Marshall Electronics AR-AM4 Manuel utilisateur

Marshall Electronics

AR-AM4

Analog Audio Monitor

Operating Instructions

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Contents

Product Overview ...............................................................................................................................5

Features...............................................................................................................................................5

Installation and Initial Setup ..............................................................................................................5

Unpacking........................................................................................................................................................ 5

Audio Monitor Mounting .............................................................................................................................. 5

Quick Start Guide................................................................................................................................6

Front Panel Features ..........................................................................................................................7

Rear Panel Features ...........................................................................................................................8

Basic Operation ..................................................................................................................................9

Overview........................................................................................................................................................... 9

Volume Control...............................................................................................................................................................................9

Channel Select................................................................................................................................................................................9

Balance Control ..............................................................................................................................................................................9

Headphone Output..........................................................................................................................................................................9

Specifications....................................................................................................................................10

AR-AM4 Audio Monitor............................................................................................................................... 10

Input / Output ................................................................................................................................................ 11

Warranty ............................................................................................................................................12

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Product Overview

The AR-AM4 is a four-channel stereo analog audio monitoring system. Designed for ultra-near field audio monitoring in

space critical environments, the AR-AM4 is ideal for TV facilities, studios, post-production facilities, VTR bays, mobile

production vehicles, satellite links, and wherever analog audio monitoring is required.

The AR-AM4 features stereo loudspeakers in a compact 1RU form factor, with analog amplification and digital processing

providing pristine audio quality.

Features

■Selectable Inputs

Choose between 4 independent sets of stereo inputs.

■Superior Audio Quality

Stereo Loud Speakers provide superior audio quality in a compact 1RU form factor.

■Digital Processing

Digital signal processing provides speaker protection.

■Stereo Headphone Output

¼” stereo headphone jack located on front panel.

Installation and Initial Setup

Unpacking

Carefully unpack the AR-AM4 audio monitor and verify that the following items are included:

• AR-AM4 Audio Monitor

• Power Supply with 4-Pin XLR Connector (29VDC)

• AC Power Cable

• Operating Instructions

Inspect the unit for any physical damage that may have occurred during shipping. Should there be any damage,

immediately contact Marshall Electronics at (800) 800-6608. If you are not located within the continental United States,

call +1 (310) 333-0606.

Audio Monitor Installation

The AR-AM4 audio monitor can be installed in an EIA-standard 19-inch rack. At only 6” inches deep, the AR-AM4 can

also be installed in many shallow racks cases. Alternately, the AR-AM4 audio monitor can be placed on any level surface.

For optimum sound quality, the audio monitor should be installed at ear level.

Quick Start Guide

1. Connect an Audio Source

Connect an audio source to any of the 4 pairs of rear panel input connectors. We recommend the use of the

Balanced XLR female connectors using a balanced audio signal with a nominal level of +4dBu.

2. Power On the Audio Monitor

Supply power to the audio monitor by connecting the included power supply to an AC power source (100-240 V @

50/60 Hz) and connecting the power supply’s 4-pin XLR connector to the back of the audio monitor. The Power LED

on the front panel will illuminate green.

3. Select Input Channel

Use the Input Select controls to choose one of the four inputs.

4. Adjust the Volume and Balance

Use the Volume and Balance controls to adjust the sound level and stereo balance.

Front Panel Features

Stereo Loudspeakers

The stereo loudspeakers are always active

regardless of connected headphones.

Power Indication LED

The power LED will illuminate green when power is

supplied to the audio monitor.

Headphone Output

The headphone output accepts stereo headphones

with a 1/4" TRS connecter.

Headphone Volume Control

The headphone volume control affects only the stereo

headphone jack.

Input Select

Rotate knob to switch between input channels 1

through 4.

Master Volume Control

The master volume control affects only the stereo

speakers.

Balance Control

The balance control adjusts the relative level of each

left and right input to the speakers and headphones.

Rear Panel Features

Power Input Connector

Use only the included power supply to power the AR-AM4 audio monitor.

Audio Outputs

XLR- 3pin male connector. Balanced audio out is same level as XLR audio input. This is an active output from the

selected Audio Input.

Audio Inputs

XLR - 3pin female connector. Balanced audio in. Pin 1= ground, Pin 2= Signal +, Pin 3= Signal -

Basic Operation

Overview

Basic operation of the AR-AM4 Audio Monitor involves connecting audio sources, and monitoring through the stereo

speakers.

The user can choose between listening to the amplified internal speakers, or headphones. Audio volume can be adjusted

from front panel controls.

There are four (4) separate stereo input channels. One can be selected at any time from the front panel.

Controls

■Volume Control

The VOLUME control affects only the stereo speakers.

■Channel Select

The Channel Select controls which of the four inputs is selected to the speakers, headphones and rear XLR Outputs.

■Balance Control

The BALANCE control adjusts the relative levels of the LEFT and RIGHT channels of the input, affecting both the

stereo speakers and headphone output.

■Headphone Output

The headphone output accepts standard stereo headphones with a 1/4" TRS connector. Headphones with an 1/8”

(3.5mm) mini-plug connector may be used with an adapter. NOTE: The stereo speakers are NOT muted when a

connector is plugged into the headphone output. Headphones are not included with this unit.

Specifications

AR-AM4 Audio Monitor

■ACOUSTIC

Speaker Power Output: Left/Right RMS @ 4Ω: 3W RMS, 5W Peak

Peak Acoustic Output: 99 dB SPL @ .1m

Headphone Power Output: 150 mW

■ELECTRICAL

Power Consumption: 40W

Voltage Requirement: 29VDC

Included Power Supply

AC Input: 100V-240V, 1.0A, 50-60Hz

DC Output: 29VDC, 1.65A,

■MECHANICAL

Dimensions (w x h x d): 19.0” x 1.75” x 6.0”

Rack Height: 1 RU

Weight: 4.55 lbs. (2 kg)

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