Model MA-9S2 User Guide
Monaural Power Amplifier
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IMPORTANT SAFETY
INSTRUCTIONS
READ BEFORE OPERATING EQUIPMENT
This product was designed and manufactured to meet strict quality and safety standards. There are, however, some installation
and operation precautions which you should be particularly aware of.
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 manufacture'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.
Additional Safety Information!
•
This product should not be placed in a built-in installation such as a bookcase or rack unless proper
ventilation is provided or the manufacturer’s instructions have been adhered to.
•
Apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as
vases, shall be placed on the apparatus.
•
•
When the switch is in the OFF position, the apparatus isn’t completely switched-off from the MAINS.
The equipment shall be installed near the Socket-Outlet and shall be easily accessible.
Do Not Touch Hot Spots During and Immediately After Use
During and immediately after use, the MA-9S2 is hot in areas other than the controls and rear panel
connection jacks. Do not touch hot spots and especially the top panel. Contact with hot areas can cause
burns.
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ENGLISH
FRANÇAIS
WARRANTY
GARANTIE
For warranty information, contact your local Marantz distributor.
Pour des informations sur la garantie, contacter le distributeur local
Marantz.
RETAIN YOUR PURCHASE RECEIPT
Your purchase receipt is your permanent record of a valuable
purchase. It should be kept in a safe place to be referred to as
necessary for insurance purposes or when corresponding with
Marantz.
CONSERVER L'ATTESTATION D'ACHAT
L'attestation d'achat est la preuve permanente d'un achat de valeur.
La conserver en lieu sur pour s'y reporter aux fins d'obtention d'une
couverture d'assurance ou dans le cadre de correspondances avec
Marantz.
IMPORTANT
When seeking warranty service, it is the responsibility of the
consumer to establish proof and date of purchase. Your purchase
receipt or invoice is adequate for such proof.
IMPORTANT
Pour l'obtention d'un service couvert par la garantie, il incombe au
client d'établir la preuve de l'achat et d'en corroborer la date. Le reçu
ou la facture constituent des preuves suffisantes.
FOR U.K. ONLY
This undertaking is in addition to a consumer's statutory rights and
does not affect those rights in any way.
DEUTSCH
GARANTIE
Bei Garantiefragen wenden Sie sich bitte an Ihren Marantz-Händler.
HEBEN SIE IHRE QUITTING GUT AUF
Die Quittung dient Ihnen als bleibende Unterlage für Ihren wertvollen
Einkauf Das Aufbewahren der Quittung ist wichtig, da die darin
enthaltenen Angaben für Versicherungswecke oder bei
Korrespondenz mit Marantz angeführt werden müssen.
WICHTIG!
Bei Garantiefragen muß der Kunde eine Kaufunterlage mit
Kaufdatum vorlegen. Ihren Quittung oder Rechnung ist als
Unterlage ausreichend.
CE MARKING
English
The MA9S2/N1G is in conformity with the EMC directive and low-voltage directive.
Français
Le MA9S2/N1G est conforme à la directive EMC et à la directive sur les basses tensions.
Deutsch
Das Modell MA9S2/N1G entspricht den EMC-Richtlinien und den Richtlinien für Niederspannungsgeräte.
–
–
Veiller à ce qu’aucun objet ne soit à moins de 0,2 mètre des côtés de l'appareil.
English
Aucun objet rempli de liquide, un vase par exemple, ne doit être placé sur
WARNINGS
l'appareil.
–
–
–
–
–
Do not expose the equipment to rain or moisture.
Do not remove the cover from the equipment.
Do not insert anything into the equipment through the ventilation holes.
Do not handle the mains cord with wet hands.
Do not cover the ventilation with any items such as tablecloths, newspapers,
curtains, etc.
–
–
Lorsque l'interrupteur est sur la position OFF, l'appareil n'est pas complètement
déconnecté du SECTEUR (MAINS).
L'appareil sera installé près de la source d'alimentation, de sorte que cette
dernière soit facilement accessible.
Deutsch
–
–
No naked flame sources, such as lighted candles, should be placed on the
equipment.
WARNHINWEISE
Das Gerät nicht Regen oder Feuchtigkeit aussetzen.
Die Abdeckung nicht vom Gerät abnehmen.
Keine Gegenstände durch die Belüftungsschlitze stecken.
Das Netzkabel nicht mit feuchten oder nassen Händen anfassen.
When disposing of used batteries, please comply with governmental regulations
–
–
–
–
–
or environmental public instruction’s rules that apply in your country or area.
–
–
–
Make a space of about 0.2 meter around the unit.
No objects filled with liquids, such as vases, shall be placed on the equipment.
When the switch is in the OFF position, the equipment is not completely
switched off from MAINS.
Decken Sie die Lüftungsöffnungen nicht mit einem Tischtuch, einer Zeitung,
einem Vorhang usw. ab.
–
The equipment shall be installed near the power supply so that the power supply
is easily accessible.
–
–
–
–
–
–
Es dürfen keine Gegenstände mit offener Flamme, wie etwa brennende Kerzen,
auf dem Gerät aufgestellt werden.
Beachten Sie bei der Entsorgung der verbrauchten Batterien alle geltenden
lokalen und überregionalen Regelungen.
Français
Auf allen Geräteseiten muß ein Zwischenraum von ungefähr 0,2 meter
AVERTISSEMENTS
vorhanden sein.
–
–
–
–
–
Ne pas exposer l’appareil à la pluie ni à l’humidité.
Ne pas essayer de retirer le boîtier de l’appareil.
Ne rien insérer dans l’appareil par les orifices de ventilation.
Ne pas manipuler le cordon d’alimentation avec les mains mouillées.
Auf das Gerät dürfen keine mit Flüssigkeiten gefüllte Behälter, wie etwa eine
Vase, gestellt werden.
Wenn der Schalter ausgeschaltet ist (OFF-Position), ist das Gerät nicht
vollständig vom Stromnetz (MAINS) abgetrennt.
Das Gerät sollte in der Nähe einer Netzsteckdose aufgestellt werden, damit es
Ne pas recouvrir les ouïes de ventilation avec un objet quelconque comme une
leicht an das Stromnetz angeschlossen werden kann.
nappe, un journal, un rideau, etc.
–
–
Ne placer aucune source de flamme nue, comme une bougie allumée, sur
l'appareil.
Pour mettre au rebut les piles usées, respecter les lois gouvernementales ou les
règlements officiels concernant l’environnement qui s'appliquent à votre pays ou
région.
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TABLE OF CONTENTS
INSTRUCTION FOR USE...................................................................................................................... 2
FOREWORD .......................................................................................................................................................2
EQUIPMENT MAINS WORKING SETTING .......................................................................................................2
COPYRIGHT .......................................................................................................................................................2
PRECAUTIONS ..................................................................................................................................................2
ACCESSARIES ..................................................................................................................................... 2
MAIN FEATURE OF PRODUCT ............................................................................................................ 3
CONNECTIONS .................................................................................................................................... 4
BI-WIRING ..........................................................................................................................................................5
WIRING THE SPEAKER SYSTEM .....................................................................................................................5
WIRING SPEAKER CABLE ................................................................................................................................5
BI-AMP (CONNECTION) ....................................................................................................................................7
WIRING THE SPEAKER SYSTEM .....................................................................................................................7
COMPLETE BI-AMP CONNECTION ..................................................................................................................9
BALANCED TERMINAL......................................................................................................................................9
INSTALLING THE SUPER AUDIO CD MULTI-CHANNEL AUDIO SPEAKERS ...............................................10
ITU (INTERNATIONAL TELECOMMUNICATION UNION) ..............................................................................10
WIRING SPEAKER SYSTEM ...........................................................................................................................11
NAME AND FUNCTION ...................................................................................................................... 12
FRONT PANEL .................................................................................................................................................12
REAR PANEL ....................................................................................................................................................12
SPECIFICATION .................................................................................................................................. 13
SPECIFICATION ...............................................................................................................................................13
DIMENSIONS ...................................................................................................................................................13
BLOCK DIAGRAM ............................................................................................................................... 13
TROUBLE SHOOTING ........................................................................................................................ 14
ABOUT THE PROTECTIVE CIRCUIT ..............................................................................................................14
MAINTENANCE ................................................................................................................................... 14
A NOTE ABOUT RECYCLING
This product’s packaging materials are recyclable and can be reused. This product
and the accessories packed together are the applicable product to the WEEE directive
except batteries.
Please dispose of any materials in accordance with your local recycling regulations.
When discarding the unit, comply with your local rules or regulations.
Batteries should never be thrown away or incinerated but disposed of in accordance
with your local regulations concerning chemical wastes.
1
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INSTRUCTION FOR USE
ACCESSARIES
After opening the cover of the packing box, check that the
following accessories are included.
FOREWORD
This section must be read before any connection is made to
the mains supply.
• AC Power Cable
EQUIPMENT MAINS WORKING
SETTING
(MA-9S2/N1G)
(MA-9S2/U1G)
Your Marantz product has been prepared to comply with the
household power and safety requirements that exist in your
area.
• Instruction Manual (this Copy)
MA-9S2/N1G can be powered by 230 V AC only.
MA-9S2/U1G can be powered by 120 V AC only.
COPYRIGHT
Recording and playback of any material may require consent.
For further information refer to the following:
— Copyright Act 1956
— Dramatic and Musical Performers Act 1958
— Performers Protection Acts 1963 and 1972
— any subsequent statutory enactments and orders
PRECAUTIONS
The following precautions should be taken when operating the
equipment.
7 General Precautions
When siting the equipment ensure that:
— the ventilation holes are not covered;
— air is allowed to circulate freely around the equipment
— it is on a vibration free-surface;
— it will not be exposed to interference from an external
source;
— it will not be exposed to excessive heat, cold, mois
ture or dust;
— it will not be exposed to direct sunlight;
— it will not be exposed to electrostatic discharges
Never place heavy objects on the equipment.
If a foreign body or water does enter the equipment, contact
your nearest dealer or service centre.
Do not pull out the plug by pulling on the mains lead, hold the
plug.
It is advisable when leaving the house, or during a
thunderstorm, to disconnect the equipment from the mains
supply.
2
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MAIN FEATURE OF PRODUCT
7 The concept : Instantaneous
7 Fully balanced monaural power
current delivery capability
amp
Even if amplifier have the same power specifications, their
performance may not be the same due to a difference in current
delivery capability.
To minimize the influence of strong “kick back current”occurring
from the loudspeaker system, the circuit for the power amp
consists of two amplifiers giving a voltage gain amp of 23dB,
in a push-pull balanced construction, for the final buffer amp
of 6dB.
The delivery capability of power amplifier depends on how
instantaneous the current supply is.
That’s why the power supply for the MA-9S2 was completely
revamped to give it a truly instantaneous current supply
capability that has been increased three times as much
compared to any Marantz product designed before.
7 HDAM SA
The feedback impedance of the Current Feedback circuit was
reduced to its minimum to make it faster.
We developed a new Hyper Dynamic Amplifier Modules
(HDAM), a separated module operating as a buffer for the
amplifier.
7 Choke input system
The power supply of the voltage gain amplifier’s adopted choke
input system has few ripples and is durable with load changes.
This can prevent noise from the amplifier as well as reduce
noise from the primary winding, resulting in a clean power
supply.
7 Ultra low impedance amplifier
The buffer amplifier’s power supply block, which supports the
high current delivery capability, uses a capacitance input
system to realize very low impedance.
The new developed toroidal power transformer, the low
impedance electrolytic capacitors, the very large gauge internal
wiring, and the thick pattern PWB all contribute in supplying
the required power.
3
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CONNECTIONS
Connection 1
Stereo Bi-wiring Connection
：Audio signal
ID NO.
1
2
Set to "1".
3
4
PUSH
5
6
PUSH
SC-7S2
MODE
or
STEREO
BI-AMP
Set to "STEREO".
or
(
)
(
)
-
-
ATTENUATOR dB
ATTENUATOR dB
-3
0
0
-
3
-6
-
6
Set to "0".
Set to "0".
-
9
-
9
-
12
-
12
-
-
∞�
MA-9S2
for Lch
MA-9S2
for Rch
∞�
PUSH
PUSH
�
�
MF/HF
MF/HF
LF
LF
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Speaker
L ch
Speaker
R ch
This connection can have options i.e.You may connect the units using either balanced or unbalanced
cables.
4
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CONNECTIONS
Connection 1 - 4 are recommended by Marantz for the SC-7S2 with Marantz MA-9S2s.
All Connections are based on speaker systems that are capable of Bi-Wiring.
Please read the instruction manual for the SC-7S2 for use. Name and Function ➔ P12
BI-WIRING
WIRING SPEAKER CABLE
The method is to improve sound quality, by connecting speaker
cable respectively to each terminal for Bass and Mid/High
speakers. This method will reduce interference caused by the
bass speaker and the Mid/High speaker unit being powered
by the same amplifier.
• Be careful not to short circuit in wiring speaker cables.
• Peel off the corting of speaker cable as shown below.
Approx. 1 cm
Speaker system
Bi-Wiring
Mid/High
speaker unit
Peel off the edge
of cable.
Twist conductors.
Cut the corting
of cable.
CD Player
Pre-Amp
Power-Amp
Low speaker
unit
• Wiring with speaker cable.
WIRING THE SPEAKER SYSTEM
7 Speaker system doesn’t comply
with the Bi-Wiring
Please connect either of the speaker terminals 1 or 2. And
please use a speaker system whose impedance is for 4 - 16Ω.
If impedance is lower than 4Ω, the protection circuit will be
engaged during play.This will result in no output of the Amplifier.
Turn clockwise to
tighten.
Turn counter-clock-
wise to loosen.
Insert conductor
of cable.
• Wiring with “Y” style terminal
7 Speaker system comply with the
Bi-Wiring
Please connect both of the speaker terminals 1 and 2. And
please use a speaker system whose impedance is for 4 - 16Ω.
If impedance is lower than 4Ω, protection circuit will be engaged
during play. This will result in no output of the Amplifier.
Turn clockwise to
tighten.
Turn counter-clock-
wise to loosen.
Insert
conductor.
7 Polarity of Speaker output
terminal
Speaker terminals have positive (+ : Red) and negative (– :
White) polarity and speaker wires also have (+ & –) polarity. In
wiring, be sure to connect the terminals with the same polarity
(+ and +, – and –).
CAUTION:
When connecting two pairs of speaker systems simulta-
neously, the impedance of each speaker system should be
no less than 8 ohm .
Connecting a speaker system with a lower impedance than
8 ohm may activate the protection circuitry and make nor-
mal stereo reproduction impossible.
5
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CONNECTIONS
Connection 2
Stereo Bi-Amp connection.
(Make sure your speakers are designed for Bi Amp capabilities)
：Audio signal
ID NO.
1
2
Set to "1".
3
4
PUSH
5
6
PUSH
SC-7S2
MODE
STEREO
BI-AMP
Set to "STEREO".
(
)
(
)
-
-
ATTENUATOR dB
ATTENUATOR dB
-3
0
0
-
3
-
6
-
6
Set to "0".
Set to "0".
-9
-
9
-
12
-
12
MA-9S2
for Lch MF/HF
MA-9S2
for Rch MF/HF
-
-
∞�
∞�
PUSH
PUSH
�
�
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
MF/HF
LF
MF/HF
LF
(
)
(
)
-
-
ATTENUATOR dB
ATTENUATOR dB
-3
0
0
-
3
-6
-
6
-9
-
9
-
12
Speaker
L ch
-
12
Speaker
R ch
-
-
∞�
∞�
Set to "0".
Set to "0".
MA-9S2
for Lch LF
MA-9S2
for Rch LF
PUSH
PUSH
�
�
6
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CONNECTIONS
Enhance connection 1 to Bi-Amp connection, and drive the
bass speaker and Mid / High Frequency speakers with separate
power Amplifiers.
BI-AMP (CONNECTION)
The benefits of Bi-Wiring; drive the bass speaker and Mid /
High speakers with separate power Amplifiers. Bi-Amping will
lessen the burden of Power Amp impedance, so that back
electromotive force between the Low and Mid/High signal can
be lessened. We can expect drastic improvement of sound
quality.
Bi-Amp Connection
Speaker system
Mid / High
Power-Amp
speaker unit
CD Player
Pre-Amp
Low speaker
unit
Power-Amp
Caution:
In the event of this connection (Control Amp SC-7S2 is
<Stereo>mode), SC-7S2 and MA-9S2 can be wired by
Unbalanced only.
WIRING THE SPEAKER SYSTEM
• Please remove short bar of speaker terminal.
If short bar has not been remove, it will damage the power
amplifier.
• Please use speaker systems whose impedance are for 4 -
16Ω.
If impedance is lower than 4Ω, the protection circuit will be
engaged during play.
• Make sure your speakers are designed for Bi Amp
capabilities. If they don’t the protection circuit will be
engaged and there will be no output. Or it will damage the
power amplifier.
7
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CONNECTIONS
Connection 3
Stereo complete Bi-Amp connection.
(Make sure your speakers are designed for Bi Amp capabilities)
ID NO.
ID NO.
As shown by connection 3 or 4, the
control Amp SC-7S2 can be controlled
through sets by wiring with the equipped
remote control.
1
2
1
2
3
Set to "1".
3
4
4
: Audio signal
5
5
6
6
or
or
Set to "2".
PUSH
PUSH
PUSH
PUSH
SC-7S2
for Lch
SC-7S2
for Rch
MODE
MODE
Bch can’t be used.
STEREO
BI-AMP
STEREO
BI-AMP
Bch can’t be used.
or
or
Set to "BI-AMP".
Set to "BI-AMP".
(
)
(
)
-
-
ATTENUATOR dB
ATTENUATOR dB
0
0
-3
-
-
3
-6
-
6
Set to "0".
Set to "0".
-9
-
9
-12
-
12
MA-9S2
for Lch MF/HF
MA-9S2
for Rch MF/HF
-
PUSH
PUSH
�
�
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
MF/HF
LF
MF/HF
(
)
(
)
-
-
ATTENUATOR dB
ATTENUATOR dB
0
0
-3
-
-
3
-
6
-
6
LF
-
9
-
9
-
12
-
12
Speaker
L ch
Speaker
R ch
-
Set to "0".
Set to "0".
MA-9S2
for Lch LF
MA-9S2
for Rch LF
PUSH
PUSH
�
�
8
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CONNECTIONS
This connection can have options i.e.You may connect the units using either balanced or unbalanced
cables. But, you have to use the same cables per SC-7S2.
COMPLETE BI-AMP CONNECTION
BALANCED TERMINAL
Enhance connection 2, by having one more control Amp. SC-
7S2, this is a Complete Bi-Amp connection which separates
Mid / High (MF/HF) signal and Low (LF) signal from Pre-Amp
section.
q The balanced output connector uses a XLR connector.
w The XLR connector is internally wired in either of the
following two systems.
Complete Bi-Amp connection
Speaker system
1. USA system (Pin 2 = COLD, Pin 3 = HOT)
Mid / High
speaker unit
GND
COLD
Pre-Amp
Pre-Amp
Power-Amp
Power-Amp
2
1
3
CD Player
HOT
Low speaker
unit
In this event, SC-7S2 is using as Monaural Amps. And separate
Left/Right channels from the output terminal of CD players.
As a result, influences between L channel and R channel Mid
/ High signal and Low signal will be eliminated.
A maximum of 6 SC-7S2s, can be connected to each other,
via remote cables.
2. European system (Pin 2 = HOT, Pin 3 = COLD)
GND
2
1
HOT
3
COLD
Caution:
In the event of setting mode switch as <Bi-Amp>, B channel
e The MA-9S2 uses the USA system of 1.
input terminals can’t be used.
When a preamp or main amplifier adopting the European
system is connected using a cable with XLR balanced
connectors, the reproduced signal may be inverted of
phase.
In this case, correct the wiring of the one of the XLR
connectors on the extremities of the cable to the USA
system by exchanging the connections of pins 2 and 3.
This will make it possible to play the signal with the correct
phase.
9
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CONNECTIONS
INSTALLING THE SUPER AUDIO
CD MULTI-CHANNEL AUDIO
SPEAKERS
ITU (INTERNATIONAL
TELECOMMUNICATION UNION)
The ITU is a special organization of the United Nations. It
consists of a number of organs, one of which is the Radio
Broadcasting Section.
ITU-R BS in the recommendation which consists of standards
relating to broadcasting (audio) operations, one of which is
the ITU-R BS.775-1 which governs “multi-channel stereo sound
systems.”
In order to enjoy Super Audio CD multi-channel sound with
the best possible acoustics, it is recommended that the speaker
systems be laid out in compliance with the ITU-R BS.775-1
recommendation which is a standard formulated by the
International Telecommunication Union (ITU).
Super Audio CD multi-channel discs are recorded and mixed
in such a way that they will achieve the optimum effects when
the speaker systems are laid out as per the ITU-R BS.775-1
recommendation.
• On Super Audio CD multi-channel discs, the music signals
are basically recorded using 5 channels (or 3, 4 or 6
channels in some cases). In some instances, however,
LFE (for the sub woofer) is recorded as a sixth channel.
Each disc indicates how many channels have been
recorded on it.
• The basic settings are 3 speakers for front and 2 for back
since multi-channel discs have basically 5 channels
The 2-front, 1-center, and 2-surround speakers should be
set on the circle from the listening point as shown below.
When you use different sizes of speakers, please adjust
the volume balances.
• The location of the sub-woofer in the picture is just to you
a patter of settings. Sub-woofer can be located any place
in your room. (See the users manual of your sub-woofer.)
Sub-woofer
Center
speaker
Front speaker
(Left)
Front speaker
(Right)
60°
approx. 110°
approx. 110°
Reference listening
position
Rear speaker
Rear speaker
(Left Surround)
(Right Surround)
10
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CONNECTIONS
Connection 4
5.1ch multi-channel connection
This connection can have options i.e. You may connect the units using either balanced or unbal-
anced cables. But, you have to use the same cables per SC-7S2.
Below is the standard connection for a Multi-channel sound source. This will enable you to experience the high quality sound
acoustic for the professional Home theatre and pure multi channel audio. The complete 5.1 system is controlled using 3 SC-7S2
Stereo Control Amplifiers.
WIRING SPEAKER SYSTEM
• <3 unit of SC-7S2 + 10 unit of MA-9S2 + Active sub-woofer>
• <6 unit of SC-7S2 + 10 unit of MA-9S2 + Active sub-woofer>
Please refer to <Wiring speaker system> p.5 of connection 1.
Caution
• If you use an Active (powered) sub-woofer for LFE, please refer to the Users manual of the Active sub-woofer for set up
instructions. LFE (Low Frequency Effect) is the channel for Low Frequency only.
• If you use a Passive sub-woofer for LFE, a Monaural power Amp such as the MA-9S2 can be used to drive it.
ID NO.
ID NO.
ID NO.
1
1
2
1
2
2
Set to "1".
3
3
3
：Audio signal
4
4
4
5
5
6
5
6
6
Set to "2".
Set to "3".
PUSH
PUSH
PUSH
SC-7S2
SC-7S2
SC-7S2
PUSH
PUSH
PUSH
Front center/
Subwoofer
Front L/Rch
Surround L/Rch
MODE
MODE
MODE
or
or
STEREO
BI-AMP
STEREO
BI-AMP
STEREO
BI-AMP
or
or
Set to "STEREO".
Set to "STEREO".
Set to "STEREO".
or
(
)
-
(
)
(
)
ATTENUATOR dB
(
)
(
-
)
-
-
-
ATTENUATOR dB
ATTENUATOR dB
ATTENUATOR dB
ATTENUATOR dB
0
0
0
0
0
-
3
-3
-3
-
3
-3
-
6
-
6
-6
-
6
-
6
Set to "0".
Set to "0".
Set to "0".
Set to "0".
Usually
set to "0".
-9
-
9
-
9
-
9
-9
-
12
-12
-12
-
12
-
12
MA-9S2
for Front Lch
MA-9S2
for Front Rch
MA-9S2
for Front center
MA-9S2
for Surround Lch
MA-9S2
for Surround Lch
-
-
-
-
-
∞�
∞�
∞�
∞�
∞�
PUSH
PUSH
PUSH
PUSH
PUSH
�
�
�
�
�
MF/HF
MF/HF
MF/HF
MF/HF
MF/HF
LF
LF
LF
LF
LF
Speaker
Front Lch
Speaker
Front Rch
Active (Powered)
Subwoofer
Speaker
Front center
Speaker
Surround L ch
Speaker
Surround R ch
Remove
the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
Remove the short bar.
11
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NAME AND FUNCTION
FRONT PANEL
REAR PANEL
e
r
y
-
monaural power amplifier ma 9s2
PUSH
�
METER OFF
ON
INPUT SELECTOR
1
power on/off
UNBALANCED-2
BALANCED
OFF
w
q
t
u
i
o
!
q Power switch
r Level meter
y ATT (Attenuator)
o Speaker output terminal
Press the power switch to turn the power on/off. When the
power is on, the power indicator e will illuminated.
The meter is used to check output power.
The knob is to attenuate input level.
Initial set up is 0 dB.
Connect your speaker system to these terminals.
Speaker cable wiring ¡ p.5
Meter indication vs Output power
Indicated level (dB) 8ΩLoad(W) 4ΩLoad(W)
w Input selector
u Balanced input terminal
! AC IN socket
0
300
600
This knob to select input source from Pre-Amp.
Connect to the Balanced output terminal of the Pre-Amp.
Connect to a household power outlet.
–10
–20
–30
–40
30
3
0.3
0.03
60
6
0.6
0.06
e Power indicator
i Unbalanced input terminal 1, 2
The power indicator is illuminated while the power switch
is on.
Connect to the Unbalanced output terminal of the Pre-
Amp.
t Meter off switch
This switch is used to turn on/off the level meter and inter-
nal light of level meter.
12
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SPECIFICATION
DIMENSIONS
SPECIFICATION
Power Output (20Hz - 20kHz)
............................................................ 300W (8Ω Load)
............................................................ 600W (4Ω Load)
T.H.D. (20Hz - 20kHz, 8Ω Load)..............................................0.01%
Frequency response (1W, 8Ω Load) ....... 3 Hz - 150 kHz (+0, –3dB)
Dumping factor ................................... 200 (20Hz - 20kHz, 8Ω Load)
Input sensitibity/ Input impedance
................................................. 1.7V / 20kΩ (Balanced)
............................................. 1.7V / 20kΩ (Unbalanced)
S/N (IHF-A)
......................................................... 123 dB (Balanced)
..................................................... 123 dB (Unbalanced)
Attenuation .............................................. 0, –3, –6, –9, –12, – ∞ dB
Power requirement (MA-9 S2/N1G) ........................ AC 230V 50Hz
(MA-9S2/U1G) ......................... AC 120V 60Hz
Power Consumption (MA-9S2/N1G) .......................................500 W
(MA-9S2/U1G) .......................................500 W
459
1200 W (Output: 4Ω, 600W)
Dimensions
................................................................Width 459 mm
.............................................................. Height 198 mm
............................................................... Depth 451 mm
Weight
........................................................................... 37.4 kg
Unit : mm
BLOCK DIAGRAM
1
UNBALANCED
2
ATT
+
-
I/V
+
-
I/V
+A
+B
SPEAKER
OUT
2
1
-
BALANCED
I/V
+
-
+
3
I/V
-A
-B
ATT
INPUT
SELECTOR
PROTECT
LOGAMP
±45V
±24V
OUTPUT STAGE
±50V
DRIVE STAGE
PROTECT
SOFT
START
13
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7 If the amplifier overheats
In the following cases, the amplifier will overheat and the
protective circuit will work .
TROUBLE SHOOTING
Should faults occur, in many cases it is not necessary to consult
your dealer or a Marantz technical service department.
On the basis of the following checks you will be able to rectify
a number of faults yourself without difficulty.
If the fault cannot be remedied after the following checks,
please consult your dealer or nearest Marantz service agent.
• If the unit is used with the ventilation blocked or obstructed
• If speakers of less than 4 Ω impedance are used
• If the unit is used for an extended period of time under
excessive signal input.
7 The unit does not turn ON
1.Is the power cable securely plugged into an AC outlet?
MAINTENANCE
The section describes the care and maintenance tasks that
must be performed to optimize the operation of your Marantz
equipment.
7 Sound is not coming from the
speakers
1.Has the wrong input source been selected with the INPUT
SELECTOR on the front panel?
7 Cleaning of equipment external
2.Is the ATTENUATOR switch set to -∞ on the rear panel?
3.Are speaker cables properly connected to the speaker
system?
surfaces
The exterior finish of your unit will last indefinitely with proper
care and cleaning, Never use scouring pads, steel wool,
scouring powders or harsh chemical agents (e.g., lye solution),
alcohol, thinner, benzine, insecticide or other volatile
substances as these will mar the finish of the equipment.
Likewise, never use cloths containing chemical substances. If
the equipment get dirty, wipe the external surfaces with a soft,
lint-free cloth.
4.Is the connection cable properly connected to the control
(pre) amplifier?
5.Is the control (pre) amplifier or input source wrongly set?
6.Are you using the player in the wrong way?
7.The protective circuit of this unit may have worked. Shut
power OFF, wait 1 minute or more, then reactivate the
power.
If the equipment becomes heavily soiled:
• dilute some washing up liquid in water, in a ratio of one
part detergent to six parts water.
ABOUT THE PROTECTIVE CIRCUIT
• dip a soft, lint free in the solution and wring the it is damp.
This unit incorporates a protective circuit that protects the
amplifier circuit and speaker system against damage. If the
protective circuit works, the power indicator in the meter flashes,
and sound is muted (no sound). This protective circuit works
in the following cases.
• wipe the equipment with the damp cloth.
7 At power ON
It takes approximately 8 seconds for the amplifier circuit to
stabilize after the power is turned on, during which time the
protective circuit works and sound is muted (no sound). Also
during this time, the power indicator in the meter flashes.
Once the amplifier circuit has stabilized, the protective circuit
is released, and sound can be heard.
• dry the equipment by wiping it with a dry cloth.
7 Repairs
7
If overcurrent flows to the amplifier
circuit (Overcurrent protection)
Only the most competent and qualified service technicians
should be allowed to service the factory-trained warranty station
personnel have the knowledge and special facilities needed
for repair and calibration of this precision equipment. After the
warranty period has expired, repairs will be performed for a
charge if the equipment can be returned to normal operation.
In the event of difficulty, refer to your dealer or write directly to
the nearest location to you that is listed on the Marantz
Authorized Service Station list. If writing, please include the
model and serial number of the equipment together with a full
description of what you think is abnormal about the equipment's
behaviour.
If overcurrent flows to the amplifier circuit because of excessive
signal input or if the unit is used with speakers of less than 4 Ω
impedance connected to it, overcurrent is detected and the
protective circuit engage. The protective circuit also works if
the speaker cables are accidentally shorted.
The power indicator in the meter flashes when the protective
circuit works, so check the power indicator.
If it has worked, shut power OFF, wait 1 minute or more, then
reactivate the power.
14
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You can find your nearest authorized distributor or dealer on our website.
is a registered trademark.
Printed in Japan
08/2006 00M339J851320 mzh-g
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