RTI AMR-350 User Manual

AMR-350

Mini Audio Amplifier

All Rights Reserved

Version: AMR-350_2017V1.0

User Manual

Mini Audio Amplifier

Preface

Read this user manual carefully before using the product. Pictures shown in this manual
is for reference only, different model and specifications are subject to real product.

This manual is only for operation instruction only, not for any maintenance usage. The
functions described in this version are updated till November 3, 2017. In the constant
effort to improve our product, we reserve the right to make functions or parameters
changes without notice or obligation. Please refer to the dealers for the latest details.

Trademarks

Product model and logo are trademarks. Any other trademarks mentioned in this manual
are acknowledged as the properties of the trademark owner. No part of this publication
may be copied or reproduced without prior written consent.

FCC Statement

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 communications. It has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a commercial
installation.

Operation of this equipment in a residential area is likely to cause interference, in which
case the user at their own expense will be required to take whatever measures may be
necessary to correct the interference

Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.

Mini Audio Amplifier

SAFETY PRECAUTIONS

To insure the best from the product, please read all instructions carefully before using
the device. Save this manual for further reference.

 Unpack the equipment carefully and save the original box and packing material for

possible future shipment

 Follow basic safety precautions to reduce the risk of fire, electrical shock and injury

to persons.

 Do not dismantle the housing or modify the module. It may result in electrical shock

or burn.

 Using supplies or parts not meeting the products’ specifications may cause damage,

deterioration or malfunction.

 Refer all servicing to qualified service personnel.
 To prevent fire or shock hazard, do not expose the unit to rain, moisture or install this

product near water.

 Do not put any heavy items on the extension cable in case of extrusion.
 Do not remove the housing of the device as opening or removing housing may

expose you to dangerous voltage or other hazards.

 Install the device in a place with fine ventilation to avoid damage caused by

overheat.

 Keep the module away from liquids.
 Spillage into the housing may result in fire, electrical shock, or equipment damage. If

an object or liquid falls or spills on to the housing, unplug the module immediately.

 Do not twist or pull by force ends of the optical cable. It can cause malfunction.
 Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to

the device before cleaning.

 Unplug the power cord when left unused for a long period of time.
 Information on disposal for scrapped devices: do not burn or mix with general

household waste, please treat them as normal electrical wastes.

Mini Audio Amplifier

Contents

1. Introduction ........................................................................................................................................ 1

1.1 Introduction to AMR-350 ........................................................................................................... 1

1.2 Features ................................................................................................................................... 1

1.3 Package List ............................................................................................................................. 1

2. Panel Description ............................................................................................................................... 2

2.1 Front Panel ............................................................................................................................... 2

2.2 Rear Panel ............................................................................................................................... 3

3. System Connection ............................................................................................................................ 4

3.1 Usage Precaution ..................................................................................................................... 4

3.2 System Diagram ....................................................................................................................... 4

3.3 Connection Procedure .............................................................................................................. 4

3.4 Audio Output Connection .......................................................................................................... 5

3.4.1 Stereo Output (default): 2x50Watt@8Ohm .................................................................... 5

3.4.2 Mono Output: 1x100Watt@4Ohm ................................................................................. 5

3.5 Loop Connection ...................................................................................................................... 6

3.6 Application ................................................................................................................................ 6

4. System Control .................................................................................................................................. 7

4.1 Front Panel Button Control ....................................................................................................... 7

4.2 IR Control ................................................................................................................................. 8

4.3 RS232 Control .......................................................................................................................... 9

4.3.1 RS232 Control Software ............................................................................................... 9

4.3.2 Basic Setting ................................................................................................................ 9

4.3.3 RS232 Command ........................................................................................................ 11

4.4 TCP/IP Control ....................................................................................................................... 12

4.4.1 Control Mode ...............................................................................................................12

4.4.2 Control via TCP/IP Communication Software ...............................................................14

4.4.3 Control via Web-based GUI .........................................................................................15

4.4.4 Port Management ........................................................................................................17

5. Specification .....................................................................................................................................18

6. Panel Drawing ................................ ................................................................ ..................................19

7. Troubleshooting & Maintenance ........................................................................................................20

8. Customer Service .............................................................................................................................21

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1. Introduction

1.1 Introduction to AMR-350

The AMR-350 is a compact-size digital amplifier (Class-D) with 3 inputs (1 L+R stereo
audio, 1 analog audio, 1 optical fiber audio). It features switchable stereo or mono
output, and boasts complete EQ adjustment and intuitive work status display, making it
an ideal addition to a classroom or conference room application.

1.2 Features

 3 audio inputs: 1 L+R stereo, 1 analog, 1 optical fiber.
 Switchable stereo / mono output.
 Complete EQ management: including LINE, BASS and TREBLE.
 Easy volume adjustment via a rotary knob.
 Audio loop output.
 Intuitive LED indicators for input source, control and volume setting.
 Controllable via RS232, IR, TCP/IP (optional).
 Web-based GUI.
 Power off memory

1.3 Package List

 1 x AMR-350

 2 x Detachable Mounting Ears

 4 x Screws

 2 x Pluggable Terminal Blocks (1 3-pin& 1 4-pin)

 1 x IR Remote

 1 x Power Adapter (DC 36V 2.66A)

 1 x User manual

 1 x IR Receiver (5V, without carrier)

 Please confirm if the product and the accessories are all included, if not, please

contact with the dealers.

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2. Panel Description

2.1 Front Panel

Figure 2- 1 Front Panel

No.

Name

Description

①

Power LED

Illuminates red when powered on.

②

Input Selection

Press to select any one of the 3 inputs, indicators will light
accordingly.
Input 1~3 corresponds to audio sources connected to the 3
audio input ports separately.

 1: L+R stereo audio.
 2: 3.5mm analog audio.
 3: optical audio.

③

Control

Press to select the audio to be controlled, including LINE,
BASS and TREBLE.

④

Volume Knob

 Press to mute/unmute the audio.

Note: after pressed the button to mute the audio, except
pressing it again to restore the audio at the same volume,
users can rotate the knob to enable audio output at
respective volume.

 Rotate the knob to adjust volume, volume bars will change

accordingly

 Clockwise Rotation: Volume up.
 Anticlockwise Rotation: Volume down.

⑤

Volume Bars

Indicate real-time volume setting, 10 bars in total, no volume
bar will be lighted when the audio is muted.

Operation Format: “INPUT SEL” + “CONTROL” + “Volume Knob”
Example: To adjust bass audio of input 3, select input 3 -> choose bass -> adjust the
volume knob.

CONTROLINPUT SEL

1

2

3

LINE

BASS

VOLUME

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2.2 Rear Panel

Figure 2- 2 Rear Panel

No.

Name

Description

①

CONTROL
TCP/IP: (optional) Connect with control device to enable IP

control via web-based GUI& TCP/IP communication software;
Indicators will blink when connected to control device and

communicated normally.

RS232: Connect with control device to enable serial control.

IR IN: Connect with IR receiver to collect infrade signal.

Channel Switcher: Dial to STEREO or MONO to enable

corresponding output mode.

②

INPUTS

Audio inputs area, 3 audio inputs in total, including 1 stereo
audio, 1 analog audio and 1 optical audio.

③

OUTPUTS
LOOP: Analog audio loop output port, available only when

input signal is L+R stereo audio.

Audio Output: Including stereo audio (2x50W@8Ω), or mono
output (1x100W@4Ω).

④

DC 36V

Insert DC 36V 2.66A power adapter here.

⑤

GND

Connect to grounding.

 Dial the Channel Switcher to demand status before connecting output device.

Once connected, do not try to change the status while it’s working.

LOOP

3

1

DC 36V

IR INRS232

Tx

Rx

AUDIO OPTICALL R

2

TCP/IP

2x50W 8@

Ω

1x100W 4 @

STEREO

MONO

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3. System Connection

3.1 Usage Precaution

 Verify all components and accessories included before installation.
 System should be installed in a clean environment with proper temperature and

humidity.

 All of the power switches, plugs, sockets and power cords should be insulated and

safe.

 All devices should be connected before power on.

3.2 System Diagram

Figure 3- 1 System Diagram

3.3 Connection Procedure

Step1. Connect audio sources (such as Blue-ray DVD) to INPUT ports of the device with

audio cables;

Step2. Dial the Channel Switcher to the right status, and connect audio output devices

(such as speakers) to audio output port accordingly (Specified in 3.4 Audio
Output Connection).

Step3. (optional) Insert an IR receiver (5V, without carrier) to IR IN to enable IR control.

Laptop

Speaker

Audio Amplifier

IR Remote

IR Receiver

Audio Amplifier

IR Signal:

AUDIO Signal:

Control Signal:

DVD

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Step4. (optional) Connect a control device (e.g. a PC) to RS232 port to enable serial

control.

Step5. (optional) Connect a control device (e.g. a PC) to TCP/IP port to enable IP

control.

Step6. Plug DC 36V power adaptor to the power port of AMR-350.

3.4 Audio Output Connection

3.4.1 Stereo Output (default): 2x50Watt@8Ohm

Dial the switcher to STEREO to enable 2 50Watt@8Ohm stereo output mode. Connect
the amplifier regularly (as shown in the following figure):

Figure 3- 2 Stereo Output Connection

3.4.2 Mono Output: 1x100Watt@4Ohm

To enable mono 1x100Watt@4Ohm output, dial the switcher to MONO, and connect
output devices as the figure below:

Figure 3- 3 Mono Output Connection

LOOP

3

1

DC 36V

IR INRS232

Tx

Rx

AUDI O OPTICALL R

2

TCP/ IP

2x50W 8@

Ω

1x100W 4 @

STER EO

MONO

Speaker

Speaker

Switch to "STEREO"

STEREO

MONO

LOOP

3

1

DC 36V

IR INRS2 32

Tx

Rx

AUDI O OPTICALL R

2

TCP/ IP

2x50 W 8@

Ω

1x10 0W 4 @

STER EO

MONO

Speaker

STEREO

MONO

Switch to "MONO"