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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 configu-
ration. 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 loud-
speakers.
• 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.
1.0 Introduction.fm Page 5 Monday, February 12, 2007 8:50 AM