FreeSpace® DXA 2120 Digital Mixer/Amplifier
Owner’s Guide
Safety Information
Please read this owner’s guide
Please take the time to follow the instructions in this owner’s guide carefully. It will help you set up and operate
your system properly and enjoy all of its advanced features. Please save this owner’s guide for future reference.
WARNING: T
WARNING:
o reduce the risk of fire or electrical shock, do not expose the product to rain or moisture.
The apparatus shall not be exposed to dripping or splashing, and objects filled with liquids, such as vases,
shall not be placed on the apparatus. As with any electronic products, use care not to spill liquids into any part of the
system. Liquids can cause a failure and/or a fire hazard.
The lightning flash with arrowhead symbol within an equilateral triangle alerts the user to the presence of
uninsulated, dangerous voltage within the system enclosure that may be of sufficient magnitude to
constitute a risk of electrical shock.
The exclamation point within an equilateral triangle, as marked on the system, is intended to alert the
user to the presence of important operating and maintenance instructions in this owner’s guide.
WARNING: No naked flame sources, such as lighted candles, should be placed on the apparatus.
CAUTION: Make no modification to the system or accessories. Unauthorized alterations may compromise safety,
regulatory compliance, and system performance.
CAUTION: This product shall be connected to a mains socket outlet with a protective earthing connection.
This product conforms to the EMC Directive 89/336/EEC and to the Low Voltage
Directive 73/23/EEC. The complete Declaration of Conformity can be found on
www.Bose.com/static/compliance/index.html.
Note: Where the mains plug or appliance coupler is used as the disconnect device, such disconnect device shall
remain readily operable.
Note: The product must be used indoors. It is neither designed nor tested for use outdoors, in recreation vehicles, or
on boats.
Note: Provide an earth connection before the main plug is connected to the mains.
Safety Information
Important safety instructions
1. Read these instructions.
2. Keep these instructions – for future reference.
3. Heed all warnings – on the product and in the owner’s guide.
4. Follow all instructions.
5. Do not use this apparatus near water or moisture.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions – To ensure reliable opera
tion of the product and to protect it from overheating, put the product in a position and location that will not interfere with its proper
ventilation.
8. Do not install near any heat sources, such as radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9. Do not defeat the safety purpose of the polarized or groundingtype plug. A polarized plug has two blades with one wider than
the other. A grounding-type plug has two blades and a third
grounding prong. The wider blade or third prong are provided
for your safety. If the provided plug does not fit in your outlet,
consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where
they exit from the apparatus.
11. Only use attachments/accessories specified by the
manufacturer.
12. Use only with the cart, stand, tripod, bracket, or
table specified by the manufacturer or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time – to prevent
damage to this product.
14. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way
such as power-supply cord or plug is damaged; liquid has been
spilled or objects have fallen into the apparatus; the apparatus
has been exposed to rain or moisture, does not operate nor
mally, or has been dropped – Do not attempt to service this prod-
uct yourself. Opening or removing covers may expose you to
dangerous voltages or other hazards. Please call Bose to be referred
to an authorized service center near you.
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15. To prevent risk of fire or electric shock, avoid overloading wall
outlets, extension cords, or integral convenience receptacles.
16. Do not let objects or liquids enter the product – as they may
touch dangerous voltage points or short-out parts that could result
in a fire or electric shock.
17. See product enclosure for safety related markings.
18. No naked flame sources, such as lighted candles, should be
placed on the apparatus.
Information about products that generate electrical noise
If applicable, this equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15
of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installa
tion. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio commu
nications. However, this is no guarantee that interference will not
occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, you are encour
aged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a different circuit than
the one to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
Note: Unauthorized modification of this product could void the
user’s authority to operate this equipment.
This product complies with the Canadian ICES-003 Class A
specifications.
The information furnished in this user’s guide does not include
all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise
during installation, operation, or maintenance.
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Contents
1.0 Introduction .............................................. 5
1.1 The Bose® FreeSpace® DXA 2120
Digital Mixer/Amplifier ...........................................5
1.2 Supplied with the product ....................................5
1.3 Mixer/Amplifier accessories .................................5
2.0 Hardware Description .............................. 6
2.1 Front panel with open compartment ....................6
2.1.1 System Controls ..........................................6
2.1.2 Control Compartment ..................................6
2.1.3 Input Controls ..............................................6
2.2 Front panel with compartment closed ..................6
2.3 Rear panel ............................................................7
2.3.1 Audio source inputs .....................................7
2.3.2 Outputs ........................................................7
2.3.3 Control input ................................................7
2.3.4 Power ...........................................................7
2.3.5 Communication ...........................................7
3.0 Operation Mode Options ......................... 8
3.1 Operation mode options .......................................8
3.1.1 Mixer Mode ..................................................8
3.1.2 Stereo Select Mode .....................................9
3.1.3 Dual Mono Select Mode ..............................9
4.0 Hardware Installation ............................. 10
4.1 Introduction ........................................................10
4.2 Included accessories ..........................................10
4.3 Placement guidelines .........................................10
4.4 Shelf mounting the chassis ................................10
4.5 Rack mounting the chassis ................................10
4.6 User interface (accessory) ..................................11
4.6.1 User interface installation ..........................11
4.6.1.1 Additional equipment
required (not supplied) ...............................11
4.6.1.2 Assembly .......................................11
4.6.1.3 Recommended cable lengths ........11
4.6.1.4 User interface connections ............ 11
4.6.1.5 User interface wiring ......................12
4.6.1.6 Detailed schematics of
user interfaces ...........................................12
4.7 System wiring ..................................................... 12
4.7.1 LINE 1-4 source inputs .............................. 12
4.7.1.1 RCA connections .......................... 12
4.7.1.2 Euroblock connections .................. 13
4.7.2 DIRECT source input ................................. 13
4.7.3 PAGE source input .................................... 14
4.7.4 OUTPUT connections ............................... 14
4.7.5 AUX output connection ............................. 15
4.8 AC POWER connection ..................................... 15
4.8.1 Input voltage setting (120 or 220-240V) .... 15
4.8.2 Fuse type ................................................... 15
4.8.3 AC POWER connection ............................. 15
4.9 DC POWER connection ..................................... 15
5.0 System Setup ..........................................16
5.1 System setup introduction ................................. 16
5.2 System setup procedure .................................... 16
5.2.1 Selecting an operation mode .................... 16
5.2.2 Setting the options for that mode ............. 16
5.3 Mixer Mode settings .......................................... 17
5.4 Stereo Select Mode settings .............................. 22
5.5 Dual Mono Select Mode settings ....................... 26
5.6 Overview of Utility Mode settings ...................... 30
6.0 User Interfaces ........................................31
6.1 User interface use .............................................. 31
6.1.1 Mode user interface requirements ............ 31
6.1.1.1 Mixer Mode user interface
application ................................................. 31
6.1.1.2 Stereo Select Mode
user interface application .......................... 31
6.1.1.3 Dual Mono Select Mode
user interface application .......................... 31
7.0 Troubleshooting Table ...........................32
7.1 Technical assistance .......................................... 32
8.0 Reference ................................................33
8.1 Factory Default Settings ..................................... 33
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1.0 Introduction
1.1 The Bose® FreeSpace® DXA 2120 Digital Mixer/Amplifier
The Bose® FreeSpace® DXA 2120 Digital Mixer/Amplifier
integrates digital signal processing with two powered output
channels. Designed as a mixer or router for business music
applications, it features an LCD panel and controls behind the
front cover for easy access.
The mixer/amplifier provides six inputs, including four Mic/Line
inputs, one Page input, and one Direct input. The Direct input
overrides all sources playing on the output channels. Each Mic/
Line input provides both RCA and Euroblock jacks.
Two output channels are wired for 120 watts at 4 ohms each. For
70/100 volt applications, a jumper is required for proper configuration. In 70/100V applications, the two outputs will operate at
100 watts per channel. A third output is available for an auxiliary
line out.
Additional features include:
• Signal Mixing: In Mixer Mode, simultaneously combines up to
four inputs for any of the three outputs.
• Signal Routing: In Dual Mono Select Mode, one or two inputs
go to each of two outputs in different zones and can be
remotely selected. In Stereo Select Mode, two stereo sources
go to one output zone and can be remotely selected.
• Opti-voice® Paging: Provides a smooth transition between
music and page signals.
• Dynamic Equalization: Maintains tonal balance at all listening
levels.
• Bose Loudspeaker EQs: Provide equalization for Bose
loudspeakers.
• AGC (Automatic Gain Control): When enabled, automatically
compensates for low-level sources (i.e., microphone with low
sensitivity).
• Room Equalization: Allows easy adjustment of tonal balance
in each zone.
• Communications Port: Includes an RS-232 serial port
reserved for system updates.
• Backup power: Provides an input terminal for a +24V DC
backup power source.
1.2 Supplied with the product
Included connectors:
• 3-terminal input connectors: (4) for wiring source equipment
to the four Mic/Line input Euroblock jacks.
• 4-terminal input connectors: (2) for wiring to the Page and
Direct input jacks.
• 6-terminal input connector: (1) for wiring user interfaces to
the Remote input jack.
• 5-terminal output connectors: (2) for wiring to the loudspeakers.
• 3-terminal output connector: (1) for wiring to the AUX output
jack.
Included placement aids:
• Non-skid rubber feet: (4) for stable placement on a solid, level
surface.
• Rack ears: (2) with mounting hardware for installation in a
rack.
1.3 Mixer/Amplifier accessories
Application-specific Bose accessories:
•Bose® Volume Control User Interface
A user interface with a volume control knob that fits into a
standard U.S. double-gang junction box.
•Bose® Volume Control with A/B Select User Interface
A user interface that fits into a standard U.S. double-gang
junction box. It features volume control and A/B select knobs
for remote source selection.
5 of 36
2.0 Hardware Description
2.1 Front panel with open compartment
1
2
5
6
7
2.1.1 System Controls
1 LCD panel – Displays menu selections for configuring and
viewing system settings.
2 Directional buttons – Navigates system menus and setting
options shown on the LCD.
3 SELECT button – Confirms selections and settings in the
system menus.
4 POWER LED – Blue light indicates the system is on. No
light when unit is off.
5 SIGNAL and CLIP LEDs – Shows signal states for
OUTPUT 1, OUTPUT 2, PAGE, and DIRECT.
Signal Unlit = No signal Clip Unlit = No clipping
Signal Green = Signal present Clip Red = Clipping
3
4
9
10
8
6 GAIN knobs – Adjusts gain for OUTPUT 1, OUTPUT 2, and
PAG E.
7 BASS and TREBLE knobs – Adjusts tonal balance for
OUTPUT 1 and OUTPUT 2.
2.1.2 Control Compartment
8 Enclosure door – Conceals system controls.
2.1.3 Input Controls
9 SIGNAL and CLIP LEDs – Shows signal states for
Inputs 1-4.
Signal Unlit = No signal Clip Unlit = No clipping
Signal Green = Signal present Clip Red = Clipping
10 Gain knobs – Adjusts gain for INPUT 1- INPUT 4.
2.2 Front panel with compartment closed
1
1
Door – Provides access to system controls.
2
6 of 36
2
Power status window – Reveals Power LED.
2.3 Rear panel
2.0 Hardware Description
1
2
3
4
5
14
2.3.1 Audio source inputs
1 LINE INPUTS – Two unbalanced RCA audio jacks per input
(summed to mono).
2 MIC/LINE INPUTS – Balanced Euroblock input jacks. One
per input.
3 MIC/LINE switch – Adjusts for the proper signal level being
used with the four Euroblock input connectors.
(Mic connections require using the Euroblock input jacks.)
4 DIRECT INPUT – Balanced override input jack.
5PAGE INPUT – Balanced audio input jack.
2.3.2 Outputs
6 AUX OUTPUT – Line-level signal output for other amplified
equipment.
7OUTPUTS 1 and 2 – Speaker connections for two powered
outputs (70V, 100V, or 4 ohms operation).
6
8
7
9 10
13
12
2.3.4 Power
9 BACKUP POWER – For connection to backup power
source.
10 POWER OFF/ON – AC power switch.
11 FUSE – 120V T6.3AL/250V or 220-240V T3.15AL/250V.
12 AC mains line cord jack – AC line voltage input.
13 120V/220-240V switch – Switches between 120V and
220-240V AC input voltage. This switch is not provided on
100V AC input voltage models.
2.3.5 Communication
14 COM – RS-232 serial port is reserved for system updates.
11
2.3.3 Control input
8 REMOTE – Input jack for volume-only control and volume
control with A/B select user interfaces.
7 of 36
3.0 Operation Mode Options
3.1 Operation mode options
Before making connections, decide how you want the sound
sources distributed throughout the site. This depends on whether
the area is specified for one or two zones, the kind of coverage
needed, and the sources to be used.
The mixer/amplifier provides three different modes of operation.
•Mixer Mode
In Mixer Mode, the system can mix up to four mic/line inputs to
each of the two output channels for use in one or two zones.
•Stereo Select Mode
In Stereo Select Mode, with up to two stereo sources
connected and using both output channels, the system
provides stereo sound to a single output zone. Refer to “Stereo
Select Mode” on page 9.
• Dual Mono Select Mode
In Dual Mono Select Mode, with up to two input sources
connected to each of the two output channels, the system
provides audio in two zones. Refer to “Dual Mono Select
Mode” on page 9.
3.1.1 Mixer Mode
Line-level sources can be connected using the RCA jacks or
Euroblock connectors. The system sums the two RCA jacks for
each input to mono.
Microphones must be connected using the Euroblock connectors. Make sure the MIC/LINE switch is set to MIC.
Mixer mode sources can be routed to either or both outputs, as
shown below.
Sources can be independently routed to the auxiliary output.
In normal operation, the OUTPUT 1 and 2 gain controls are used
to control the gains of OUTPUT 1 and 2, respectively. In this
mode, you have the MASTERVOL LINKED option, which allows
you to configure the OUTPUT 1 gain control to control the gains
of OUTPUT 1 and 2 simultaneously.
Note: With use of a user interface, the chassis output gain knob is
disabled.
Use of one or two volume control user interfaces is optional. For
further detail, see
page 31.
“Mode user interface requirements” on
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3.0 Operation Mode Options
3.1.2 Stereo Select Mode
Line-level sources can be connected using RCA jacks or
Euroblock
use either the left or right RCA jack of each INPUT.
Stereo Select Mode source routing is fixed, as shown below.
Auxiliary output can be set up to:
• Play constant audio from Inputs 1 + 2 (summed to mono),
Source 1.
• Play constant audio from Inputs 3 + 4 (summed to mono),
Source 2.
• Track source selected using A/B select on user interface.
This mode supports the use of one user interface in a single zone
using the volume control with A/B select user interface.
Note: With use of a user interface, the chassis output gain knob is
disabled.
For further detail, see “Mode user interface requirements” on
page 31.
connectors. To connect a stereo source to RCA jacks,
3.1.3 Dual Mono Select Mode
Line-level sources can be connected using RCA jacks or
Euroblock
each input to mono.
Dual Mono Select Mode source routing is fixed, as shown below.
Auxiliary output can be set up to track Output 1 or constant audio
from Input 1.
This mode supports the use of one user interface for each output
channel using a volume control with A/B select user interface.
Note: With use of a user interface, the chassis output gain knob is
disabled.
For further detail, see “Mode user interface requirements” on
page 31.
connectors. The system sums the two RCA jacks for
9 of 36
4.0 Hardware Installation
4.1 Introduction
This section provides instructions for installing and wiring the
Bose FreeSpace
®
DXA 2120 Digital Mixer/Amplifier.
4.2 Included accessories
• 3-terminal input connectors (4) – For wiring
equipment to the MIC/LINE INPUT Euroblock
jacks.
• 4-terminal input connectors (2) – For wiring
equipment to the single PAGE IN P U T and
single DIRECT INPUT jacks.
• 6-terminal input connector (1) – For wiring
to the REMOTE jack.
• 5-terminal output connectors (2) with
screw caps – For wiring
OUTPUT 1 and OUTPUT 2.
• 3-terminal output connector (1) – For wiring to
the AUX OUTPUT jack.
• Rubber feet (4) – For installing the chassis on a
level surface.
• Rack ears
with
mounting
hardware (2) –
For installing the
mixer/amplifier
chassis (2U) in a
rack.
speakers to
Rack ears
(6) #8-32 x 1/2 in
CAUTION: Do not allow the chassis to exceed the maximum
operating temperature of 50° C (122° F). Be aware of conditions in
an enclosed rack that may increase the temperature above roomambient conditions.
4.4 Shelf mounting the chassis
The Bose® FreeSpace® DXA 2120 Digital Mixer/Amplifier has
rubber feet for use when positioning the chassis on a shelf or
counter top. They help to protect the surface that supports the
unit and to prevent chassis movement. Be sure to follow the
“Placement guidelines” previously described when choosing a
location for the unit.
1. Place the mixer/amplifier upside-down on a solid, level
surface on a protective covering to avoid scratching the
top of the chassis.
2. Insert the supplied rubber feet to the four existing holes on
the bottom of the chassis. Use a screwdriver to push the
locking pins fully into the chassis, securing the feet.
Note: The rubber feet may be removed by inserting a screwdriver into
the screw and turning counterclockwise until the screw backs out of the
hole.
4.5 Rack-mounting the chassis
The chassis requires two 1.75" (4.4 cm) rack-space units with a
16" (40.6 cm) inside depth (including the rear supports).
1. Use the supplied rack ears and hardware for attachment to
the chassis.
2. To secure the chassis to the rack, use four screws with
washers (not provided) to prevent marring the front panel.
Note: Neoprene rubber washers are a good choice because they grip
the screw head and prevent the screws from backing out from vibration
or during transportation.
4.3 Placement guidelines
For placement of the mixer/amplifier chassis, keep the following
in mind:
• Make sure that air can circulate freely behind, beside, and
above the chassis for adequate ventilation. There are intake
vents on the sides and an exhaust vent on the back of the unit.
Do not cover or block the vents.
• Make sure the chassis is protected from heat and kept away
from direct heat sources, such as heating vents and radiators.
Attaching rack ears
to the chassis
Mounting the chassis
in the rack
(rack screws and
washers not provided)
CAUTION: To transport the rack-mounted chassis, be sure
the rear of the chassis is supported mechanically in the rack.
Install a shelf under the unit or use brackets for rear support.
Lack of proper support may result in damage to the chassis.
10 of 36
4.0 Hardware Installation
4.6 User interface (accessory)
The FreeSpace® DXA 2120 Digital Mixer/Amplifier is designed to
be compatible with the following Bose
•Bose® Volume Control User Interface (PC 041966)
•Bose® Volume Control with A/B Select User Interface
(PC 041967)
4.6.1 User interface installation
Volume control with A/B select user interface
Volume control user interface
4.6.1.1 Additional equipment required (not supplied)
®
user interfaces:
4.6.1.3 Recommended cable lengths
For one user interface
Chassis
2000 ft (610 m) max.
22-24 AWG or 0.34-0.25mm
2
gauge cable
For two user interfaces
Chassis
2000 ft (610 m) max.
22-24 AWG or 0.34-0.25mm
2
gauge cable
4.6.1.4 User interface connections
Connect the user interface wires to the appropriate terminals on
the 6-pin connector, and insert it into the REMOTE jack.
CAUTION: Use only 22-24 AWG or 0.34-0.25mm2 gauge
cable to connect the user interface to the mixer/amplifier
.
Rear connection panel
Double-gang electrical box
Cable*
*For the volume control user interface, use a single twisted pair of
data-grade cable (22-24 AWG or 0.34-0.25mm
2
).
*For the volume control with A/B select user interface, use two
twisted pairs of data-grade cable (22-24 AWG or 0.34-0.25mm
4.6.1.2 Assembly
User interface jack with Euroblock connector
See section 4.6.1.5 for wiring diagrams.
2
).
11 of 36
4.0 Hardware Installation
T
4.6.1.5 User interface wiring
User interface connector
One volume control user interface
Two volume control user interfaces
One volume control with A/B select user interface
6-terminal input connector
mounts to REMOTE jack
on the chassis
Schematic for volume control
with A/B select user interface
4.7 System wiring
Input and Output wiring information and illustrations are provided
on pages that follow.
WARNING: Be sure the mixer/amplifier is disconnected from
the AC (mains) power before making any connections.
Two volume control with A/B select user interfaces
4.6.1.6 Detailed schematics of user interfaces
Schematic for volume control user interface
4.7.1 LINE 1-4 source inputs
There are two sets of line input jacks for use with varied connector types.
4.7.1.1 RCA connections
Audio sources can be connected to the LINE INPUT 1-4 RCA
jacks using one of the following cable types:
Source Connector
S
T
RCA
XLR
Phone
Plug
(Balanced)
Phone
Plug
(Unbalanced)
12
3
T R S
TS
S
T
1
3
2
LINE IN
S
T
S
T
S
S
S
S
T
T
T
12 of 36
4.0 Hardware Installation
4.7.1.2 Euroblock connections
A microphone or other balanced audio source can be connected
to the MIC/LINE INPUT 1-4 Euroblock terminals input using one
of the following cable types.
Source Connector
RCA
XLR
Phone
Plug
(Balanced)
S
T
12
3
T R S
MIC/LINE IN
T
S
2
3
1
T
R
S
4.7.2 DIRECT source input
A microphone or other audio source can connect to the DIRECT
INPUT jack using one of the following cable types.
The control input requires a normally open switch.
Source Connector
RCA
XLR
Phone
Plug
(Balanced)
S
T
12
3
T R S
DIRECT IN
T
S
TRIG
2
3
1
TRIG
T
R
S
TRIG
TS
Phone
Plug
(Unbalanced)
T
TS
S
Phone
Plug
(Unbalanced)
Normally
Open Switch
(latching)
T
S
TRIG
TRIG
13 of 36
4.0 Hardware Installation
4.7.3 PAGE source input
A microphone or another paging source can be connected to the
PAGE INPUT jack using one of the following cable types.
T
RCA
XLR
Phone
Plug
(Balanced)
Phone
Plug
(Unbalanced)
S
T
12
3
T R S
TS
S
PTT
2
3
1
PTT
T
R
S
PTT
T
S
PTT
Follow the diagram below to insert the 5-terminal connector into
the output jacks on the back of the mixer/amplifier.
Notice the proper wiring for 4 ohm, 70 volt or 100 volt uses. Both
70V and 100V wiring require the use of a jumper cable, as shown.
Note: Use 12 AWG (4 mm2) to 20 AWG (0.5 mm2) gauge wire for the
jumper.
Rear connection panel
OUTPUT 2
OUTPUT 1
Input voltage switch
Normally
Open Switch
(latching)
PTT
4.7.4 OUTPUT connections
Use the supplied 5-terminal connectors for wiring loudspeakers
to the output jacks on the rear of the mixer/amplifier.
Screw terminal caps
Insert the speaker wire into the proper terminals for the type of
voltage needed, as shown in the figure on the right.
Tighten the screws to hold the wires in place, and insert the screw
terminal caps to cover each screw. These caps prevent making
contact with the screws, which could cause an electrical shock.
WARNING: Terminals marked with are hazardous live. The
external wiring connected to these terminals should be installed by
an instructed person.
WARNING: Terminals marked with should be connected
to the loudspeakers such that the metal parts of its terminal are
inaccessible.
5-terminal connector
OUTPUT 1 and OUTPUT 2
4 Ohm wiring
70 Volt wiring
100 Volt wiring
14 of 36
4.0 Hardware Installation
4.7.5 AUX output connection
The signal and any applied processing from any of the four inputs
can be output using the line-level AUX OUTPUT jack. This output
can feed into another amplifier or other equipment used in the
installation.
Connector
RCA
XLR
Phone
Plug
(Balanced)
S
T
12
3
T R S
AUX OUT
T
S
2
3
1
T
R
S
4.8 AC POWER connection
4.8.1 Input voltage setting (120 or 220-240V)
The rear connection panel of the mixer/amplifier chassis
provides an input voltage switch for 120V or 220-240V use.
An input voltage switch is not provided on the 100V version.
Change the setting only as needed.
Check the switch setting to be sure it is appropriate for the local
power standard.
Set for 120V
WARNING: Be sure to disconnect the mixer/amplifier chassis
from AC power before changing the input voltage setting on the rear
connection panel.
4.8.2 Fuse type
Be sure the proper supplied fuse is inserted in the fuse box.
Replace the fuse as needed with the proper type. 120V units
require a T6.3AL/250V fuse. 220V-240V units require a T3.15AL/
250V fuse.
4.8.3 AC POWER connection
Insert the proper power cord for the voltage used in your region.
Set for 220-240V
TS
Phone
Plug
(Unbalanced)
T
S
4.9 DC POWER connection
This unit allows for +24V DC battery backup power in case there
is a mains power failure. There will be a noticeable reduction in
output due to the limited power of this backup power source.
15 of 36
5.0 System Setup
5.1 System setup introduction
This section provides instructions on adjusting system settings
for preferred operation. To make these settings, the system must
be connected to power and the POWER switch set to ON.
Rear connection panel
POWER switch
AC power cord
jack
Front control panel
POWER
LED
Note: When the system is unplugged, or if a power loss occurs,
these system settings are retained in flash memory. However,
continuous system operation during a power loss requires the use
of an optional backup power source.
5.2 System setup procedure
When the unit is on, the POWER LED lights. Opening the front
control compartment gives you access to the LCD and control
buttons. The LCD displays the product model name at startup.
Front control compartment
5.2.1 Selecting an operation mode
The setting menus available depend on the mode of operation
you choose. Use the right arrow button to enter the mode menu.
Then use the up or down arrows to select the mode you want.
Choose from:
• Mixer Mode: The system can mix up to four mic/line inputs to
each of the two output channels for use in one or two zones.
• Stereo Select Mode: With up to two stereo sources
connected and using both output channels, the system
provides stereo sound to a single output zone.
• Dual Mono Select Mode: With two input sources connected
to each of the two output channels, the system provides audio
in two zones.
• Utility: Includes system lockout, an option to restore all
settings
and EQ versions.
To confirm your selection, press the SELECT button. An
asterisk (*) appears to the left of the selection made.
to the factory defaults, and the ability to view firmware
5.2.2 Setting the options for that mode
There are several ways to change settings and particular buttons
to use for each type of setting. Such as:
• To adjust Input Vol Lvl, use the knobs on the
mixer/amplifier front panel only.
is set appears in the menu field, but cannot be
changed in the menu.
• For Output Vol Lvl , adjust the gain knobs for
output, located in the front control compartment.
• For Output Bass Lvl and Output Treb Lvl, turn the
gain screws for bass and treble, located in the front
control compartment.
The level that
SELECT button
Arrow buttons
• If the system is locked, simultaneously press the left and right
arrow buttons and hold for five seconds. Lockout Off appears.
• When the system is unlocked, you can navigate to system
setup options.
• Use the SELECT button to activate a menu
option and to confirm a new setting.
• Use the arrow buttons to the right of the LCD
to move forward, back, up, and down through
menus.
• For Page Vol Lvl, use the PAGE GAIN knob, located
in the front control compartment.
• To change Adj menu fields:
1. Activate the field by pressing SELECT.
2. Use the up or down arrow to adjust the value.
3. Press SELECT to confirm the setting and move on.
Note: After a 45 second pause (with no activity), the system
resets to the initial menu for the chosen mode.
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5.0 System Setup
5.3 Mixer Mode settings
Here is an overview of common steps to follow in setting up the
Mixer Mode:
A. Choose this mode.
B. Set up inputs.
C. Set up outputs.
D. Choose EQ settings.
E. Set up Page Input, if applicable.
F. Set up Direct Input, if applicable.
G. Set up Master Volume, if applicable.
Setup menus unfold as you move right to the options provided,
as shown.
A
Choose Mixer Mode
5.3.1 A reminder: the settings process
• For various adjustments (designated by Adj) use these steps:
1. Press SELECT to activate the Adj field.
2. Using the up or down arrow, adjust the value.
3. Press SELECT to confirm the setting and move on.
• For level changes (designated by Lvl), use front panel controls
as shown.
• To change Input Vol Lvl, use:
• To change Output Vol Lvl, use:
• To change Output Bass Lvl and Output
• To change Page Vol Lvl, use:
Tre b Lv l , use a screwdriver to turn:
Press SELECT ( ) to confirm the mode selection.
An asterisk (*) marks the selection made.
B
next page
C
next page
D
page 19
E
page 20
F
page 21
G
page 21
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B
Mixer Input Set-up
• For Input Vol Lvl
• For Input Bass Adj and Input Treb Adj
Adjust the value to +/-6 dB in increments of .5 dB.
5.0 System Setup
Select each Input that has a source connected (1, 2, 3, & 4).
• For AGCEnable
Choose N (no) or Y (yes).
C
Mixer Output Set-up
• For Input Mix
Choose N (no) or Y (yes).
• For Output Vol Lvl
Note: AGC defaults to N.
AGC is recommended for use
with low-level sources (i.e.
microphone with low sensitivity).
Select each Output to be used (1, 2, or Auxout).
• For Output Bass Lvl
and Input Treb Lvl
Adjust the value to +/-6 dB in increments of .5 dB.
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D
Mixer EQ Set-up
5.0 System Setup
Select each Output to be used (1, 2, or Auxout).
• For Spkr EQ
Move up or down to choose the EQ
setting needed.
An asterisk (*) marks the selection made.
• For Dynamic EQ Enable
Choose N (no) or Y (yes).
Note: Dynamic EQ maintains tonal balance at all
listening levels. The equalization adjusts automatically
for the output level setting.
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E
Mixer Page In Set-up
5.0 System Setup
• For Page Vol Lvl
• For Page Bass Adj
and Page Treb Adj
Adjust the value to
+/-6 dB in increments of .5 dB.
• For Page Enable
Choose N (no) or
Y (yes).
• For Page Ducking
Lvl Adj
Adjust the value from
-50 dB to 0 dB in increments of
1 dB.
• For Output Lvl Adj
Adjust the value to
+/-20 dB in increments
of 1 dB.
• For Page Trig Mode
Choose PTT or Auto.
Note: In Page Trig Mode, the page
output can be triggered by pushing
the button on a push-to-talk-style
microphone (PTT), or triggers
automatically when a signal is
detected at the Page input (Auto).
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F
F
Mixer Direct In Set-up
Mixer Direct In Set-up
5.0 System Setup
• For Vol Adj
Adjust the value from -40 dB to
+10 dB in increments of 1 dB.
• For Bass Adj and Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
G
Mixer Master Vol Set-up
• For Output Linked
Choose N (no)
or Y (yes).
Note: Y links Output 1 and Output 2
gains for control using the
Output 1 gain knob.
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5.0 System Setup
5.4 Stereo Select Mode settings
Here is an overview of common steps to follow in setting up the
Stereo Select Mode:
A. Choose this mode.
B. Set up inputs.
C. Set up outputs.
D. Choose EQ settings.
E. Set up Page Input, if applicable.
F. Set up Direct Input, if applicable.
Setup menus unfold as you move right to the options provided,
as shown.
5.4.1 Remember: for adjustments, use three steps
• For various adjustments (designated by Adj), use these steps:
1. Press SELECT to activate the Adj field.
2. Using the up or down arrow, adjust the value.
3. Press SELECT to confirm the setting and move on.
• For level changes (designated by Lvl), use front panel controls
as shown.
• To change Input Vol Lvl, use:
• To change Output Vol Lvl, use:
• To change Output Bass Lvl and Output
• To change Page Vol Lvl, use:
Treb Lv l , use a screwdriver to turn:
A
Choose Stereo Select Mode
Press SELECT ( ) to confirm the mode selection.
An asterisk (*) marks the selection made.
B
next page
C
next page
D
page 24
E
page 24
22 of 36
F
page 25
B
Stereo Select Input Set-up
5.0 System Setup
Select each Input that has a source connected.
• For Input Vol Lvl
• For Input Bass Adj and Input Treb Adj
Adjust the value to +/-6 dB in increments of .5 dB.
• For AGCEnable
Choose N (no) or Y (yes).
Note: AGC defaults to N. AGC is recommended for use with low-level
sources (i.e., microphone with low sensitivity).
Stereo Select Output Set-up
C
• For Output Vol Lvl
• For Output Bass Lvl and Input Treb Lvl
Adjust the value to +/-6 dB in increments of .5 dB.
• For Out 1/2 Input Sel
Select each Output to be used (1/2 or Auxout).
• For Auxout Input Sel
Selects which inputs are
routed to the Aux output.
Input TrackWP tracks to
A/B switch on user interface.
Note: If TrackWP is selected and a user interface is installed, the input
(A/B) selected on the user interface will be displayed.
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D
Stereo Select EQ Set-up
5.0 System Setup
• For Spkr EQ
Move up or down
to choose the EQ setting needed.
An asterisk (*) marks the selection made
• For Dynamic EQ Enable
Choose N (no) or Y (yes).
Stereo Select Page In Set-up
E
Note: Dynamic EQ maintains tonal balance at
all listening levels. The equalization adjusts
automatically for the output level setting.
• For Page Vol Lvl
• For Page Bass Adj
and Page Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
• For Page Enable
Choose N (no) or Y (yes).
• For Page Ducking Lvl Adj
Adjust the value from
-50 dB to 0 dB in increments
of 1 dB.
• For Output Lvl Adj
Adjust the value to +/-20 dB
in increments of 1 dB.
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• For Page Trig Mode. Choose
PTT or Auto.
Note: In Page Trig Mode, the page
output can be triggered by pushing
the button on a push-to-talk-style
microphone (PTT), or triggers
automatically when a signal is
detected at the Page input (Auto).
F
Stereo Select Direct in Set-up
5.0 System Setup
• For Vol A dj
Adjust the value from -40 dB to
+10 dB in increments of 1 dB.
• For Bass Adj and Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
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5.0 System Setup
5.5 Dual Mono Select Mode settings
Here is an overview of common steps to follow in setting up the
Dual Mono Select Mode:
A. Choose this mode.
B. Set up inputs.
C. Set up outputs.
D. Choose EQ settings.
E. Set up Page Input, if applicable.
F. Set up Direct Input, if applicable.
Setup menus unfold as you move right to the options provided,
as shown.
5.5.1 Remember: for adjustments, use three steps
• For various adjustments (designated by Adj), use these steps:
1. Press SELECT to activate the Adj field.
2. Using the up or down arrow, adjust the value.
3. Press SELECT to confirm the setting and move on.
• For level changes (designated by Lvl), use front panel controls
as shown.
• To change Input Vol Lvl, use:
• To change Output Vol Lvl, use:
• To change Output Bass Lvl and Output
Tre b Lv l , use a screwdriver to turn:
• To change Page Vol Lvl, use:
A
Choose Dual Mono Mode
Press SELECT ( ) to confirm the mode selection.
An asterisk (*) marks the selection made.
B
next page
C
next page
D
page 28
E
page 28
F
page 29
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B
Dual Mono Select Input Set-up
5.0 System Setup
Select each Input that has a source connected (1, 2, 3 & 4).
• For Input Vol Lvl
• For Input Bass Adj
and Input Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
• For AGCEnable
Choose N (no) or Y (yes).
C
Dual Mono Select Output Set-up
Note: AGC defaults to N. AGC is recommended for
use with low-level sources (i.e., microphone with low
sensitivity).
Select each Output
to be used (1, 2,
or Auxout).
• For Output Vol Lvl
• For Output Bass Lvl and Input Treb Lvl
Adjust the value to +/-6 dB in increments of .5 dB.
• For Out 1 and Out 2 Input Sel
• For Auxout Input Sel
Selects which inputs are routed to the Aux output.
Input TrackWP tracks to A/B switch on user interface.
Note: If TrackWP is selected and a user interface is installed, the input
(A/B) selected on the user interface will be displayed.
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D
Dual Mono Select EQ Set-up
E
Dual Mono Select Page in Set-up
5.0 System Setup
• For Spkr EQ
Move up or down
to choose the EQ setting needed.
An asterisk (*) marks the selection made.
• For Dynamic EQ Enable
Choose N (no) or Y (yes).
Note: Dynamic EQ maintains tonal balance
at all listening levels. The equalization adjusts
automatically for the output level setting.
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• For Page Vol Lvl
• For Page Bass Adj
and Page Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
• For Page Enable
Choose N (no) or Y (yes).
• For Page Ducking Lvl Adj
Adjust the value from
-50 dB to 0 dB in
increments of 1 dB.
• For Output Lvl Adj
Adjust the value to
+/-20 dB in increments
of 1 dB.
• For Page Trig Mode. Choose PTT or Auto.
Note: In Page Trig Mode, the page output can be
triggered by pushing the button on a push-to-talk-style
microphone (PTT), or triggers automatically when a
signal is detected at the Page input (Auto).
Dual Mono Select Direct In Set-up
F
5.0 System Setup
• For Vol Adj
Adjust the value from
-40 dB to +10 dB
in increments of 1 dB.
• For Bass Adj and Treb Adj
Adjust the value to +/-6 dB
in increments of .5 dB.
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5.0 System Setup
5.6 Overview of Utility Mode settings
In Utility Mode, there are two global system options: Lockout and
Restore Factory Defaults. Also, current system firmware and EQ
versions are viewable.
The Lockout option allows the system settings to be locked to
prevent unwanted changes. This Lockout function can be
disengaged by pressing and holding the left and right arrows
simultaneously for five seconds. Lockout Off will appear.
The Restore Factory Defaults option allows all softwareselectable settings to be set back to the original factory settings.
See “Factory Default Settings” on page 33.
Note: Settings made using a control knob are not reset.
Choose Utility Mode
• For FW Version
Version number of system
firmware will be displayed.
• For EQ Version
Version number of
loudspeaker EQ set
will be displayed.
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6.0 User Interfaces
6.1 User interface use
Bose has designed two user interface
controls for use with the FreeSpace®
DXA 2120 Digital Mixer/Amplifier.
• Bose volume control user interface
is for use when only volume control is
required.
• Bose volume control with A/B select
user interface is for use in Stereo Select
Mode or Dual Mono Select Mode when
an output provides audio from more than
one input source.
Connection of one or two user interfaces to the chassis disables
the output gain knob for the output assigned to that user
interface.
6.1.1 Mode user interface requirements
• For Mixer Mode:
Sources can be routed to either or both outputs. Use of one or
two volume control user interfaces is optional. No user inter
faces are required.
• For Stereo Select Mode:
Source routing is fixed. This mode supports the use of one user
interface in a single zone. Use the volume control with A/B
select user interface.
• For Dual Mono Select Mode:
Source routing is fixed. This mode supports the use of one user
interface for each output channel. Use two volume controls
with A/B select user interfaces.
-
6.1.1.1 Mixer Mode user interface application
Adjusts
the volume
of the OUTPUT 1
audio mix
GAIN knobs
disabled with
user interface
use
Note: Output 1 gain can be configured as the Master Volume,
controlling Output 1 and Output 2 gains simultaneously using the
MasterVol Linked menu option.
6.1.1.2 Stereo Select Mode user interface application
GAIN knobs
disabled with
user interface
use
Adjusts
the volume
of the OUTPUT 2
audio mix
Adjusts
the volume
Selects one
source (A) or
the other (B)
in the single zone
6.1.1.3 Dual Mono Select Mode user interface application
Adjusts
the volume
Selects one
source (A) or
the other (B)
in Zone 1
GAIN knobs
disabled with
ser interface
use
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Adjusts
the volume
Selects one
source (A) or
the other (B)
in Zone 2
7.0 Troubleshooting Table
No Power
Power is on, but no sound
Power is on, but sound is low
Sound is distorted
Unnatural sound
User interfaces do not operate
properly
• Turn on power.
• Make sure the power cord is plugged in.
• Make sure the source is turned on.
• Verify that there is an input signal from the source. The audio input signal indicator on
the front of the chassis should be green.
• Check the output signal indicators on the system controls. If the LED is not lit (green),
the output levels may be too low.
• Check the source routing.
• Check the cable connections from the source to the chassis.
• Verify the user interfaces are of the right type for the operating mode selected.
• Verify that the audio input indicator is lit (green). If it is not lit, increase the source
output or increase the input gain.
• Verify that the Input clipping indicators are not lit (red). If an LED is red, reduce the
source output level or reduce the input gain.
• Verify that the Output clipping indicators are not lit (red). If one is red, but Input clipping LEDs are not, reduce the output gain.
• If the input source signal is clean when it enters the chassis and the Input and Output
indicators are green, verify that the loudspeakers are not overdriven or damaged.
• Verify that the correct EQ is selected for speakers connected to the Output channel.
• Verify that the speakers are wired correctly (+ to + and - to -).
• Verify that the user interfaces are wired correctly and to the proper zone (if there is
more than one zone).
• Check the wiring for breaks or shorts in the cable.
• Verify the user interfaces are of the right type for the operating mode selected.
7.1 Technical assistance
If you need further technical assistance, contact your local Bose® representative, or visit pro.Bose.com.
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8.0 Reference
8.1 Factory Default Settings
Channel Parameter Mixer Stereo Dual Mono
Input 1 Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
AGC Enable N N N
Input 2 Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
AGC Enable N N N
Input 3 Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
AGC Enable N N N
Input 4 Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
AGC Enable N N N
Page Input Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Trigger M o d e PTT PTT PTT
Page Ducking -20 dB -20 dB -20 dB -50 dB ~ 0 dB
Direct Input Volum e 0 dB 0 dB 0 dB -40 dB ~ +10 dB
Bass 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Tre bl e 0 dB 0 dB 0 dB -6 dB ~ +6 dB
Miscellaneous Master Volume Linked N n/a n/a
Output 1 *Out 1/2 Input Sel (Stereo only) n/a *1/2 (1) n/a
Out 1 Input Sel (Dual Mono only) n/a n/a 1
Input Mix - Input 1 (Mixer only) Y n/a n/a
Input Mix - Input 2 (Mixer only) N n/a n/a
Input Mix - Input 3 (Mixer only) N n/a n/a
Input Mix - Input 4 (Mixer only) N n/a n/a
Spkr EQ Preset 01 80 Hz HPF 01 80 Hz HPF 01 80 Hz HPF
Dynamic EQ Enable N N N
Page Enable N N N
Page Level 0 dB 0 dB 0 dB -20 dB ~ +20 dB
Output 2 *Out 1/2 Input Sel (Stereo only) n/a *1/2 (2) n/a
Out 2 Input Sel (Dual Mono only) n/a n/a 3
Input Mix - Input 1 (Mixer only) Y n/a n/a
Input Mix - Input 2 (Mixer only) N n/a n/a
Input Mix - Input 3 (Mixer only) N n/a n/a
Input Mix - Input 4 (Mixer only) N n/a n/a
Spkr EQ Preset 01 80 Hz HPF 01 80 Hz HPF 01 80 Hz HPF
Dynamic EQ Enable N N N
Page Enable N N N
Page Level 0 dB 0 dB 0 dB -20 dB ~ +20 dB
Auxout Auxout Input Sel (Stereo/Dual Mono) n/a 1+2 sum 1 Fixed
Auxout Input Mix - Input 1 (Mixer only) Y n/a n/a
Auxout Input Mix - Input 2 (Mixer only) N n/a n/a
Auxout Input Mix - Input 3 (Mixer only) N n/a n/a
Auxout Input Mix - Input 4 (Mixer only) N n/a n/a
Spkr EQ Preset 01 80 Hz HPF 01 80 Hz HPF 01 80 Hz HPF
Dynamic EQ Enable N N N
Page Enable N N N
Page Level 0 dB 0 dB 0 dB -20 dB ~ +20 dB
Parameter Range
(if applicable)
*These parameters are linked and displayed on the same menu screen. The numbers in parenthesis indicate which input is automatically selected and routed to the respective output.
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©2007 Bose Corporation, The Mountain
Framingham, MA 01701-9168 USA
AM298725 Rev.00
pro.Bose.com
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