Inter-m MA-110N User manual

Operation Manual
Digital Amplifier
MA-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 e icate to provi ing excellent pro ucts with inherently goo value,
an we are elighte you have purchase one of our pro ucts.
We sincerely trust this pro uct will provi e years of satisfactory service, but if anything is not to your complete
satisfaction, we will en eavor to make things right.
Welcome to Inter-M, an thank you for becoming part of our worl wi e exten e 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.
A EN ION : RISQUE DE CHOC ELEC RIQUE
NE PAS QUVRIR
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.
*CLASS 2 WIRING (Adjacent to speaker terminal): he 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 : o 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.
* his apparatus shall be connected to a mains socket outlet with a protective earthing connection.
*
o completely disconnect this apparatus from the AC mains, disconnect the power supply cord plug from the AC receptacle.
* he mains plug of the power supply cord shall remain readily accessible.
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.
Pour deconnecter completement 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
1
MA-110N
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 ................................................................................................................................13
Service
Proce ures....................................................................................................................................15
Schematic.....................................................................................................................................15
Parts List .......................................................................................................................................15
Variations and Options ...............................................................................................................15
Warranty .......................................................................................................................................15

DIGITAL AMPLIFIER
2MA-110N
Installation
Unpacking
Unpacking
Although your MA-110N is neither complicate nor ifficult to operate, we recommen you take a few minutes
to rea this brief manual an familiarize yourself with the important information regar ing pro uct features,
setup an operation.
As with most electronic evices, we strongly recommen you retain the original packaging. In the unlikely event
the pro uct must be returne for servicing, the original packaging (or reasonable equivalent) is require .
Installation
Environment
Never place this pro uct in an environment which coul alter its performance or re uce its service life. Such
environments usually inclu e high levels of heat, ust, moisture, an vibration.
IMPORTANT SAFETY INSTRUCTIONS
1. Rea these instructions.
2. Keep these instructions.
3. Hee all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with ry cloth.
7. Do not block any ventilation openings. Install in accor ance with the manufacturer’s instructions.
8. Do not install near any heat sources such as ra iators, heat registers, stoves, or other apparatus (inclu ing
amplifiers) that pro uce heat.
9. Do not efeat the safety purpose of the polarize or groun ing-type plug. A polarize plug has two bla es
with one wi er than the other. A groun ing type plug has two bla es an a thir groun ing prong. The wi e
bla e or the thir prong are provi e for your safety. If the provi e plug oes not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cor from being walke on or pinche particularly at plugs, convenience receptacles, an
the point where they exit from the apparatus.
11. Only use attachments/accessories specifie by the manufacturer.
12. Use only with the cart, stan , tripo , bracket, or table specifie by the manufacturer, or sol with the apparatus.
When a cart is use , use caution when moving the cart/apparatus combination to avoi injury from tip-over.
13. Unplug this apparatus uring lightning storms or when unuse for long perio s of time.
14. Refer all servicing to qualifie service personnel. Servicing is require when the
apparatus has been amage in any way, such as power-supply cor or plug is
amage , liqui has been spille or objects have fallen into the apparatus, the
apparatus has been expose to rain or moisture, oes not operate normally, or has
been roppe .
S3125A
S3125A

DIGITAL AMPLIFIER
3
MA-110N
Features
Features
Features
- COMPACT DESIGN
Easy to install an operate with compact esign of 1U size an functions.
- DIGITAL AMPLIFIER CIRCUIT
Take up the Digital Amplifier Circuit with High efficiency of the rate power 100W, High reliability, Low weight
an Low temperature.
- SUPPLY POWER BY SMPS
Take up SMPS (Switching Mo e Power Supply) for Low electric power an Low weight.
- VARIOUS INPUT CONTROL FUNCTION
Control the each input channel level using the soun control volume of INPUT 1~3.
- INPUT SIGNAL LEDS
Easy to check the inputte signal to INPUT 1~3.
- AUTOMATIC SLEEP MODE
Minimize power consumption an life span of the parts is lengthene . Without any input signal for over to
minutes, the pro uct switches it’s mo e to sleep mo e an with signal, it reactivates in 0.5 secon s.
- TONE CONTROL FUNCTION
Separate Bass(100Hz) an Treble(10kHz) controls to tailor your soun .
Easy to control the tone ue to user frequency which is inclu ing bass an treble.
- ADDITIONAL FUNCTIONS
Easy to use with the various a itional functions inclu ing power of phantom MIC, TEL IN.
- PRIORITY MUTING
A opte the priority muting function which control the other input signal, by TEL IN an INPUT 1 signal an
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 cor to AC outlet, please set the power switch OFF, Tone Control center, an
volume level minimum.
2. Please make sure the speakers an input jacks are properly connecte before turn the power switch on.
3. Be sure the AC power is correct voltage before you plug into the power cor .
4. Please push the power switch, then the power input LED is on an the unit will be operate .
5. Please use your own with a justment the volume using each input volume an master volume, the tone using
the tone control.

DIGITAL AMPLIFIER
4MA-110N
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 ynamic microphone. When
microphone plugge to the jack, it overri es all the input signals.
2. INPUT SIGNAL LED
These green LEDs flash when signal is present an the input level control to input 1~3 is turne up.
※Automatic Sleep Function
Without any input signal for over 5 minutes, the pro uct switches its mo e to sleep mo e an with signal, it
reactivates in 0.5 secon s.
3. INPUT VOLUME
These a just the Mixing level of input signal of 1~3.
4. TONE CONTROL
These control the bass(100Hz) an treble(10kHz) of the main output signal by ±10 B.
. MASTER VOLUME
This controls the main output level.
6. POWER SWITCH
This switch turns the power on an off.
7. POWER LED
This LED is on when the amplifier is active an powere .

DIGITAL AMPLIFIER
MA-110N
Rear Panel
Rear Panel
1.. INPUT 1 TERMINAL
This terminal is for microphone. When connecting to balance signal, be sure to use balance cable an
please refer to the following picture when using unbalance cable.
(Balance Cable)
Use 3.5mm 3P Euro terminal.
(Unbalance Cable)
Use 3.5mm 3P Euro terminal.
※Locate “Phantom microphone” switch to MIC when using unbalance cable.
SN
ACINPUT
220-240V~50/60Hz,30W
MODELNO.MA
-
110N
DIGITALAMPLIFIER
܆Ͽࠤ@Z@ؠ܄ÿ۾ؖ@Z@220-240V~50/60Hz
؎۾ېݕ@Z@MSIP-REM-IMK-MA-110
܆ܖۜϿ@Z@ЂʠϿ@Z@MA-110N
ďÖݖڜࣶ@TEL:[phone]
-
+
TEL
IN
EXT
MUTE
CLASS2
WIRING
4Ω
20VOPT
IN6.9Ω
25V49Ω
70V
COMCH
SPEAKER
MIC
AUXMIC
AUX
(UNBAL)
INPUT3
MIC/AUX
(BAL)
INPUT2
MIC
(BAL)
INPUT1
GND
SIGG
- -
+G+
TEL IN
MUTE
PRIORITY
MUTE
PHANTOM
MIC
11 910
8 6 45 1 2 3
7
@@@@
@@@@@@@
MIC
MIC
(BAL)
INPUT 1
-
G+
PR
PHANTOM
MIC
@@@@
@@@@@@@
MIC
MIC
(BAL)
INPUT 1
-
G+
PR
PHANTOM
MIC

DIGITAL AMPLIFIER
6MA-110N
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,
an the phantom power of +15V is supplie when using the con enser microphone. MIC: For general
ynamic microphones PHANTOM MIC: For con enser 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 a justs the output level on input 2~3.
4. INPUT 2 TERMINAL
This terminal is for such evices as microphone, computer, CD player, an DVD player. Please refer to the
following picture about the suitable cables.
(Balance Cable)
Use 3.5mm 3P Euro terminal.
(Unbalance Cable)
Use 3.5mm 3P Euro terminal.
. INPUT 2 LEVEL SELECT SWITCH
This is the switch to a just level of input 2.
- MIC: For microphones
- AUX: For such evices as microphone, computer, CD player, an DVD player.
6. INPUT 3 TERMINAL
AUX input terminal for such evices as microphone, computer, CD player, an DVD player. Please refer to
the following picture about the suitable cables.
- RCA JACK
(Unbalance Cable)
Use stereo au io pin cable.
@@@@
@@@@@@@
MIC
AUX
MIC / AUX
(BAL)
INPUT 2
G
-
+
@@@@
@@@@@@@
MIC
AUX
MIC / AUX
(BAL)
INPUT 2
G
-
+

DIGITAL AMPLIFIER
7
MA-110N
‘Y’ cable is nee e when connecting to computers.
(Unbalance Cable)
Use stereo au io pin Y.
- EURO Terminal
(Unbalance Cable)
Use 3.3mm 3P Euro Terminal cable.
7. TEL IN TERMINAL
This is the au io input terminal of PBX that can be controlle 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 a justs 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 use at the same time. It may
cause overloa an malfunction.
3.5ø
@@@@
@@@@@@@
AUX
(UNBAL)
INPUT 3
GNDSIG

DIGITAL AMPLIFIER
8MA-110N
※Connecting Speakers
Before connecting speakers to MA-110N unit, be sure to isconnect the AC power cable.
NOTE : 1. Make certain that the total impe ance is not less than the rate impe ance in icate .
2. Please make sure not to use 4Ω, 25V, 70V terminals simultaneously.
3. If you’re just ealing with the high impe ance terminal, then make sure that 4Ω output terminal is
connecte with OPT-IN terminal.
4Ω
SPEAKER 8Ω 8Ω
6.9Ω
25V
49Ω
70V
- FOR 70V TERMINAL
- FOR 4Ω TERMINAL
- FOR 25V TERMINAL
6.9Ω
25V
49Ω
70V
6.9Ω
6.9Ω
25V
49Ω
70V
49Ω
(ONE 4Ω SPEAKER) (TWO 8Ω SPEAKERS)
or
※Please make sure not to use 4Ω, 25V, 70V terminals simultaneously.
※Make sure that 4Ω output terminal is connecte with
OPT-IN terminal.
※Make sure that 4Ω output terminal is connecte with
OPT-IN terminal.

DIGITAL AMPLIFIER
9
MA-110N
10. EXTERNAL MUTE CONTROL TERMINAL
Connect +, - terminals externally to mute the output signal.
11. AC POWER CORD
This is the AC cor for connecting power. Do not ben , pull, twist, heat an cut by force. It may cause
electric shock.

Applications
Applications
DIGITAL AMPLIFIER
10 MA-110N
SN
AC INPUT
220-240V~ 50/60Hz, 30W
MODEL NO. MA - 110N
DIGITAL AMPLIFIER
܆Ͽࠤ@Z@ؠ܄ÿ۾ؖ@Z@220-240V~ 50/60Hz
؎۾ېݕ@Z@MSIP-REM-IMK-MA-110
܆ܖۜϿ@Z@ЂʠϿ@Z@MA-110N
ďÖݖڜࣶ@TEL : [phone]
- +
TEL
IN
EXT
MUTE
CLASS 2
WIRING
4Ω
20V OPT IN 6.9Ω 25V 49Ω 70V
COM CH
SPEAKER
MIC
AUX MIC
AUX
(UNBAL)
INPUT 3
MIC / AUX
(BAL)
INPUT 2
MIC
(BAL)
INPUT 1
GNDSIG G
--
+G+
TEL IN
MUTE
PRIORITY
MUTE
PHANTOM
MIC
TELEPHONE
INTERFACE
MUTE
CD PLAYER
PC
MIC
MIC
LOW IMPEDANCE
SPEAKER (4Ω)
( - )(+)
※You have to select one between 4Ω an High voltage output.
You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 25V, 70V)
If you o this system will have amage or work protection.
USING LOW IMPEDANCE SPEAKER

DIGITAL AMPLIFIER
11
MA-110N
SN
AC INPUT
220-240V~ 50/60Hz, 30W
MODEL NO. MA - 110N
DIGITAL AMPLIFIER
܆Ͽࠤ@Z@ؠ܄ÿ۾ؖ@Z@220-240V~ 50/60Hz
؎۾ېݕ@Z@MSIP-REM-IMK-MA-110
܆ܖۜϿ@Z@ЂʠϿ@Z@MA-110N
ďÖݖڜࣶ@TEL : [phone]
- +
TEL
IN
EXT
MUTE
CLASS 2
WIRING
4Ω
20V OPT IN 6.9Ω 25V 49Ω 70V
COM CH
SPEAKER
MIC
AUX MIC
AUX
(UNBAL)
INPUT 3
MIC / AUX
(BAL)
INPUT 2
MIC
(BAL)
INPUT 1
GNDSIG G
--
+G+
TEL IN
MUTE
PRIORITY
MUTE
PHANTOM
MIC
TELEPHONE
INTERFACE
MUTE
CD PLAYER
PC
MIC
MIC
( - )(+)
HIGH IMPEDANCE
SPEAKER
(25V/6.9Ω)
(70V/49Ω)
※You have to select one between 4Ω an High voltage output.
You never use both 4Ω with High voltage output at the same time.
Please use only one output terminal. (4Ω, 25V, 70V)
If you o this system will have amage or work protection.
USING HIGH IMPEDANCE SPEAKER

DIGITAL AMPLIFIER
12 MA-110N
Block Diagram
Block Diagram
- @<5=<- TEL IN 0.775V/10k
+ H G
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
TS RS SLV T R
CON201
PHONE06P

DIGITAL AMPLIFIER
13
MA-110N
* Design an specification are subject to be change for the improvement of pro uct quality without pre notice.
※Remark: 1. All specifications are measure with AES-17 filter.
2. This sytem is use igital Amplifier (PWM Mo ulation) so the PWM leakage signal will appear to
output terminal, but it oesn’t matter. You can’t hear the PWM leakage soun because of PWM
frequencies is very higher than Au io frequencies.
Specifications
Specifications * 0 BV = 1.0Vrms
MA-110N
Rate Output Power /
Speaker Output Power / Impe ance 100W/20V/4Ω, 90W/25V/6.9Ω, 100W/70V/49Ω
Input Sensitivity / Impe ance
INPUT 1 -50 BV / 2kΩ
INPUT 2(MIC) -50 BV / 2kΩ
INPUT 2(LINE) -10 BV / 20kΩ
INPUT 3 -10 BV / 10kΩ
TEL IN 0.775 / 10kΩ
Frequency Response (@ 1W, 4Ω) 80Hz ~ 18kHz
THD (@ 1kHz Rate Output) Less than 1% at 100W(with AES-17 filter)
S/N INPUT 1,2 Better than 60 B
INPUT 3, TEL IN Better than 70 B
Tone Control BASS (100Hz) ±10 B
TREBLE (10kHz) ±10 B
Operating Temperature -10°C ~ +40°C
Power Source AC 120V, 60Hz
Power Consumption 35W
Power Consumption (Sleep Mo e) 7W
Weight 3.05kg/6.7lb
Dimensions 300(W) x 44(H) x 230(D)mm/11.8(H) x 1.7(H) x 9.1(D)in

DIGITAL AMPLIFIER
14 MA-110N
※ DIMENSIONS

DIGITAL AMPLIFIER
1
MA-110N
Service
Service
Procedures
Take steps to insure the problem is not relate to operator error or other pro ucts within the system. Information
provi e in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is relate to the pro uct contact your warranty provi er as escribe in the warranty section of this
manual.
Schematic
A Schematic is available by contacting your warranty provi er.
Parts List
A Parts List is available by contacting your warranty provi er.
Variations and Options
Variations and Options
Variations
Pro ucts supplie through legitimate sources are compatible with local AC power requirements.
Options
No optional items are available for this pro uct.
Warranty
Warranty
Warranty terms an con itions vary by country an may not be the same for all pro ucts. Terms an con itions
of warranty for a given pro uct may be etermine first by locating the appropriate country which the pro uct
was purchase in, then by locating the pro uct type.
To obtain specific warranty information an available service locations contact Inter-M irectly or the
authorize Inter-M Distributor for your specific country or region.

16 MA-110N
NOTE

MADE IN KOREA
October 2015 138520
Inter-M, Lt . (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional au io an commercial soun electronics equipment in the worl .
Inter-M has gaine worl wi e recognition for its own bran e pro ucts,
as well as private label manufacturing of electronics sol un er 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 an offices in Korea an China,
an sales an marketing operations locate in Japan, Europe, an the U.S.A.
With more than 850 employees aroun the globe,
Inter-M is well-poise for further growth an 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 : 719, DOBONG-RO, DOBONG-GU, SEOUL, KOREA
TEL : [phone]~8, FAX : [phone]
Home Page : http://www.inter-m.com, E-mail : [email protected]