Bose Volume Control with A/B Select User Interface User Manual download pdf (Page 6)

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FreeSpace

DXA 2120

Digital Mixer/Amplifier

TECHNICAL DATA SHEET

Engineers’ and Architects’

Specifications

The unit shall be a digital mixer/amplifier.

The unit shall use a digital signal processing

architecture running at 44.1 kHz sample rate.

The frequency response shall be from 40 Hz to

16 kHz (+0/-3 dB). The dynamic range shall be

80 dB (typical) 40 Hz to 16 kHz. The signal-to-noise

ratio shall be 75 dB or greater (A-weighted).

The unit shall have mixing and routing capabilities

as well as amplification. The unit’s DSP shall

feature selectable Bose

loudspeaker EQs as

well as dynamic equalization.

The input section shall have four mic/line inputs,

one direct input and one page input. The mic/line

inputs shall have both 3-pin Euroblock connectors

for balanced mic/line inputs and dual RCA jacks

(summed to mono) for unbalanced line inputs.

The direct and page inputs shall have 4-pin

Euroblock connectors for balanced inputs.

The page input shall be operated in PTT (push

to talk) or Auto mode and provide automatic

ducking for announcements.

The direct input shall automatically override

all other inputs when a signal is detected for

emergency signaling purposes.

The output section shall feature two powered

loudspeaker outputs with 5-terminal inverted

Euroblock connectors. The unit will have an

auxiliary output with a 3-pin Euroblock connector.

The amplifier section shall contain two powered

outputs for high or low impedance: 2 x 120W at

Ω or 2 x 100W at 70/100V. The THD shall be

less than 0.5% @ full rated power.

The unit shall feature three different modes of

operation: Mixer Mode, Stereo Select Mode and

Dual Mono Select Mode.

The 100V variant will operate at 100V AC.

A second variant will be able to operate at

120V/220-240V AC; there will be an AC input

voltage switch on the unit. The unit shall

consume AC power of 40W or less at idle,

350W at maximum continuous rated power

and also will have a 2-terminal barrier strip for

connecting a 24V DC backup power supply.

The unit will have a remote input with a

6-pin Euroblock connector for using one or

two volume controls and/or volume control

with A/B select user interfaces.

The unit shall be configurable via the onboard

controls and feature a “lockout” feature to

prevent unwanted system changes. An RS-232

COM port will be available for system updates.

The unit shall be the Bose

FreeSpace

DXA 2120

digital mixer/amplifier.

Safety and Regulatory Compliance

The 120V/220-240V AC variant (PC 040753,

PC 040754, PC 040755, PC 040756) of the

FreeSpace DXA 2120 digital mixer/amplifier

complies with CE requirements, is UL Listed

according to UL60065 (7th edition) and

CAN/CSA C22.2 No. 60065-03; CB approved,

according to IEC60065 (7th edition), including

group and National differences; GS approved,

according to EN60065 (7th edition). It also

complies with FCC Part 15B Class A (2003),

EN55103-1 (1997), EN55103-2 (1996), and

CISPR13 (2003) requirements.

The 100V variant (PC 040742) of the DXA 2120

digital mixer/amplifier is PSE compliant.

Limited Warranty

The FreeSpace DXA 2120 digital mixer/amplifier

is covered by a two-year transferable limited

warranty.

How our Products are Measured

1. Amplifier power

A single channel is driven to full power

with the nominal load impedance (120W/4Ω,

100W/70V/49

Ω, 100W/100V/98Ω). Output

power is measured using a 1 kHz sine wave

with a THD of less than 0.5%, as measured

at the amplifier output.

2. Dynamic range

The output of the amplifier is connected to

the rated load impedance, and the input and

output gains are set to maximum. A dB-calibrated

voltmeter is connected to the amplifier’s output

through an A-weighting filter (in accordance

with IEC 60651). A 1 kHz signal is connected to

one of the line inputs, and the level is adjusted

to achieve the amplifier’s rated output power.

The voltmeter is then zero-referenced. The

signal source is removed, and the line input is

shorted. The dB-calibrated voltmeter now reads

the absolute dynamic range of the system.

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Bose Volume Control with A/B Select User Interface User Manual Page 6

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