Inter-m MA-106N User manual

Operation Manual
Public Address Amplifier
MA-106N

PUBLIC ADDRESS 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!
RISK OF ELEC RIC SHOCK
DO NO OPEN
CAutION
CAU ION: O REDUCE HE RISK OF ELEC RIC SHOCK.
DO NO REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PAR S INSIDE.
REFER SERVICING O QUALIFIED SERVICE PERSONNEL.
WARNING
o prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WARNING FOR YOUR PRO EC ION PLEASE READ HE FOLLOWING-WA ER AND MOIS URE: 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.
*Do not install this equipment in a confined space such as a book case or similar unit.
* his apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
* his apparatus shall be connected to a mains socket outlet with a protective earthing connection.
*
It has heed to be easy to disconnect the device. o disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.
CAutION
* hese servicing instructions are for use by qualified service personnel only. o 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
*his 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. hese limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. his 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.
his symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
his symbol is intended to alert the user to the
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.
Caution: o prevent electric shock do not use this (polarized) plug with
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre insérées à fond sans en laisser aucune partie à
découvert.

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MA-106N
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 ................................................................................................................................9
Specifications ................................................................................................................................10
Service
Procedures....................................................................................................................................12
Schematic.....................................................................................................................................12
Parts List .......................................................................................................................................12
Variations and Options ...............................................................................................................12
Warranty .......................................................................................................................................12

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Installation
Unpacking
Unpacking
Although your MA-106N 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
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
S3125A

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MA-106N
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 60W 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.
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.

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Front Panel
Front Panel
1. MIC INPUT JACK FOR INPUT 1 (6.3ø Phone Jack, Balanced)
This input allow you to connect balanced 6.3ø Phone Jack plugs.
If this input is connected Turn the inputting signal to INPUT 1 on the rear panel off.
2. INPUT SIGNAL LED
The SIGNAL LED is lighting by input signal of INPUT 1~3.
3. INPUT VOLUME
These knobs control the volume level of INPUT 1~3.
4. TONE CONTROL
These knobs provide continuous control of the high (10kHz) and low (100Hz) frequency response by
adding up to 12dB of cut (decrease) or boost (increase).
. MASTER VOLUME LEVEL
This knob provides continuous control of the controlled overall signal level by each volume.
6. POWER LED
Display the power ON/OFF.
7. POWER SWITCH (PUSH TYPE)
Pressing the power switch turns the unit on. Pressing it again turns off.
* This switch makes up that one pole be cut off when power is off.

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Rear Panel
Rear Panel
1. AC POWER CORD
Connect this cable to an AC outlet.
2. SPEAKER OUTPUT TERMINAL
These terminals are used to connect speakers to the unit. You may select 4Ω conventional operation or high
impedance operation at either 70V/82Ω or 100V/167Ω.
(USA/CANADA & Associated : 25V/10.5Ω or 70V/82Ω)
Can’t use these terminals at the same time.
NOTE: The unit is disable to operate in case of the total impedance is less than the rated impedance
indicated. (If you’re running speakers you have to make sure total impedance does not go below
the rated impedance.)
3. EXTERNAL MUTE CONTROL TERMINAL
Be able to use this terminal when you want to cut off the unit’s output signal from the external equipment.
4. TEL IN TERMINAL
This is the audio signal input terminal of switchboard.
If the signal is inputted to the terminal you are able to control the output of other input signals by the priority
control volume of TEL IN.
. TEL IN PRIORITY CONTROL VOLUME
This is able to control the mute level of INPUT 1~3 when the signal is inputted from the TEL IN terminal.
6. INPUT 3 TERMINAL
This is an unbalanced input terminal and connected with the external units.(CD DVD computer etc.)
If you connect with computer ‘Y’ jacks are required.
- Euro Block : Unbalanced
- RCA : Unbalanced
SIG GND
+ - G + - G
1234
567 8910 11

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7. INPUT 2 TERMINAL
This is a balanced input terminal and connected with the mic signal or the external units.
8. INPUT 2 LEVEL SELECT SWITCH
This switch selects the input signal of INPUT 2.
9. INPUT 1 TERMINAL OF REAR PANEL
This is a balanced Euro Block input terminal that the signal is inputted.
If the front panel’s MIC input terminal is connected with 6.3ø Phone Jack the rear panel’s MIC input terminal
don’t output the signal.
10. SELECT SWITCH OF INPUT 1 PHANTOM MIC
This switch selects a kind of INPUT 1’s MIC on the rear panel.
Be able to use either DYNAMIC MIC or CONDENSER MIC and the phantom power of +15V is supplied
when using the condenser mic.
MIC : Select in case of using a general dynamic mic
PHANTOM MIC : Select in case of using a condenser mic
11. THE PRIORITY CONTROL VOLUME OF INPUT 1
The output of INPUT 2 3 is controlled by the priority control volume of INPUT 1 when the signal is inputted to
the INPUT 1 terminal.

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MA-106N
Connecting Speakers
Connecting Speakers
Before connecting speakers to MA-106N unit be sure to disconnect the AC power cable.
NOTE : 1. Make certain that the total impedance is not less than the rated impedance indicated.
2. Don’t have to use several speaker terminals at the same time.
3. If you’re just dealing with the high impedance terminal then make sure that 4Ω output terminal is
connected with OPT-IN terminal.
4Ω
SPEAKER 8Ω8Ω
- FOR 70V TERMINAL - FOR 100V TERMINAL
(ONE 4Ω SPEAKER) (TWO 8Ω SPEAKERS)
- FOR 4Ω TERMINAL
*3*3

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Applications
Applications
SIG GND
+ - G + - G
※You have to select one between 4Ω and High voltage output.
You never use both 4Ω with High voltage output at the same time.
If you do this system will have damaged or work protection.

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MA-106N
Block Diagram
Block Diagram

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Specifications
Specifications
MA-106N
Rated Output Power 60W
Speaker Output Power / Impedance 15.5V/4Ω 25V/10.5Ω 70V/82Ω 100V/167Ω
Input Sensitivity / INPUT 1 -50dBV / 2kΩ
Impedance INPUT 2(MIC) -50dBV / 2kΩ
INPUT 2(LINE) -10dBV / 20kΩ
INPUT 3 -10dBV / 10kΩ
TEL IN 0.775 / 600Ω
Frequency Response (±3dB) 80Hz ~ 15kHz
T.H.D (at 1kHz Rated Output) Less than 1% at 60W(with AES-17 filter)
S/N INPUT 1 2 Better than 60dB
INPUT 3 TEL IN Better than 70dB
Tone Control BASS (100Hz) ±12dB
TREBLE (10kHz) ±12dB
Operating Temperature -10°C ~ +40°C
Power Source 100–120VAC or 220–240VAC 50/60Hz
(Supplied AC mains depends on country requirements)
Power Consumption 24W
Weight 3.0kg/6.6lb
Dimensions 300(W) x 44(H) x 230(D)mm/11.8(H) x 1.7(H) x 9.1(D)in
* Specifications and design subject to change without 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.
* 0dBV = 1.0Vrms

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※ DIMENSIONS

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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.
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.
Variations and Options
Variations and Options
Variations
Variations of this product exist to reflect the variations in AC power requirements throughout the world. Product
supplied through local sources are compatible with local AC power requirements.
Options
No optional items are available for this product.
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MA-106N

MADE IN KOREA
October 2013 134310
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.
13875 Artesia Blvd. Cerritos CA 90703 USA
TEL : [phone] FAX : [phone]
Home Page : http://www.inter-m.net E-mail : [email protected]
Inter-M Corporation
Seoul OFFICE:653-5 BANGHAK-DONG DOBONG-GU SEOUL KOREA
TEL : [phone]~8 FAX : [phone]
Home Page : http://www.inter-m.com E-mail : [email protected]