMM
+70V
+100V
100V
70V
COM
SATELLITE
CONNECTIONS
SAT 2
MONO
70V/100V
INPUT___
SAT 1
SAT 1
Refer to installation manual
PN254410 for proper installation
and operation instructions
PA
STEREO
CH 2
4-8Ω
INPUT
MONO
STEREO
USE JUMPERS
CH 1
Connecting an amplifier output to a
single module in a 70 V configuration
Connection jumpers
as factory installed
FreeSpace® 3
Acoustimass Module
Use of Direct Mode (Transformer Bypass)
Note: Jumpers required
for 70V/100V operation.
For transformer bypass,
remove jumpers from
transformer settings and
use 4-8Ω input.
Note: Jumpers required
for 70V/100V operation.
For transformer bypass,
remove jumpers from
transformer settings and
use 4-8Ω input.
NC
12W
50W
+
25W
TRANSFORMER SETTINGS
100W
NC
12W
25W
50W
+
100W
TRANSFORMER SETTINGS
SAT 4
SAT 4
SAT 2
SAT 2
SAT 3
SATELLITE
CONNECTIONS
COMM
+70V
+100V
+70V
COMM
+100V
SAT 3
SATELLITE
CONNECTIONS
SAT 2
MONO
70V/100V
INPUT___
SAT 2
Stereo Source
MONO
70V/100V
INPUT___
SAT 1
SAT 1
L
Refer to installation manual
PN254410 for proper installation
and operation instructions
STEREO
CH 2
R
SAT 1
SAT 1
Refer to installation manual
PN254410 for proper installation
and operation instructions
4-8Ω
INPUT
STEREO
CH 2
4-8Ω
INPUT
MONO
STEREO
USE JUMPERS
CH 1
MONO
STEREO
USE JUMPERS
CH 1
FreeSpace® 3
FreeSpace® 3
Acoustimass Module
Acoustimass Module
Connecting mono
Connecting
a source
mono source
the transformer bypassed
withwiththe
transformer
bypassed
Connecting a stereo source
with the transformer bypassed
Wiring Satellites to the Module (with or without Transformer)
Note: Jumpers required
for 70V/100V operation.
For transformer bypass,
remove jumpers from
transformer settings and
use 4-8Ω input.
Note: Jumpers required
for 70V/100V operation.
For transformer bypass,
remove jumpers from
transformer settings and
use 4-8Ω input.
NC
12W
50W
25W
TRANSFORMER SETTINGS
+
100W
NC
12W
25W
50W
100W
TRANSFORMER SETTINGS
+
Channel 2
in Stereo
SAT 4
SAT 4
SATELLITE
CONNECTIONS
COMM
SAT 3
+100V
COMM
+70V
+100V
SAT 3
SAT 2
Channel 2
in Stereo
+70V
SAT 2
SATELLITE
CONNECTIONS
SAT 2
SAT 2
MONO
70V/100V
INPUT___
MONO
70V/100V
INPUT___
SAT 1
SAT 1
SAT 1
SAT 1
Refer to installation manual
PN254410 for proper installation
and operation instructions
STEREO
CH 2
4-8Ω
INPUT
Channel 1
in Stereo
Refer to installation manual
PN254410 for proper installation
and operation instructions
MONO
STEREO
USE JUMPERS
CH 1
MONO
STEREO
USE JUMPERS
CH 1
FreeSpace® 3
FreeSpace® 3
Acoustimass Module
Acoustimass Module
Using 4 satellite speakers
with direct connections
Using 2 satellite speakers
Version 3 - 6/21/2001
STEREO
CH 2
-4-
4-8Ω
INPUT
Channel 1
in Stereo
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