Nissindo MA-930 User manual

0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITAL KEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEY CONTROL
MA-930
Extra Echo Effect
Extra Echo
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LO MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LO MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LO MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO DPH LO RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL LAL MID HILO
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MIC MASTER VOL MUSIC MASTER VOL
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITAL KEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEY CONTROL
MA-930
Extra Echo Effect
Extra Echo
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LOW MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LOW MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LOW MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO VOL LOW RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL BAL MID HILOW
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MIC MASTER VOL MUSIC MASTER VOL
Professional Mixing Amplifier
MA-930
Operating Instructions

SAFETY INSTRUCTIONS
1. Read Instructions: All the safety and operation
instructions should be read before this Nissindo
product is operated.
2. Retain Instructions: The safety and operating
instructions should be kept for future reference.
3. Warnings: All warnings on this Nissindo product in
these operating instructions should be followed.
4. Follow Instructions: All operating and other
instructions should be followed carefully.
5. Water and Moisture: This Nissindo product should
not be used near water, for example, near a bathtub,
washbowl, kitchen sink, laundry tub, in a wet
basement, near a swimming pool, swamp or salivating
St. Bernard dog, etc.
6. Cleaning: Clean only with a dry cloth.
7. Ventilation: This Nissindo product should be
situated so that its location or position does not
interfere with its proper ventilation. For example, the
Component should not be situated on a bed, sofa,
rug, or similar surface that may block any ventilation
openings, or placed in a built-in installation such as a
bookcase or cabinet that may impede the flow of air
through ventilation openings.
8. Heat: This Nissindo product should be stay away
from heat sources such as radiators, or other devices
producing heat.
9. Power Sources: This Nissindo product should be
connected to a power supply only of the type
described in these operation instructions or as marked
on this Nissindo product.
10. Power Cord Protection: Power supply cords
should be routed so that they are not likely to be
walked upon or pinched by items placed upon or
against them. Please pay particular attention to cords
at plugs, convenience receptacles, and the point
where they exit this Nissindo product.
11. Object and Liquid Entry: Care should be taken so
that objects do not fall on, or liquids are not spilled
into this Nissindo product.
12. Damage Requiring Service: This Nissindo product
should be serviced only by qualified service personnel
when:
A. The power-supply cord or the plug has been
damaged; or
B. Objects have fallen, or liquid has spilled into
this Nissindo product; or
C. This Nissindo product has been exposed to
rain; or
D. This Nissindo product does not appear to
operate normally or exhibits a marked change in
performance; or
E. This Nissindo product has been dropped, or its
chassis damaged.
13. Servicing: The user should not attempt to service
this Nissindo product beyond those means described
in this operating manual. All other servicing should be
referred to the Nissindo Service Department.
14. To 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.
15. Grounding or Polarization: Precautions should be
taken so that the grounding or polarization means of
this Nissindo product is not defeated.
16. Power Precaution: Unplug this Nissindo product
during lightning storms or when unused for long
periods of time. Note that this Nissindo product is not
completely disconnected from the AC mains service
when the power switch is in the OFF position.
17. This apparatus does not exceed the Class
A/Class B (whichever is applicable) limits for radio
noise emissions from digital apparatus as set out in the
radio interference regulations of the Canadian
Department of Communications.
18. Exposure to extremely high noise levels may cause
permanent hearing loss. Individuals vary considerably
in susceptibility to noise-induced hearing loss, but
nearly everyone will loss some
hearing if exposed to sufficiently intense noise for a
period of time. The U.S. Government's Occupational
Safety and Health Administration (OSHA) have
specified the permissible noise level exposures shown
in the following chart.
According to OSHA, any exposure in excess of
these permissible limits could result in some hearing
loss. To ensure against potentially dangerous exposure
to high sound pressure levels, it is recommended that
all persons exposed to equipment capable of
producing high sound pressure levels use hearing
protectors while the equipment is in operation. Ear
plugs or protectors in the ear canals or over the ears
must be worn when operating the equipment in order
to prevent a permanent hearing loss if exposure is in
excess of the limits set forth here.
AC-Power Sources
This set should be operated only from the type of
power source indicated on the marking label. If you
are not sure of the type of electrical power supplied to
your home, consult your dealer or local power
company. For those sets designed to operate from
battery power, or other sources, refer to the operating
instructions.
Overloading
Do not overload wall outlets, extension cords or
convenience receptacles beyond their capacity, since
this can result in fire or electric shock.
An appliance and cart combination
should be move with care. Quick
stops, excessive force and uneven
surfaces may cause the appliance
and cart combination to overturn.
Accessories
Do not place the set on an unstable cart, stand, tripod,
bracket, or table. The set may fall, causing serious
injury to a child or an adult, and serious damage to
the set. Use only a cart stand tripod, bracket, or table
recommended by the manufacturer.
For the set with a three-wire grounding type ac plug:
This plug will only fit into a grounding-type power
outlet. This is a safety feature. If you are unable to
insert the plug into the outlet, contact your electrician to
have a suitable outlet installed. Do not defeat the
safety purpose of the grounding plug.
CONTENTS
Introduction.................................................4~6
Package accessories........................................ 7
Specifications................................................. 7
Speaker connection......................................... 7
Name and functions of remote controller.............. 8
Features and functions of the amplifier............9~11
Connector information.....................................12
Physical........................................................12
How to connect speaker..................................13
How to connect music A.V. source.................... 13
How to connect record................................... 13
How to connect home theater and karaoke.........14
How to connect microphone............................ 15
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK) NO USER-
SERVICEABLE PARTS INSIDE REFER SERVICING TO
QUALIFIED PERSONNEL
2 3
WARNING- To reduce the risk of fire or electric shock, do not expose
this appliance to rain or moisture.
Duration Per Day
In Hours
8
6
4
3
2
1.5
1
0.5
0.25 or less
Sound Level dBA,
Slow Response
90
92
95
97
100
102
105
110
115
Typical
Example
Duo in small club
Subway Train
Very loud classical music
Patrice screaming at Ron about deadlines
Loudest parts at a rock concert
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITALKEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LO MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LO MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LO MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO DPH LO RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL LAL MID HILO
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MICMASTER VOL MUSIC MASTER VOL
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITAL KEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LO MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LO MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LO MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO DPH LO RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL LAL MID HILO
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MIC MASTER VOL MUSICMASTER VOL
110V AC-POWER
110V AC-POWER
110V AC-POWER CORD INCLUDED

SAFETY INSTRUCTIONS
1. Read Instructions: All the safety and operation
instructions should be read before this Nissindo
product is operated.
2. Retain Instructions: The safety and operating
instructions should be kept for future reference.
3. Warnings: All warnings on this Nissindo product in
these operating instructions should be followed.
4. Follow Instructions: All operating and other
instructions should be followed carefully.
5. Water and Moisture: This Nissindo product should
not be used near water, for example, near a bathtub,
washbowl, kitchen sink, laundry tub, in a wet
basement, near a swimming pool, swamp or salivating
St. Bernard dog, etc.
6. Cleaning: Clean only with a dry cloth.
7. Ventilation: This Nissindo product should be
situated so that its location or position does not
interfere with its proper ventilation. For example, the
Component should not be situated on a bed, sofa,
rug, or similar surface that may block any ventilation
openings, or placed in a built-in installation such as a
bookcase or cabinet that may impede the flow of air
through ventilation openings.
8. Heat: This Nissindo product should be stay away
from heat sources such as radiators, or other devices
producing heat.
9. Power Sources: This Nissindo product should be
connected to a power supply only of the type
described in these operation instructions or as marked
on this Nissindo product.
10. Power Cord Protection: Power supply cords
should be routed so that they are not likely to be
walked upon or pinched by items placed upon or
against them. Please pay particular attention to cords
at plugs, convenience receptacles, and the point
where they exit this Nissindo product.
11. Object and Liquid Entry: Care should be taken so
that objects do not fall on, or liquids are not spilled
into this Nissindo product.
12. Damage Requiring Service: This Nissindo product
should be serviced only by qualified service personnel
when:
A. The power-supply cord or the plug has been
damaged; or
B. Objects have fallen, or liquid has spilled into
this Nissindo product; or
C. This Nissindo product has been exposed to
rain; or
D. This Nissindo product does not appear to
operate normally or exhibits a marked change in
performance; or
E. This Nissindo product has been dropped, or its
chassis damaged.
13. Servicing: The user should not attempt to service
this Nissindo product beyond those means described
in this operating manual. All other servicing should be
referred to the Nissindo Service Department.
14. To 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.
15. Grounding or Polarization: Precautions should be
taken so that the grounding or polarization means of
this Nissindo product is not defeated.
16. Power Precaution: Unplug this Nissindo product
during lightning storms or when unused for long
periods of time. Note that this Nissindo product is not
completely disconnected from the AC mains service
when the power switch is in the OFF position.
17. This apparatus does not exceed the Class
A/Class B (whichever is applicable) limits for radio
noise emissions from digital apparatus as set out in the
radio interference regulations of the Canadian
Department of Communications.
18. Exposure to extremely high noise levels may cause
permanent hearing loss. Individuals vary considerably
in susceptibility to noise-induced hearing loss, but
nearly everyone will loss some
hearing if exposed to sufficiently intense noise for a
period of time. The U.S. Government's Occupational
Safety and Health Administration (OSHA) have
specified the permissible noise level exposures shown
in the following chart.
According to OSHA, any exposure in excess of
these permissible limits could result in some hearing
loss. To ensure against potentially dangerous exposure
to high sound pressure levels, it is recommended that
all persons exposed to equipment capable of
producing high sound pressure levels use hearing
protectors while the equipment is in operation. Ear
plugs or protectors in the ear canals or over the ears
must be worn when operating the equipment in order
to prevent a permanent hearing loss if exposure is in
excess of the limits set forth here.
AC-Power Sources
This set should be operated only from the type of
power source indicated on the marking label. If you
are not sure of the type of electrical power supplied to
your home, consult your dealer or local power
company. For those sets designed to operate from
battery power, or other sources, refer to the operating
instructions.
Overloading
Do not overload wall outlets, extension cords or
convenience receptacles beyond their capacity, since
this can result in fire or electric shock.
An appliance and cart combination
should be move with care. Quick
stops, excessive force and uneven
surfaces may cause the appliance
and cart combination to overturn.
Accessories
Do not place the set on an unstable cart, stand, tripod,
bracket, or table. The set may fall, causing serious
injury to a child or an adult, and serious damage to
the set. Use only a cart stand tripod, bracket, or table
recommended by the manufacturer.
For the set with a three-wire grounding type ac plug:
This plug will only fit into a grounding-type power
outlet. This is a safety feature. If you are unable to
insert the plug into the outlet, contact your electrician to
have a suitable outlet installed. Do not defeat the
safety purpose of the grounding plug.
CONTENTS
Introduction.................................................4~6
Package accessories........................................ 7
Specifications................................................. 7
Speaker connection......................................... 7
Name and functions of remote controller.............. 8
Features and functions of the amplifier............9~11
Connector information.....................................12
Physical........................................................12
How to connect speaker..................................13
How to connect music A.V. source.................... 13
How to connect record................................... 13
How to connect home theater and karaoke.........14
How to connect microphone............................ 15
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK) NO USER-
SERVICEABLE PARTS INSIDE REFER SERVICING TO
QUALIFIED PERSONNEL
2 3
WARNING- To reduce the risk of fire or electric shock, do not expose
this appliance to rain or moisture.
Duration Per Day
In Hours
8
6
4
3
2
1.5
1
0.5
0.25 or less
Sound Level dBA,
Slow Response
90
92
95
97
100
102
105
110
115
Typical
Example
Duo in small club
Subway Train
Very loud classical music
Patrice screaming at Ron about deadlines
Loudest parts at a rock concert
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITALKEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LO MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LO MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LO MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO DPH LO RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL LAL MID HILO
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MICMASTER VOL MUSIC MASTER VOL
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITAL KEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LO MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LO MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LO MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO DPH LO RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL LAL MID HILO
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MIC MASTER VOL MUSICMASTER VOL
110V AC-POWER
110V AC-POWER
110V AC-POWER CORD INCLUDED

Echo Effect
You can increase the echo effect by adjusting the
volume with Low (Lo) and High (HI) and mixing with
the Time Delay (DLY) and Repeat (RPT).
GENERAL CONSIDERATIONS
AC Power Distribution
The majority of AC outlets encountered in homes
and clubs are served by a 240VAC center- tapped
service entrance transformer. This provides two phases
of AC power on either side of the center tap at 120V
each. In order to minimize ground loops, the safety
grounds for all the outlets should be connected to a
common ("star") grounding point, and the distance
between the outlets and the common grounding point
should be as short as possible.
If lighting is used in a show, it is preferable to
power the lights from one leg of the service, and
power the audio equipment from the other leg. This
will help minimize noise from the lights coupling into
the audio.
When setting up for a show, oftentimes you are
plugging into an AC power distribution system you
know nothing about. You may even be faced with
2-wire AC outlet tester in your toolbox so you can
check the outlets yourself to make sure they are wired
correctly. These testers will tell you if the polarity of the
hot and neutral wires is reversed and if the safety
ground is disconnected. Don't use an outlet if it is
wired improperly! This is to protect yourself as well as
your equipment.
If you find that you must plug into a two-wire outlet,
you will need to use a two-wire to three-wire adapter
(cheater plug). These come with a metal tab that you
put underneath the center screw that holds the AC
outlet faceplate in place. This center screw must be
grounded. You can check it by connecting the adapter
to the outlet and then plugging in your AC outlet tester.
Input Wiring
Use a high-quality 3-conductor shielded cable to
connect the signal between the signal source and the
balanced inputs to the amplifier. If you're using the
unbalanced inputs, use a high-quality 2-conductor
shielded cable.
Output Wiring
Use heavy gauge, stranded wire for connecting
speakers to the MA-930 terminals. As the distance
between the amplifier and the speakers increase, the
thickness of the wire should also increase. Speaker
wire has resistance, and when electricity passes
through a resistor, power is lost. The thicker the wire,
the less resistance it offers, and the more power
actually gets to the speakers.
The thickness of wire is rated in gauges. Use the
chart below to determine the correct gauge of wire to
use according to the distance between the speakers
and the amplifier, and the impedance of the load the
amplifier is driving. This ensures that the power lost
across the speaker wire is less than 0.5dB.
SAFETY PRECAUTIONS
Selecting fine audio equipment such as the unit
you've just purchased is only the first step to your
musical enjoyment. Now it's time to consider how you
can maximize the fun and the safety of your new
equipment. We want you to get the most out of your
equipment by playing it at a safe level without
affecting your hearing. Sound can be very harmful.
Over time your hearing "comfort level" adapts to higher
volumes of sound. What sounds "normal" can actually
be loud and harmful to your hearing. Therefore,
please guard against this by setting your equipment at
a safe level before your hearing adapts. To establish a
safe level, you can start your volume control at a low
setting, then slowly increase the sound until you can
hear it comfortably and clearly. If used wisely, your
new sound equipment will provide you more new
experience in music. Since hearing damage from loud
noise is often undetectable until it is too late, we
recommend you avoid prolonged exposure to
excessive noise. The following noises can be
dangerous under constant exposure. Therefore, please
be cautious with the dB level when playing your new
equipment.
Decible Level Example
120 dB Rock band concert in front of
speakers, thunderclap
140 dB Gunshot blast, jet plane
180 dB Rocket launching pad
SPECIFICATIONS
PACKAGE ACCESSORIES
SPEAKER CONNECTION
6 7
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITALKEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LOW MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LOW MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LOW MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO VOL LOW RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL BAL MID HILOW
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MICMASTER VOL MUSIC MASTER VOL
Extra Echo Effect
Extra Echo
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO VOL LOW RPT DLYHI
WIRE
LENGTH
Up to 25 ft
Up to 40 ft
Up to 60 ft
Up to 100 ft
Up to 150 ft
Up to 250 ft
LOAD
IMPEDANCE
2
4
8
2
4
8
2
4
8
2
4
8
2
4
8
2
4
8
GAUGE OF WIRE
14 gauge
16 gauge
18 gauge
12 gauge
14 gauge
18 gauge
10 gauge
12 gauge
16 gauge
8 gauge
10 gauge
14 gauge
6 gauge
8 gauge
12 gauge
4 gauge
6 gauge
10 gauge
Audio Output.................................
MIC Input Sensitivity........................
External Devices Sensitivity...............
Signal/Noise Ratio (with IHF A Filter)..
T.H.D (1kHz.AUX 150mV INPUT)......
Frequency Band.............................
MIC. Tone Adjustment.....................
ECHO Tone Adjustment...................
Power Source................................
Electricity Consumption....................
Weight.........................................
Dimension (inch).............................
300W+300W
0<15mV
250mV
80dB
2%
25Hz~20kHz
80Hz+15dB
3.5kHz+15dB
12kHz+15dB
80Hz+15dB
12kHz+15dB
AC110V/60Hz
550W
33LBs
15 (W)x7(H)x17(L)
1
4
TO STEREO SPEAKER
TWO PAIR SPEAKER SYSTEM
Banana Plug Type
Insert Type
Amplifier
Remote control one unit
AC power cable
United States (M) to IEC (F)
Battery size: AA (R6 1.5 V)
A Speaker
Left
B Speaker
Left
A Speaker
Right
B Speaker
Right
AA
AA
ALKALINE
BATTERY
ALKALINE
BATTERY
A
LOW
#b
B
HIGHNORMAL
MIC
MASTER
VOLUME
MUSIC VOLUME
remote controller
MA-930
INPUT

Echo Effect
You can increase the echo effect by adjusting the
volume with Low (Lo) and High (HI) and mixing with
the Time Delay (DLY) and Repeat (RPT).
GENERAL CONSIDERATIONS
AC Power Distribution
The majority of AC outlets encountered in homes
and clubs are served by a 240VAC center- tapped
service entrance transformer. This provides two phases
of AC power on either side of the center tap at 120V
each. In order to minimize ground loops, the safety
grounds for all the outlets should be connected to a
common ("star") grounding point, and the distance
between the outlets and the common grounding point
should be as short as possible.
If lighting is used in a show, it is preferable to
power the lights from one leg of the service, and
power the audio equipment from the other leg. This
will help minimize noise from the lights coupling into
the audio.
When setting up for a show, oftentimes you are
plugging into an AC power distribution system you
know nothing about. You may even be faced with
2-wire AC outlet tester in your toolbox so you can
check the outlets yourself to make sure they are wired
correctly. These testers will tell you if the polarity of the
hot and neutral wires is reversed and if the safety
ground is disconnected. Don't use an outlet if it is
wired improperly! This is to protect yourself as well as
your equipment.
If you find that you must plug into a two-wire outlet,
you will need to use a two-wire to three-wire adapter
(cheater plug). These come with a metal tab that you
put underneath the center screw that holds the AC
outlet faceplate in place. This center screw must be
grounded. You can check it by connecting the adapter
to the outlet and then plugging in your AC outlet tester.
Input Wiring
Use a high-quality 3-conductor shielded cable to
connect the signal between the signal source and the
balanced inputs to the amplifier. If you're using the
unbalanced inputs, use a high-quality 2-conductor
shielded cable.
Output Wiring
Use heavy gauge, stranded wire for connecting
speakers to the MA-930 terminals. As the distance
between the amplifier and the speakers increase, the
thickness of the wire should also increase. Speaker
wire has resistance, and when electricity passes
through a resistor, power is lost. The thicker the wire,
the less resistance it offers, and the more power
actually gets to the speakers.
The thickness of wire is rated in gauges. Use the
chart below to determine the correct gauge of wire to
use according to the distance between the speakers
and the amplifier, and the impedance of the load the
amplifier is driving. This ensures that the power lost
across the speaker wire is less than 0.5dB.
SAFETY PRECAUTIONS
Selecting fine audio equipment such as the unit
you've just purchased is only the first step to your
musical enjoyment. Now it's time to consider how you
can maximize the fun and the safety of your new
equipment. We want you to get the most out of your
equipment by playing it at a safe level without
affecting your hearing. Sound can be very harmful.
Over time your hearing "comfort level" adapts to higher
volumes of sound. What sounds "normal" can actually
be loud and harmful to your hearing. Therefore,
please guard against this by setting your equipment at
a safe level before your hearing adapts. To establish a
safe level, you can start your volume control at a low
setting, then slowly increase the sound until you can
hear it comfortably and clearly. If used wisely, your
new sound equipment will provide you more new
experience in music. Since hearing damage from loud
noise is often undetectable until it is too late, we
recommend you avoid prolonged exposure to
excessive noise. The following noises can be
dangerous under constant exposure. Therefore, please
be cautious with the dB level when playing your new
equipment.
Decible Level Example
120 dB Rock band concert in front of
speakers, thunderclap
140 dB Gunshot blast, jet plane
180 dB Rocket launching pad
SPECIFICATIONS
PACKAGE ACCESSORIES
SPEAKER CONNECTION
6 7
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
16 BIT DIGITALKEY CONTROLLER
B
B INPUT
B
POWER
ON
OFF
b4
A
A INPUTLOW HIGHNORMAL
A
b3 b2 b1 #1
#
#2 #3 #4
b
KEYCONTROL
MA-930
ExtraEchoEffect
ExtraEcho
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC1 VOL BAL LOW MID HIECHO
REMOTE
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC2 VOL BAL LOW MID HIECHO
INPUT
GAIN PEAK 0 10 0 10L5 R5 -15 +15 -12 +12 -15 +15
-20dB
MIC3 VOL BAL LOW MID HIECHO
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO VOL LOW RPT DLYHI
0 10 0 10L5 R5 -15 +15 -12 +12
MUSIC VOL BAL MID HILOW
0 20
1 19
2 18
3 17
4 16
5 15
6
789 11 12 13
10
14
MICMASTER VOL MUSIC MASTER VOL
Extra Echo Effect
Extra Echo
SELECTOR 0 10 0 10L5 R5 -15 +15 -12 +12
ST MO
ECHO VOL LOW RPT DLYHI
WIRE
LENGTH
Up to 25 ft
Up to 40 ft
Up to 60 ft
Up to 100 ft
Up to 150 ft
Up to 250 ft
LOAD
IMPEDANCE
2
4
8
2
4
8
2
4
8
2
4
8
2
4
8
2
4
8
GAUGE OF WIRE
14 gauge
16 gauge
18 gauge
12 gauge
14 gauge
18 gauge
10 gauge
12 gauge
16 gauge
8 gauge
10 gauge
14 gauge
6 gauge
8 gauge
12 gauge
4 gauge
6 gauge
10 gauge
Audio Output.................................
MIC Input Sensitivity........................
External Devices Sensitivity...............
Signal/Noise Ratio (with IHF A Filter)..
T.H.D (1kHz.AUX 150mV INPUT)......
Frequency Band.............................
MIC. Tone Adjustment.....................
ECHO Tone Adjustment...................
Power Source................................
Electricity Consumption....................
Weight.........................................
Dimension (inch).............................
300W+300W
0<15mV
250mV
80dB
2%
25Hz~20kHz
80Hz+15dB
3.5kHz+15dB
12kHz+15dB
80Hz+15dB
12kHz+15dB
AC110V/60Hz
550W
33LBs
15 (W)x7(H)x17(L)
1
4
TO STEREO SPEAKER
TWO PAIR SPEAKER SYSTEM
Banana Plug Type
Insert Type
Amplifier
Remote control one unit
AC power cable
United States (M) to IEC (F)
Battery size: AA (R6 1.5 V)
A Speaker
Left
B Speaker
Left
A Speaker
Right
B Speaker
Right
AA
AA
ALKALINE
BATTERY
ALKALINE
BATTERY
A
LOW
#b
B
HIGHNORMAL
MIC
MASTER
VOLUME
MUSIC VOLUME
remote controller
MA-930
INPUT

Printed on 100% Recycled Paper Nissindo Trademark All Rights Reserved Design and Engineered in U.S.A. Code No. D030918
Thank you for purchasing this unit. To
make full and effective use of this unit,
please read this Owner's Manual
carefully before operating it.
After reading, retain this booklet
together with the Warranty Card for
future use in case of defections or
other troubles.