Inter-m MA-110, MA-110N Operation Manuals

Operation Manual

Digital Amplifier

MA-110/110N

DIGITAL AMPLIFIER

Welcome

Welcome

A personal welcome to you from the management and employees of Inter-M

All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,
and we are delighted you have purchased one of our products.

We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete
satisfaction, we will endeavor to make things right.

Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!

This symbol is intend ed to aler t the user to the

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

presence of uninsulated “dangerous voltage” within
the prod uct’s enclos ure t hat m ay be of suffi cient
magnitude to constitute a risk of electric shock to
persons.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.

DO NOT REMOVE COVER (OR BACK).

O USER-SERVICEABLE PARTS INSIDE.

N

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

ATTENTION : RISQUE DE CHOC ELECTRIQUE

NE PAS QUVRIR

Caution: To prevent electric shock do not use this (polarized) plug with

Attentions: Pour prévenir les chocs électriques ne pas utiliser cette

WARNING

To prevent fire or shock hazard, do not
expose the unit to rain or moisture.

*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.

near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects do
not fall and liquids are not spilled into the enclosure through openings.

*CLASS 2 WIRING (Adjacent to speaker terminal): The speaker output of this apparatus can exceed 10 Watts and could be a shock injury.

Connection to speakers should be performed by a skilled person.
*Do not install this equipment in a confined space such as a book case or similar unit.
*Warning : To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture and objects filled with liquids, such as vases,

should not be placed on this apparatus.
*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.

To completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug from the AC receptacle.

*
*

The mains plug of the power supply cord shall remain readily accessible.

CAUTION

*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing

other than that contained in the operating instructions unless you are qualified to do so.

NOTE
*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment

generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful

interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will

be required to correct the interference at his own expense.

This symbol is intend ed to aler t the user to the
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.

an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.

fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre insérées à fon d sa ns en laisser auc une par tie à
découvert.
Pour deco nnecter comp let ement l ’appareil du reseau
d’alimentation. deconnecter le cordon d’alimentation de la
prise murale.
La prise du reseau d’alimentation doit demeurer aisement
accessible.

DIGITAL AMPLIFIER

Contents

Contents

Unpacking .......................................................................................................................................2

Installation

Environment....................................................................................................................................2

Important Safety Instructions.............................................................................................................2

Features............................................................................................................................................3

Operation ........................................................................................................................................3

Front Panel ......................................................................................................................................4

Rear Panel .......................................................................................................................................5

Connecting Speakers.....................................................................................................................7

Applications ....................................................................................................................................8

Block Diagram ..............................................................................................................................12

Specifications ................................................................................................................................14

Service

Procedures....................................................................................................................................16

Schematic.....................................................................................................................................16

Parts List .......................................................................................................................................16

Variations and Options ...............................................................................................................16

Warranty .......................................................................................................................................16

MA-110/110N

1

DIGITAL AMPLIFIER

S3125A

Unpacking

Unpacking

Although your MA-110/110N is neither complicated nor difficult to operate, we recommend you take a few
minutes to read this brief manual and familiarize yourself with the important information regarding product
features, setup and operation.

As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikely event
the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.

Installation

Installation

Environment

Never place this product in an environment which could alter its performance or reduce its service life. Such
environments usually include high levels of heat, dust, moisture, and vibration.

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.

S3125A

MA-110/110N

2

DIGITAL AMPLIFIER

Features

Features

Features

- COMPACT DESIGN

Easy to install and operate with compact design of 1U size and functions.

- DIGITAL AMPLIFIER CIRCUIT

Take up the Digital Amplifier Circuit with High efficiency of the rated power 100W, High reliability, Low weight
and Low temperature.

- SUPPLY POWER BY SMPS

Take up SMPS (Switching Mode Power Supply) for Low electric power and Low weight.

- VARIOUS INPUT CONTROL FUNCTION

Control the each input channel level using the sound control volume of INPUT 1~3.

- INPUT SIGNAL LEDS

Easy to check the inputted signal to INPUT 1~3.

- TONE CONTROL FUNCTION

Separate Bass(100Hz) and Treble(10kHz) controls to tailor your sound.
Easy to control the tone due to user frequency which is including bass and treble.

- ADDITIONAL FUNCTIONS

Easy to use with the various additional functions including power of phantom MIC, TEL IN.

- PRIORITY MUTING

Adopted the priority muting function which control the other input signal, by TEL IN and INPUT 1 signal and
external MUTE.

- EXTERNAL MUTE FUNCTION

Be able to use external mute when you want to cut off the unit’s output signal from the external equipment.

Operation

Operation

1. Before you plug the power cord to AC outlet, please set the power switch OFF, Tone Control center, and

volume level minimum.

2. Please make sure the speakers and input jacks are properly connected before turn the power switch on.

3. Be sure the AC power is correct voltage before you plug into the power cord.

4. Please push the power switch, then the power input LED is on and the unit will be operated.

5. Please use your own with adjustment the volume using each input volume and master volume, the tone using

the tone control.

MA-110/110N

3

DIGITAL AMPLIFIER

Front Panel

Front Panel

1. MIC INPUT JACK FOR INPUT 1 (6.3ø Phone Jack, Balanced)

This is a 6.3ø jack on the front channel that is very useful for connecting dynamic microphone. When
microphone plugged to the jack, it overrides all the input signals.

2. INPUT SIGNAL LED

These green LEDs flash when signal is present and the input level control to input 1~3 is turned up.

3. INPUT VOLUME

These adjust the Mixing level of input signal of 1~3.

4. TONE CONTROL

These control the bass(100Hz) and treble(10kHz) of the main output signal by ±10dB.

5. MASTER VOLUME

This controls the main output level.

6. POWER SWITCH

This switch turns the power on and off.

7. POWER LED

This LED is on when the amplifier is active and powered.

MA-110/110N

4

Rear Panel

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MODEL NO. MA-110N

D

IGITAL AMPLIFIER

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CLASS 2

WIRING

4Ω

20V

OPTIN49Ω

70V

100Ω
100V

COM CH

SPEAKER

MIC

AUX

MIC

A

UX

(

UNBAL)

INPUT 3

M

IC / AUX

(

BAL)

INPUT 2

M

IC

(

BAL)

INPUT 1

GNDSIG G

--

+ G+

TEL IN
M

UTE

PRIORITY

M

UTE

PHANTOM

M

IC

11 9 10

86 4 5123

7

XLR

Rear Panel

MA-110

MA-110N

DIGITAL AMPLIFIER

1. INPUT 1 TERMINAL

This terminal is for microphone. When connecting to balanced signal, be sure to use balanced cable and
please refer to the following picture when using unbalanced cable.

XLR JACK

※ Locate “Phantom microphone” switch to MIC when using unbalanced cable.

MA-110/110N

5

DIGITAL AMPLIFIER

MIC

M

IC

(BAL)

INPUT 1

-

G+

PHANTOM

MIC

Balanced

Ground

Cold

Hot

Unbalanced

Ground

Hot

- EURO Terminal

2. SELECT SWITCH OF INPUT 1 PHANTOM MIC

This is the switch to select types of microphones. Be able to use either DYNAMIC MIC or CONDENSER MIC,
and the phantom power of +15V is supplied when using the condenser microphone. MIC: For general
dynamic microphones PHANTOM MIC: For condenser microphones

3. THE PRIORITY CONTROL VOLUME OF INPUT 1

Input 1 has priority over input 2~3. Output level of input 2~3 lowers when signal is present on input 1.
Priority mute control volume adjusts the output level on input 2~3.

(Balanced Cable)
Use 3.5mm 3P Euro terminal.

4. INPUT 2 TERMINAL

This terminal is for such devices as microphone, computer, CD player, and DVD player. Please refer to the
following picture about the suitable cables. 6.3ø Phone Jack

※ Please refer to Euro terminal cable manual of input 1 for MA-110N.

5. INPUT 2 LEVEL SELECT SWITCH

This is the switch to adjust level of input 2.

- MIC : For microphones

6. INPUT 3 TERMINAL

AUX input terminal for such devices as microphone, computer, CD player, and DVD player. Please refer to
the following picture about the suitable cables.

MA-110/110N

6

- RCA JACK

3.5ø

AUX

(UNBAL)

INPUT 3

GNDSIG

‘Y’ cable is needed when connecting to computers.

DIGITAL AMPLIFIER

(Unbalanced Cable)
Use stereo audio pin cable.

(Unbalanced Cable)
Use stereo audio pin Y.

- 6.3ø Phone Jack

(Unbalanced Cable)
Use 6.3ø Phone jack cable.

- EURO Terminal

(Unbalanced Cable)
Use 3.3mm 3P Euro Terminal cable.

7. TEL IN TERMINAL

This is the audio input terminal of PBX that can be controlled with master volume control.

8. TEL IN PRIORITY CONTROL VOLUME

TEL IN input signal can be the top priority. TEL IN input has priority over input 1~3. Output level of input
1~3 falls when signal is present on TEL IN. TEL IN mute control volume adjusts the level of output falling on
input 2~3.

9. SPEAKER OUTPUT TERMINAL

This is the terminal for speakers. 4Ω, 70V(49Ω), 100V(100Ω) cannot be used at the same time. It may cause
overload and malfunction.

MA-110/110N

7

DIGITAL AMPLIFIER

4Ω

SPEAKER

8Ω 8Ω

※ Connecting Speakers

efore connecting speakers to MA-110/110N unit, be sure to disconnect the AC power cable.

B

- FOR 100V TERMINAL

※ Make sure that 4Ω output terminal is connected with

OPT-IN terminal.

- FOR 4Ω TERMINAL

- FOR 70V TERMINAL

※ Make sure that 4Ω output terminal is connected with

OPT-IN terminal.

(ONE 4Ω SPEAKER) (TWO 8Ω SPEAKERS)

※ Please make sure not to use 4Ω, 70V, 100V terminals simultaneously.

NOTE : 1. Make certain that the total impedance is not less than the rated impedance indicated.

2. Please make sure not to use 4Ω, 70V, 100V terminals simultaneously.

3. If you’re just dealing with the high impedance terminal, then make sure that 4Ω output terminal is
connected with OPT-IN terminal.

MA-110/110N

8

or

DIGITAL AMPLIFIER

10. EXTERNAL MUTE CONTROL TERMINAL

onnect +, - terminals externally to mute the output signal.

C

11. AC POWER CORD

This is the AC cord for connecting power. Do not bend, pull, twist, heat and cut by force. It may cause
electric shock.

MA-110/110N

9

DIGITAL AMPLIFIER

S

N

AC INPUT

2

20-240V~ 50/60Hz, 30W

TEL IN
MUTE

PRIORITY

MUTE

PHANTOM

M

IC

M

ODEL NO. MA

-

1

10

D

IGITAL AMPLIFIER

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CLASS 2
WIRING

TELEPHONE
INTERFACE

LOW IMPEDANCE
SPEAKER (4Ω)

MUTE

CD PLAYER

PC

MIC

MIC

(-)

(+)

49Ω
70V

100Ω
100V

4Ω
20V

Applications

Applications

MA-110 (Using LOW IMPEDANCE SPEAKER)

※You have to select one between 4Ω and High voltage output.

You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 70V, 100V)
If you do this system will have damaged or work protection.

10

MA-110/110N

S

N

A

C INPUT

220-240V~ 50/60Hz, 30W

T

EL IN

M

UTE

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RIORITY

M

UTE

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HANTOM

MIC

M

ODEL NO. MA

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10

DIGITAL AMPLIFIER

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LASS 2

WIRING

TELEPHONE
INTERFACE

MUTE

CD PLAYER

PC

MIC

MIC

(-)

(+)

HIGH IMPEDANCE
SPEAKER
(70V/49Ω)
(100V/100Ω)

49Ω
70V

100Ω
100V

4Ω
20V

MA-110 (Using HIGH IMPEDANCE SPEAKER)

DIGITAL AMPLIFIER

※You have to select one between 4Ω and High voltage output.

You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 70V, 100V)
If you do this system will have damaged or work protection.

MA-110/110N

11

DIGITAL AMPLIFIER

S

N

AC INPUT

2

20-240V~ 50/60Hz, 30W

M

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-

1

10N

D

IGITAL AMPLIFIER

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UTE

CLASS 2
WIRING

4Ω
20V

OPTIN49Ω

70V

100Ω
100V

COM C H

SPEAKER

MIC

A

UX

MIC

A

UX

(UNBAL)

INPUT 3

M

IC / AUX

(BAL)

INPUT 2

M

IC

(BAL)

INPUT 1

GNDSIG G

-

-

+ G+

TEL IN
M

UTE

PRIORITY

M

UTE

P

HANTOM

M

IC

TELEPHONE
INTERFACE

MUTE

CD PLAYER

PC

MIC

MIC

LOW IMPEDANCE
SPEAKER (4Ω)

(-)

(+)

MA-110N (Using LOW IMPEDANCE SPEAKER)

※You have to select one between 4Ω and High voltage output.

You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 70V, 100V)
If you do this system will have damaged or work protection.

12

MA-110/110N

S

N

A

C INPUT

220-240V~ 50/60Hz, 30W

MODEL NO. MA-110N

DIGITAL AMPLIFIER

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I

N

EXT

M

UTE

CLASS 2

WIRING

4Ω
20V

OPTIN49Ω

70V

100Ω
100V

COM C H

SPEAKER

M

IC

A

UX

M

IC

AUX

(

UNBAL)

INPUT 3

MIC / AUX

(

BAL)

INPUT 2

MIC

(

BAL)

INPUT 1

GNDSIG G

--

+ G+

T

EL IN

M

UTE

P

RIORITY

M

UTE

PHANTOM

M

IC

TELEPHONE
INTERFACE

MUTE

CD PLAYER

PC

MIC

MIC

(-)

(+)

HIGH IMPEDANCE
SPEAKER
(70V/49Ω)
(100V/100Ω)

MA-110N (Using HIGH IMPEDANCE SPEAKER)

DIGITAL AMPLIFIER

※You have to select one between 4Ω and High voltage output.

You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 70V, 100V)
If you do this system will have damaged or work protection.

MA-110/110N

13

DIGITAL AMPLIFIER

+35

-35

SMPS

+35+15

MUTE

100V

70V

OPT IN

4ohm

COM

-

@<5=<-

TEL IN

0.775V/10k

+HG

TONE CONTROL

INPUT 1 LED

INPUT 2 LED

INPUT 3 LED

AC 100-120V, 50/60Hz

AC 220-240V, 50/60Hz

POWER

POWER S/W

MIC1

-50dBV/2k

Front Phone Jack

Rear XLR Jack

PHANTOM

POWER

MIC2/AUX1

-50dBV/2k

-10dBV/20k

AUX2

-10dBV/10k

TEL

Priority

MIC 1

Priority

PA

VOL 1

VOL 2

VOL 3

TEL LEVEL

MASTER VOL

LIMTER

CIRCUIT

INPUT 1

INPUT 2

INPUT 3

OPT

-35-15

REG

REG

POWER LED

-15

BASS TREBLE

100Hz 10kHz

LEVEL

SENSING

FUSE

T3.1 5A/250V

SLVS

TSRSSLVTR

CON201

PHONE06P

Block Diagram

Block Diagram

MA-110

14

MA-110/110N

-@<5=<-

TEL IN

0.775V/10k

+HG

MIC1

-50dBV/2k

Front Phone Jack

PHANTOM

POWER

MIC2/AUX1

-50dBV/2k

-10dBV/20k

AUX2

-10dBV/10k

+

+

+

-

-

-

G

G

G

+35

-35

SMPS

+35+15

MUTE

100V

70V

OPT IN

4ohm

COM

TONE CONTROL

INPUT 1 LED

INPUT 2 LED

INPUT 3 LED

AC 100-120V, 50/60Hz

AC 220-240V, 50/60Hz

POWER

POWER S/W

TEL

Priority

MIC 1

Priority

PA

VOL 1

VOL 2

VOL 3

TEL LEVEL

MASTER VOL

LIMTER

CIRCUIT

INPUT 1

INPUT 2

INPUT 3

OPT

-35-15

REG

REG

POWER LED

-15

BASS TREBLE

100Hz 10kHz

LEVEL

SENSING

FUSE

T3.1 5A/250V

SLVS

TSRSSLVTR

CON201

PHONE06P

MA-110N

DIGITAL AMPLIFIER

MA-110/110N

15

DIGITAL AMPLIFIER

Specifications

Specifications

MA-110 / MA-110N

Rated Output Power 100W

Speaker Output Power / Impedance 20V/4Ω, 70V/49Ω, 100V/100Ω

INPUT 1 -50dBV / 2kΩ

INPUT 2(MIC) -50dBV / 2kΩ

* 0dBV = 1.0Vrms

Input Sensitivity / Impedance

Frequency Response (@ 1W, 4Ω) 80Hz ~ 18kHz

THD (@ 1kHz Rated Output) Less than 1% at 100W(with AES-17 filter)

S/N

Tone Control

Operating Temperature -10°C ~ +40°C

Power Source AC 220–240V, 50/60Hz

Power Consumption 30W

Weight (Set) 3.05kg/6.7lb

Dimensions (Set) 300(W) x 44(H) x 230(D)mm/11.8(H) x 1.7(H) x 9.1(D)in

INPUT 2(LINE) -10dBV / 20kΩ

INPUT 3 -10dBV / 10kΩ

TEL IN 0.775 / 10kΩ

INPUT 1,2 Better than 60dB

INPUT 3, TEL IN Better than 70dB

BASS (100Hz) ±10dB

TREBLE (10kHz) ±10dB

* Design and specification are subject to be changed for the improvement of product quality without pre notice.

※Remark: 1. All specifications are measured with AES-17 filter.

2. This sytem is used digital Amplifier (PWM Modulation) so the PWM leakage signal will appear to
output terminal, but it doesn’t matter. You can’t hear the PWM leakage sound because of PWM
frequencies is very higher than Audio frequencies.

16

MA-110/110N

※ DIMENSIONS

DIGITAL AMPLIFIER

MA-110/110N

17

DIGITAL AMPLIFIER

Service

Service

Procedures

Take steps to insure the problem is not related to operator error or other products within the system. Information
provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is related to the product contact your warranty provider as described in the warranty section of this
manual.

Schematic

A Schematic is available by contacting your warranty provider.

Parts List

A Parts List is available by contacting your warranty provider.

Variations and Options

Variations and Options

Variations

Products supplied through legitimate sources are compatible with local AC power requirements.

Options

No optional items are available for this product.

Warranty

Warranty

Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditions
of warranty for a given product may be determined first by locating the appropriate country which the product
was purchased in, then by locating the product type.

To obtain specific warranty information and available service locations contact Inter-M directly or the
authorized Inter-M Distributor for your specific country or region.

18

MA-110/110N

NOTE

NOTE

20

MA-110/110N

Inter-M, Ltd. (Korea) began operations in 1983.

Since then, Inter-M has grown to become one of the largest manufacturers
of professional audio and commercial sound electronics equipment in the world.

Inter-M has gained worldwide recognition for its own branded products,
as well as private label manufacturing of electronics sold under other names (OEM).

The company is no longer just a Korean company, but rather a global company
that is truly international in scope, with factories and offices in Korea and China,
and sales and marketing operations located in Japan, Europe, and the U.S.A.

With more than 850 employees around the globe,
Inter-M is well-poised for further growth and expansion.

Inter-M Americas, INC.

5666 CORPORATE AVE. CYPRESS, CA 90630
TEL : [phone], FAX : [phone]
Home Page : http://www.inter-m.net, E-mail : [e-mail]

Inter-M Corporation

SEOUL OFFICE : 719, DOBONG-RO, DOBONG-GU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [e-mail]

MADE IN KOREA

September 2016 141131