Amc Mma 120x User manual

IMPORTANT SAFETY INSTRUCTIONS

When using this electronic device,

basic precautions should always be

taken, including the following:

1. Read all instructions before using the product.

2. Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a

wet basement or near a swimming pool etc).

3. Use this device when you are sure thatamplifierhas a stable base and it is fixed securely.

4. This product, in combination with loudspeakers may be capable of producing sound

levels that could cause permanent hearing loss. Do not operate for a long period of

time at a high volume level or at a level that is uncomfortable. If you experience any

hearing loss or ringing in the ears, you should consult with otorhinolaryngologists. The

product should be positioned so that proper ventilation is maintained.

5. The product should be located away from heat sources such as radiators, heat vents, or

other devices (including amplifiers) that produce heat.

6. The product should be connected to a power supply that is described in the operating

instructions or are marked on the product. Replace the fuse only with one of the

specified type, size and correct rating.

7. The power supply cord should be undamaged and never share an outlet or extension

cord with other devices so that the outlet or extension cord's power rating is

exceeded. Never leave device plugged into the outlet when it is not being used for a

long period of time.

8. Care should be taken so that objects do not fall into, and liquids would not be spilled

through, the enclosure's openings.

9. The product should be serviced by qualified service personnel if:

The power supply cord or the plug has been damaged.

Objects have fallen into or liquid has been spilled on the product.

The product has been exposed to rain.

The product has been dropped or the enclosure damaged.

10. There are some areas with high voltage inside, to reduce the risk of electric shock do not

remove cover of the amplifier. The cover should be removed by the qualified personnel only.

No user serviceable parts inside.

CONTENTS:

Before you start

Introductions 4

Features 4

Operation

Front panel 5

Rear panel 5

Function description 6

Output terminal 9

RJ45 connector’s pinout 9

Controls and connectors

Connectors 10

Cable wiring examples 10

Block diagram 13

Specifications

General specifications 14

Introduction

MMA five zone mixing amplifiers for commercial and industrial applications. Possibility to plug in music

source module, 5 zone speaker lines, connector for page station 5 microphone, zone selecting, and low

impedance speaker line, variety of microphone and line inputs makes these units universal for any kind

of installation.

Features

Six microphone inputs with gain control

Ready to plug in music source module

Ready for paging microphone Page station 5

Priority input with priority on/off switch

Phantom power. Switchable on first two XLR inputs separately

Chime

Graphic equalizer

LINK IN, LINK OUT, AMP IN and PRE-AMP OUT conectors

External conector for chime activation

Front Panel

1. Front panel microphone input

2. Slot for music source module

3. Input volume control

4. Siren switch

5. Master volume control

6. Chime switch

7. All zone selection switch

8. Zone selection switch

9. Equalizer

10. Power switch

11. Power indicator

12. Signal indicator

13. Protect indicator

Rear Panel

1. Main power connector

2. AC fuse holder

3. Amplifiers output

4. Impedance selector

5. Connector for page station 5 microphone

6. Antenna connectors

7. AMP IN and PRE-AMP OUT connectors

8. LINK IN and LINK OUT connectors

9. Chime/Siren level control

10.Remote microphone gain control

11.Remote microphone connector

12.Chime connector

13.Microphone input in parallel to stereo RCA

14.XLR microphone input

15.Gain control

16.Phantom power switch

17.Priority switch

Functions description

FRONT PANEL MICROPHONE INPUT

This balanced 6,3mm jack input is in parallel to first microphone input in the rear panel. The gain and

phantom power for this input are selected by using gain control knob and phantom power switch located

in the rear panel. Please note: don’t use front and rear first microphone input at the same time.

SLOT FOR MUSIC SOURCE MODULE

This slot is designed to install music source module to MMA 120X or MMA240X amplifiers. Please find

installation manual in page 8.

INPUT VOLUME CONTROL

These rotary knobs are for adjusting volume level of the audio inputs. All balanced XLR inputs are suitable for

line level as well as microphone level audio signals, if corresponding input gain is adjusted. The input gain

control is located in the rear panel. The phantom power and priority can be activated for first two inputs

separately in rear panel too.

SIREN SWITCH

There is designed siren sound generator inside the amplifier. Press the siren button located in the front panel

to activate it. Siren level can be adjusted by using Chime/Siren level control located in the rear panel.

MASTER VOLUME CONTROL

This knob is designed to adjust main volume of the amplifier.

CHIME SWITCH

There is designed chime sound generator inside the amplifier. Press the chime button located in the front

panel to activate it. Chime level can be adjusted by using Chime/Siren level control located in the rear panel.

ALL ZONE SELECTION SWITCH

This switch activates all zones for broadcasting announcement or background music.

ZONE SELECTION SWITCH

These switches controls amplifier’s output in order to broadcast announcement or background music to the

desired zone.

EQUALIZER

Graphic equalizer allows to adjust sound frequency at 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, and 8kHz points

in ±12 dB range.

POWER SWITCH

Use this switch to power on or off the amplifier. The power LED in the front panel lights up if the amplifier

is powered on.

POWER INDICATOR

This LED indicates status of the main power. The LED lights up if the amplifier is powered on.

SIGNAL INDICATOR

LED in the front panel indicates audio signal of the amplifier.

PROTECT INDICATOR

This LED lights up for a few seconds after the MMA 120X or MMA 240X is powered on and then turns off if

the amplifier is not damaged. It is normal for the protection LED to fade slowly when the amplifier is

powered off.

MAIN POWER CONNECTOR

Power connector is designed for main powers connecting to amplifier. This connector is combined with fuse

holder.

AC FUSE HOLDER

Please use 2 A, 250 V fuse for amplifier MMA 120X and 4A, 250V fuse for amplifier MMA 240X.

AMPLIFIERS OUTPUT

Use this connector to connect amplifier to the loudspeakers. There are two types of output: Hi-z and Lo-Z.

Hi-z output is designed for loudspeakers with built-in impedance matching transformer. Hi-z output can

be switched by zone selection switch in order to broadcast announcement or background music to the

desired zone.Lo-Z output suitable for speaker without 100V matching transformer.

IMPEDANCE SELECTOR

This switch allows to select “Hi-z or Lo-Z amplifier’s output.

CONNECTOR FOR PAGE STATION 5 MICROPHONE

This connector is suitable for page station 5 microphone. Don’t connect any other devices to this

connector, othervice amplifier and connected device will be damaged.

ANTENNA CONNECTORS

If amplifier is supplied without the music source module, this connector is not installed. Antenna connector is

part of music source module, so connector is included to module package.

AMP IN AND PRE-AMP OUT CONNECTORS

PREAMPLIFIER OUTPUT - line level output directly from unit preamplifier. AMPLIFIER INPUT - line level input

directly to device power amplifier. Preamplifier output and amplifier input are designed to insert signal

processor such as equalizer or limiter. Please note that AMP IN and PRE-AMP are designed before the master

potentiometer, so master doesn’t affect audio level in these connectors. Please check block diagram to find

location where connectors are inserted to amplifiers layout.

LINK IN AND LINK OUT CONNECTORS

LINK OUTPUT - line level output linked from unit preamplifier. LINK INPUT - line level input linked to device

power amplifier. Please note that LINK IN and LINK OUT are designed before the equalizer and master

potentiometer, so equalizer and master don’t affect audio in these connectors. LINK IN and LINK OUT

connectors are suitable to link audio signal from MMA 120X or MMA 240X to another amplifier or to audio

recorded etc. Please check block diagram to find location where connectors are inserted to amplifiers layout.

CHIME/SIREN LEVEL CONTROL

Chime and siren audio level can be adjusted by using Chime/Siren level control.

REMOTE MICROPHONE GAIN CONTROL

This knob allows adjust remote microphone input gain.

REMOTE MICROPHONE CONNECTOR

This is highest priority balanced input for dynamic remote microphone.

CHIME CONNECTOR

This connector designed for external chime activation button. In order to activate chime, connector’s contacts

should by connected with each other for a short time.

MICROPHONE INPUT IN PARALLEL TO STEREO RCA

This is balanced input with 6,3mm jack connector in parallel with stereo RCA. Gain of this input can be

adjusted by using gain control knob located above connectors.

XLR MICROPHONE INPUT

This is balanced input with XLR connector. Gain of this input can be adjusted by using gain control knob

located above connector. The phantom power and priority can be activated for first two inputs separately by

using phantom power and priority switch.

GAIN CONTROL

This control allows you to precisely adjust the input level of the signal arriving at the rear-panel input

connectors. At their fully counterclockwise position input gain is -6 dBu. At fully clockwise position, input

gain is - 50dBu.

PHANTOM POWER SWITCH

Set phantom power switch to “ON” position to activate phantom power to desired input. Maximum phantom

power voltage is +15V. To disable phantom power set switch to “off” position.

PRIORITY SWITCH

Microphone input 1 and input 2 can set as priority input. To activate the priority, please set priority switch to

„on” position. To deactivate set to position „off”.

Music source module installation manual

1. Unplug amplifier from the main power and remove the top and slot covers.

2. Insert module in to amplifier and mount the antenna connector in to rear panel if module have radio

tuner.

3. Connect module cable in free connector located near the module slot in the main amplifier’s PCB.

Antenna cable should be connected to the antenna connector.

4. Fix module with the screws added into the module package and mount top amplifier’s cover.

Output terminal

Hi impedance output

Low impedance output

Please note. Amplifiers output can run only one configuration at the same time. Operating amplifiers

using 4 Ω and 70 or 100 volt concurrently may cause damage to the amplifier or connected

speakers.

18. RJ45 connector’s pinout

Page station 5 connector

Connectors

TS connector

TRS connector

XLR male connector XLR female connector

RCA connector

Cable wiring examples

Cable to balanced input from balanced output. TRS connectors.

Cable to unbalanced input from balanced output. TRS and TS connectors.

Cable to balanced input from unbalanced output. TS and TRS connectors.

Cable to unbalanced input from unbalanced output. TS connectors.

Cable to balanced input from balanced output. XLR connectors.

Cable to unbalanced input from balanced output. XLR and TS connectors.

Cable to balanced input from unbalanced output. TS and XLR connectors.

Cable to balanced input from balanced output. TRS and XLR connectors.

RCA cable.

Cable to unbalanced input from RCA output. RCA and TS connectors.

Cable to balanced input from RCA output. RCA and XLR connectors.

Cable to balanced input from RCA output. RCA and TRS connectors.

Cable to RCA input from balanced output. RCA and XLR connectors.

Cable to RCA input from balanced output. RCA and TRS connectors.

Block diagram

General specifications

MMA 120X

MMA 240X

Power supply

AC 220 V 50 Hz

Output power

120 W

240 W

Phantom power

voltage

15V

Total harmonic

distortions

< 0,5 %

Microphone input

sensitivity

-50dBu – -6 dBu

RCA input sensitivity

-30dBu – 14 dBu

Remote microphone

sensitivity

-40dBu – 0dBu

Link in sensitivity

-17 dBu

Amp in sensitivity

0 dBu

S/N ratio

75 dB

Frequency response

80 Hz – 15 kHz

Equalizer

125Hz,250Hz,500Hz,1kHz,2kHz,4kHz,8kHz ±12dB

Cooling

Convection

Indicators

Power, signal, protection

Output

100 V, 70 V, 8 Ω

Weight

9,76 kg

10,5 kg

Dimensions

420 mm (W) x 88 mm (H) x 320 mm (D)

The specifications above are correct at the time of printing of this manual. For improvement purposes, all

specifications for this unit, including design and appearance, are subject to change without prior notice

NOTES:

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AMC is a registered trademark of AMC Baltic www.amcpro.eu

AMC MMA 120X User manual

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