Bose FreeSpace IZA 2120-HZ Manual de instalação e operação - Página 18

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Bose FreeSpace IZA 2120-HZ Manual de instalação e operação

Front and Rear Panels

IZA 2120-LZ Rear Panel

Figure 3. FreeSpace IZA 2120-LZ amplifier rear panel

q INPUT A/B - Balanced and unbalanced line-level input connectors.

w INPUT GAIN - Allows for 0 dB to –30 dB of adjustment to each INPUT A/B.

e MUTE - Contact closure connection that upon trigger (short) will mute all outputs (including AUX OUTPUT).

r PAGE INPUT - Euroblock mic/line input that supports dynamic microphones with voice activation (VOX) or a trigger contact

closure for use with push-to-talk (PTT) microphones.

t PAGE INPUT GAIN - Allows for 0 dB to +50 dB of gain control of PAGE INPUT signal.

y PAGE INPUT THRESHOLD - Adjusts the level at which the VOX PAGE INPUT signal causes other inputs to be lowered. A 10 dB

adjustment range lifts the page trigger level away from the noise floor to prevent false triggers. At minimum setting, a –70 dBu

signal will trigger a VOX page. At maximum setting, a –60 dBu signal will trigger a VOX page. When in PTT page mode this

adjustment is not active.

u EQ - Provides loudspeaker equalization presets: Flat, DS 16, DS 40, DS 100 and RMU105. Use the Flat setting for loudspeakers that

are not Bose or that do not require EQ.

i DIP Switches - A bank of switches to set the amplifier configuration. All switches set to the left position is the standard

configuration.

• OUTPUT - Sets the outputs to either STEREO or MONO mode.

• A/B SELECT - Determines if A/B inputs are selected by the front panel INPUT A/INPUT B switch (FRONT) or the rear panel

remote control input (REMOTE).

• AUTO STANDBY - If enabled (ON) the amplifier will go into standby mode after twenty minutes without an input signal. If in

standby mode and an audio signal is detected, the amplifier will automatically wake and amplify audio within 0.7 seconds. The

OFF position disables this feature.

• PAGE BYPASS MASTER - Sets the paging volume to follow the front panel MASTER LEVEL setting (OFF) or to output maximum

volume (ON). The PAGE INPUT GAIN adjustment is available in either mode. Use this feature if the output volume is too low to

hear a page.

• PAGE MODE - Sets the amplifier to mix paging (MIX) with the selected input source or to duck the input source (DUCK) when

paging is activated.

• PAGE START - Determines if paging is to be activated by a push-to-talk (PTT) stimulus or voice stimulus (VOX).

• AUX OUTPUT (FLAT/EQ) - Determines if the auxiliary output will either have no EQ adjustment (FLAT) or an EQ adjustment

determined by the EQ slide switch position (EQ).

• AUX OUTPUT (FIXED/VARIABLE) - Sets the auxiliary output level to either follow the front panel MASTER LEVEL control

setting (VARIABLE), or to the maximum output level (FIXED).

• AUX INPUT - Enables (ENABLED) or disables (DISABLED) the auxiliary input. If enabled, inserting a cable into the auxiliary

input will mute INPUT A and B.

o AUX OUTPUT - Variable or fixed, unbalanced line-level output signal for use with ZA zone amplifiers or for routing the signal to

additional audio equipment.

a REMOTE - Input connector for either a Bose

volume control user interface accessory (PC 041966).

s OUTPUT 1/OUTPUT 2 TRIM - Allows for up to 40 dB attenuation of the individual loudspeaker outputs relative to the master level.

d OUTPUT - Two inverted 2-pin Euroblock connectors for loudspeaker connections. Outputs are not bridgeable.

18 - Installation Guide

w e r

volume control with A/B switch user interface accessory (PC 041967) or a Bose

FIXED

VARIABLE

AUX OUTPUT

pro.Bose.com

s d