ESPAÑOL
FRANÇAIS
ENGLISH
5 Channel Power Amplifier
MM7055
2 Channel Power Amplifier
MM7025
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ESPAÑOL
FRANÇAIS
ENGLISH
SAFETY PRECAUTIONS
n
FCC INFORMATION (For US customers)
IMPOTANT SAFETY
INSTRUCTIONS
1. PRODUCT
This product complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) this product may not cause harmful
interference, and (2) this product must accept any interference received,
including interference that may cause undesired operation.
CAUTION
1. Read these instructions.
2. Keep these instructions.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
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.
CAUTION:
2. IMPORTANT NOTICE: DO NOT MODIFY THIS PRODUCT
This product, when installed as indicated in the instructions contained
in this manual, meets FCC requirements. Modification not expressly
approved by Marantz may void your authority, granted by the FCC, to use
the product.
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
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.
The lightning flash with arrowhead symbol, within an equilateral
triangle, 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.
3. NOTE
This product has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This product generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
product does cause harmful interference to radio or television reception,
which can be determined by turning the product OFF and ON, the user
is encouraged to try to correct the interference by one or more of the
following measures:
The exclamation point within an equilateral triangle is intended
to alert the user to the presence of important operating
and maintenance (servicing) instructions in the literature
accompanying the appliance.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
• Reorient or relocate the receiving antenna.
CAUTION:
• Increase the separation between the equipment and receiver.
• Connect the product into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the local retailer authorized to distribute this type of product or
an experienced radio/TV technician for help.
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.
15. Batteries shall not be exposed to excessive heat such as sunshine, fire or
the like.
HOT SURFACE. DO NOT TOUCH.
The top surface over the internal heat sink may become hot
when operating this product continuously.
Do not touch hot areas, especially around the “Hot surface
mark” and the top panel.
surface
Hot
For Canadian customers:
mark
PRECAUTION:
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.
SURFACE CHAUDE. NE PASTOUCHER.
La surface supérieure du dissipateur de chaleur peut devenir
chaude si vous utilisez ce produit en continu.
Ne touchez pas les zones chaudes, tout particulièrement vers
l’inscription “Hot surface mark” et le panneau supérieur.
CAUTION:
To completely disconnect this product from the mains, disconnect the plug
from the wall socket outlet.
The mains plug is used to completely interrupt the power supply to the unit
and must be within easy access by the user.
PRECAUCIÓN:
SUPERFICIE CALIENTE. NO TOCAR.
La superficie superior sobre el disipador de calor interno
podría llegar a calentarse al operar este producto de forma
continua.
PRECAUTION:
Pour déconnecter complètement ce produit du courant secteur, débranchez
la prise de la prise murale.
No toque las áreas calientes, especialmente las situadas
alrededor de la “Hot surface mark” y del panel superior.
La prise secteur est utilisée pour couper complètement l’alimentation de
l’appareil et l’utilisateur doit pouvoir y accéder facilement.
PRECAUCIÓN:
Para desconectar completamente este producto de la alimentación eléctrica,
desconecte el enchufe del enchufe de la pared.
El enchufe de la alimentación eléctrica se utiliza para interrumpir por completo
el suministro de alimentación eléctrica a la unidad y debe de encontrarse en
un lugar al que el usuario tenga fácil acceso.
I
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FRANÇAIS
ESPAÑOL
n CAUTIONS ON INSTALLATION
PRÉCAUTIONS D’INSTALLATION
EMPLAZAMIENTO DE LA INSTALACIÓN
NOTES ON USE / OBSERVATIONS RELATIVES A L’UTILISATION / NOTAS SOBRE EL USO
n
WARNINGS
AVERTISSEMENTS
ADVERTENCIAS
• Avoid high temperatures.
• Eviter des températures élevées.
• Evite altas temperaturas.
Allow for sufficient heat dispersion when
installed in a rack.
• Handle the power cord carefully.
Hold the plug when unplugging the cord.
• Keep the unit free from moisture, water, and
dust.
• Unplug the power cord when not using the unit
for long periods of time.
• Do not obstruct the ventilation holes.
• Do not let foreign objects into the unit.
• Do not let insecticides, benzene, and thinner
come in contact with the unit.
• Never disassemble or modify the unit in any way.
• Ventilation should not be impeded by covering
the ventilation openings with items, such as
newspapers, tablecloths or curtains.
• Naked flame sources such as lighted candles
should not be placed on the unit.
• Observe and follow local regulations regarding
battery disposal.
• Do not expose the unit to dripping or splashing
fluids.
• Do not place objects filled with liquids, such as
vases, on the unit.
• Do not handle the mains cord with wet hands.
• When the switch is in the OFF position, the
equipment is not completely switched off from
MAINS.
• The equipment shall be installed near the
power supply so that the power supply is easily
accessible.
Tenir compte d’une dispersion de chaleur
suffisante lors de l’installation sur une étagère.
• Manipuler le cordon d’alimentation avec
précaution.
Tenir la prise lors du débranchement du cordon.
• Protéger l’appareil contre l’humidité, l’eau et la
poussière.
• Débrancher le cordon d’alimentation lorsque
l’appareil n’est pas utilisé pendant de longues
périodes.
• Ne pas obstruer les trous d’aération.
• Ne pas laisser des objets étrangers dans
l’appareil.
• Ne pas mettre en contact des insecticides, du
benzène et un diluant avec l’appareil.
• Ne jamais démonter ou modifier l’appareil d’une
manière ou d’une autre.
• Ne pas recouvrir les orifices de ventilation avec
des objets tels que des journaux, nappes ou
rideaux. Cela entraverait la ventilation.
• Ne jamais placer de flamme nue sur l’appareil,
notamment des bougies allumées.
• Veillez à respecter les lois en vigueur lorsque
vous jetez les piles usagées.
• L’appareil ne doit pas être exposé à l’eau ou à
l’humidité.
Permite la suficiente dispersión del calor cuando
está instalado en la consola.
• Maneje el cordón de energía con cuidado.
Sostenga el enchufe cuando desconecte el
cordón de energía.
z
z
z
z
• Mantenga el equipo libre de humedad, agua y
polvo.
• Desconecte el cordón de energía cuando no
utilice el equipo por mucho tiempo.
• No obstruya los orificios de ventilación.
• No deje objetos extraños dentro del equipo.
• No permita el contacto de insecticidas, gasolina
y diluyentes con el equipo.
Wall
Paroi
Pared
• Nunca desarme
ninguna manera.
o
modifique el equipo de
zFor proper heat dispersal, do not install this unit in a confined
space, such as a bookcase or similar enclosure.
• More than 0.3 m (12 in.) is recommended.
• La ventilación no debe quedar obstruida por
haberse cubierto las aperturas con objetos como
periódicos, manteles o cortinas.
• No deberán colocarse sobre el aparato fuentes
inflamables sin protección, como velas
encendidas.
• A la hora de deshacerse de las pilas, respete la
normativa para el cuidado del medio ambiente.
• No exponer el aparato al goteo o salpicaduras
cuando se utilice.
• No colocar sobre el aparato objetos llenos de
líquido, como jarros.
• No maneje el cable de alimentación con las
manos mojadas.
• Cuando el interruptor está en la posición OFF, el
equipo no está completamente desconectado de
la alimentación MAINS.
• El equipo se instalará cerca de la fuente de
alimentación de manera que resulte fácil acceder
a ella.
• Do not place any other equipment on this unit.
zPour permettre la dissipation de chaleur requise, n’installez
pas cette unité dans un espace confiné tel qu’une bibliothèque
ou un endroit similaire.
• Une distance de plus de 0,3 m (12 po) est recommandée.
• Ne placez aucun matériel sur cet appareil.
zPara la dispersión del calor adecuadamente, no instale este
equipo en un lugar confinado tal como una librería o unidad
similar.
• Se recomienda dejar más de 0,3 m (12 pulg.) alrededor.
• No coloque ningún otro equipo sobre la unidad.
• Ne pas poser d’objet contenant du liquide, par
exemple un vase, sur l’appareil.
• Ne pas manipuler le cordon d’alimentation avec
les mains mouillées.
• 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.
II
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Getting started
Thank you for purchasing this Marantz product. To ensure proper
operation, please read this user guide carefully before using the
product.
Accessories
Check that the following parts are supplied with the product.
After reading them, be sure to keep them for future reference.
qUser guide...............................................................................1
wPower cord..............................................................................1
eRemote control cable ..............................................................1
Contents
Getting started··············································································1
w
e
Accessories ··················································································1
About this manual·········································································1
Features························································································2
Cautions on handling ····································································2
Part names·····················································································3
Front panel····················································································3
Rear panel·····················································································3
About this manual
Connections···················································································4
n Symbols
v
Preparations··················································································4
Speaker connections ····································································4
Example connection variation·······················································5
Connecting MM7055 with an AV pre-tuner (AV7005) ··················6
Connecting the power cord··························································7
Remote control connection ··························································7
Connection to an external control device ·····································8
This symbol indicates a reference page on which
related information is described.
This symbol indicates a supplementary information
and tips for operations.
This symbol indicates a supplementary information
and tips for operations.
NOTE
Operations ·····················································································9
n Illustrations
Turning the power on ···································································9
Turning the power standby···························································9
Switching the illumination lamp ON/OFF······································9
Setting the power to standby automatically
Note that the illustrations in these instructions are for explanation
purposes and may differ from the actual unit.
(Auto standby function) ································································9
Explanation of terms ··································································10
Troubleshooting··········································································10
Specifications ··············································································11
Index·····························································································11
1
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Features
Cautions on handling
• Before turning the power switch on
Check once again that all connections are correct and that there are
no problems with the connection cables.
BALANCED/UNBALANCED selecting function
Depending on the desired use, input for each channel can be
selected between BALANCED input and UNBALANCED input.
Current feedback discrete power amp
This is equipped with a current feedback power amp that uses the
complimentary push-pull circuit used in the SM-11S1 Marantz Hi-Fi
power amp. This amp provides increased operating stability, and
high-speed, wide ranging high-density playback.
• Power is supplied to some of the circuitry even when the unit is
set to the standby mode. When going on vacation or leaving home
for long periods of time, be sure to unplug the power cord from the
power outlet.
The current/voltage conversion amplification section in the latter
part of the power amp is equipped with a Wilson current mirror
circuit that amplifies to the high sound range with low distortion.
Remote Power Control
This unit is equipped with a remote power control function. When
a Marantz AV Pretuner AV8003 or AV7005 is connected to this
unit, this unit’s power can be switched ON/OFF together with the
AV8003 or AV7005 power supply.
• About condensation
If there is a major difference in temperature between the inside of
the unit and the surroundings, condensation (dew) may form on
the operating parts inside the unit, causing the unit not to operate
properly.
If this happens, let the unit sit for an hour or two with the power
turned off and wait until there is little difference in temperature
before using the unit.
Connection to the AV8003 or AV7005 is a ground floating
connection that prevents negative influences on sound quality as
far as possible.
Improved instant power supply capability
The final stage of the power amp is equipped with the same LAPT
(high efficiency power transistor) that is installed in the SM-11S1
Marantz Hi-Fi power amp, providing improved instant power supply
capability.
The power section is equipped with a large-sized transformer.
As one of the essential parts of the power section, this unit is
equipped with Marantz original 33,000 μF / 71 V×2 (MM7055), and
15,000 μF / 71 V×2 (MM7025) block condensers, which have been
repeatedly tested for sound quality.
Other Functions
Equipped with IR flash input that supports custom installations,
and DC trigger input and output terminals.
• Cautions on using mobile phones
Using a mobile phone near this unit may result in noise. If that
occurs, move the mobile phone away from this unit when it is in use.
• Moving the unit
These improvements to the power supply capability provide a
powerful, presence-filled sound.
Turn off the power and unplug the power cord from the power
outlet. Next, disconnect the connection cables to other system units
before moving the unit.
• About Care
High sound quality design based on pure surround
• Wipe the cabinet and control panel clean with a soft cloth.
• Follow the instructions when using a chemical cleaner.
• Benzene, paint thinner or other organic solvents as well as
insecticide may cause material changes and discoloration if brought
into contact with the unit, and should therefore not be used.
philosophy
Equipped with a chimney-shaped heat sink to efficiently process
the heat emitted from each channel amp , and exceptionally quiet
cooling fans. A high-sensitivity temperature sensor IC is used to
control the cooling fans, adjusting the rotation speed to match the
amount of heat generated by the amp.
These components provide the sound quality and low-noise you
would expect at a high-end theater.
In addition, this unit is designed for superb quality sound, and is
equipped with high quality components such as a high-end audio
condenser and film condenser throughout.
2
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Part names
Front panel
Rear panel
For buttons not explained here, see the page indicated in parentheses ( ).
See the page indicated in parentheses ( ).
n MM7055
n MM7055
q
w
e
rt y
u
qwe
r
ty
u
i
n MM7025
n MM7025
qw
e
r
t y u
i
q
w
e
rt y
u
qRCA input connectors (UNBALANCED) ·····(6) tFlasher input terminals
qPower switch (ON/STANDBY)····················(9) uDISPLAY button············································(9)
(FLASHER IN)················································(8)
yDC CONTROL jacks ······································(8)
uREMOTE CONTROL connectors··············(7, 8)
wXLR input connectors (BALANCED) ···········(6)
eInput selector················································(4)
rSpeaker terminals
• Press this button to turn the illumination lamp
ON/OFF.
• You can set the auto standby function by
wSTANDBY indicator······································(9)
eIllumination lamp ·········································(9)
rProtection indicator (PROTECT)············(9, 10)
tAuto power off indicator (A.P.OFF) ············(9)
yPower indicator ············································(9)
pressing and holding this button for more than
5 seconds.
(SPEAKER SYSTEMS) ··································(6) iAC inlet (AC IN)·············································(7)
3
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Connections
n XLR connector PIN arrangement
NOTE
• Do not plug in the power cord until all connections have been completed.
• When making connections, also refer to the operating instructions of the other components being
connected.
The PIN arrangement in this device uses the European method.
w
e
In the USA method,
is COLD, and
is HOT.
When connecting a device that utilizes the USA type of PIN arrangement, replace
• Check the channel, and then connect correctly.
w
e
the
and
plugs on one side of the balanced cable.
• Do not bundle power cords together with connection cables. Doing so can result in noise.
NOTE
Do not short the HOT and GND or COLD and GND for use.
Preparations
w
e
q
q GND (Ground)
w HOT (Hot)
e COLD (Cold)
Cables used for connections
Prepare the correct cables for use with the additional devices.
Audio cables
Balanced connections (XLR)
Speaker connections
Carefully check the channels of the speakers to be
connected to this unit (L/R/SL/SR/C) and + (red), –
(black), and connect like poles together.
NOTE
Balanced cable
• Connect so that the speaker cable core wires
do not protrude from the speaker terminal.
The protection circuit may be activated if the
core wires touch the rear panel or if the + and –
sidestoucheachother(vpage10“Protection
circuit”).
• Never touch the speaker terminals while the
power supply is connected. Doing so could
result in electric shock.
Unbalanced connections (RCA)
Audio cable
Connecting the speaker cables
Peel off about 10 mm of sheathing from the tip
of the speaker cable, then either twist the core
wire tightly or terminate it.
Speaker connections
Speaker cable
• Use speakers with impedance of 6 ohms or
more.
Sets the connected input connectors
Switches the input settings used for input to each channel.
BALANCED:
Set when connected to the XLR connector.
UNBALANCED: Set when connected to the RCA connector.
NOTE
If audio is input into input connectors that are not set using the input switching
switch, the audio will not be output from the speakers.
4
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Example connection variation
n Connection to an AV pre-tuner
[Speakers]
AV7005
MM7055
-X
FL
FL
C
C
FR
FR
SL
SR
SR
ET
5.1ch surround playback
7.1ch surround playback
N
ON
O
NE
EET
OE
O/F
ZNE 2
NF
AU
DIL
STS
B
HI U
L
AN
MM7055
SW
SL
MM7025
SBL SBR
MM7055
FL
C
FR
SL
Z2
SR
Z2
MM7025
MM7025
9.1ch surround playback
SBL SBR
FHL FHR
or
7.1ch surround playback
+
or
ZONE2 playback
n Connection to an AV receiver
Using both the AV receiver and the amplifier of this unit. Combine with an AV receiver that has a pre-out output.
SR7005
C
SL
FR
SR SBL SBR
MM7025
-X
ET
C
Front speaker upgrade
N
ON
O
NE
EE
OE
O/F
ZNE 2
NF
AU
DIL
STS
B
HI U
L
AN
FL
SW
n Connection to a 2ch pre-amp
MM7025
FL
FR
2ch playback
FL Front speaker (L)
FR Front speaker (R)
Z2 Zone2 speaker
C
Center speaker
SL Surround speaker (L)
SBL Surround back speaker (L)
SBR Surround back speaker (R)
FHL Front height speaker (L)
SW Subwoofer
SR Surround speaker (R)
FHR Front height speaker (R)
5
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Connecting MM7055 with an AV pre-tuner (AV7005)
The illustrations below show connection examples for performing 5.1-channel surround playback using the
MM7055 and AV pre-tuner (AV7005).
Unbalanced connections
(when connecting to the RCA input connectors)
AV pre-tuner AV7005
• For settings and operating procedures of the AV7005, see the AV7005 instruction manual.
• When connecting the AV7005, be sure to also consult the AV7005 instruction manual.
Balanced connections
(when connecting to the XLR input connectors)
AV pre-tuner AV7005
MM7055
UNBALANCED
BALANCED
MM7055
UNBALANCED
BALANCED
(FL)
(FR)
(SL)
(SR)
(C)
w
q
w
q
w
q
w
q
(FL)
(FR)
(SL)
(SR)
(C)
w
q
w
q
w
q
w
q
6
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Connecting the power cord
Remote control connection
Wait until all connections have been completed before connecting the power cord.
When connecting a Marantz AV8003 or AV7005 AV pre-tuner, you can switch the power of this unit to ON/
STANDBY together with the AV8003/AV7005 power supply.
n MM7055
For details, see the AV8003 or AV7005 instruction manual.
To household power outlet
(AC 120 V, 60 Hz)
Power cord
(supplied)
n MM7025
To household power outlet
(AC 120 V, 60 Hz)
MM7055
Power cord
(supplied)
NOTE
• Insert the plugs securely. Loose connections will result in the generation of noise.
• During power standby, a minimal amount of power is consumed. To totally cut off the power, remove
the power cord from the power outlet.
MM7025
7
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Connection to an external control device
q w e
r
eDC control input connector
(DC CONTROL IN)
qFlasher input connector (FLASHER IN)
Used when connecting a control box or other
control device to this unit, and using such a
device to control this unit.
Used when connecting a unit that has a DC
control input terminal to this device, and linking
the power ON/STANDBY of the connected
device with the power ON/STANDBY of this
unit.
wDC control output connector
(DC CONTROL OUT)
Used when connecting a device that has a DC
control input terminal to this unit, and linking
the power ON/STANDBY function of this device
with the power ON/STANDBY of the connected
device.
An electrical signal of max 12 V/44 mA is output
from the DC control output terminal.
For details, see the instruction manual of the
connected device.
For details, see the instruction manual of the
connected device.
NOTE
When a 5 V – 15 V voltage is input to the DC
control input terminal, the power of this unit
switches ON.
However, inputting voltage outside of this range
will cause damage to this unit.
NOTE
rRemote control connector
Used when connecting an external control
device to this unit, and using the device to
control this unit.
Do not use the DC control output terminal as the
power supply for an external device.
NOTE
When connecting a Marantz AV8003 or AV7005
AV pre-tuner, you can switch the power of this
unit to ON/STANDBY together with the AV8003/
AV7005 power supply.
For details, see the AV8003 or AV7005
instruction manual.
8
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Operations
Turning the power on
Switching the illumination lamp
n MM7055
ON/STANDBY
DISPLAY
When the power is in standby, press ON/STANDBY.
• The protection indicator flashes for approximately 7 seconds, and
the power switches on.
ON/OFF
If the unit is being used with the factory settings, the illumination lamp
lights.
You can turn the illumination lamp off if it is making the room too
bright at nighttime.
• The power indicator lights.
NOTE
Press DISPLAY.
When turning the power ON, turn the volume control of connected
devices down to the minimum.
Each time this button is pressed, the illumination lamp turns ON/
OFF.
Turning the power standby
STANDBY
indicator
Protection
Power indicator
Setting the power to standby
automatically
When the power is in power on, press ON/STANDBY.
indicator
The STANDBY indicator lights, and the power changes to standby.
(Auto standby function)
NOTE
Even if the unit is switched to standby, some of the circuits are still
active. If you will not be using this unit for a prolonged period (due to a
holiday etc), remove the power plug from the wall socket.
Furthermore, to prevent unexpected accidents, make sure the power
plug is located where it can be removed at any time.
When the auto standby function is set to ON, if there are no signals
input into this unit and no operations are performed for more than 30
minutes, the power of this unit automatically switches to standby.
• The factory setting is “Off”.
n MM7025
ON/STANDBY
DISPLAY
Press DISPLAY for more than 5 seconds.
The auto power off display switches as shown below according to
the auto standby function.
• When the auto standby function is ON: Lit
• When the auto standby function is OFF: Off
STANDBY
indicator
Protection
indicator
Power indicator
9
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Explanation of terms
Troubleshooting
P
If a problem should arise, first check the following:
1. Are the connections correct?
Protection circuit
This is a function to prevent damage to components within the power 2. Is the set being operated as described in the user guide?
supply when an abnormality such as an overload or excess voltage 3. Are the other components operating properly?
occurs for any reason.
If this unit does not operate properly, check the items listed in the table below. Should the problem persist, there may be a malfunction.
In this unit, the STANDBY indicator and protection indicator blinks and In this case, disconnect the power immediately and contact your store of purchase.
the unit enters standby mode when an abnormality occurs.
Symptom
Cause/Solution
Page
S
The power does not switch on.
Or, the power switches off immediately after • The protective circuit has operated. In this case, remove the power plug
being switched on.
• Check that the power plug is inserted correctly in the wall socket.
7
7, 10
Speaker impedance
This is certain-rated resistance of the speaker set to an alternating
current and expressed in ohms.
The smaller the impedance, the greater the output.
However, load on the amplifier is increased. Use speakers whose
impedance is supported by this unit.
from the wall socket, and wait for at least 1 minute before inserting it in the
wall socket again.
There is no sound from the speakers.
• Check the speaker connections and connections to the other devices.
• Alter the input selector to match the input connector (BALANCED or
UNBALANCED) of the connected device.
6
4
The power suddenly switches off during use, • The internal temperature of the unit has increased, causing the protective
and the STANDBY indicator and protection circuit to operate. Remove the power plug from the wall socket, wait until
indicator flash at approximately 0.5 second the temperature of the unit has dropped adequately, and then insert the
–
intervals.
power plug back into the wall socket.
• Install this unit in a well-ventilated location.
–
4
• Use speakers that have the specified impedance.
• If the two core wires of the speaker cables are touching, or if a core wire
is out of the terminal causing the core wire to touch the rear panel of this
unit, the protective circuit will operate. Remove the power plug from the
wall socket, and firmly re-insert the core wire, or fix the terminal before
reconnecting it.
4, 10
–
• Turn the volume down on the amp connected to this unit, and insert the
power plug again.
When the power switches off suddenly • The protective circuit has operated. In this case, remove the power plug
during use, the STANDBY indicator flash from the wall socket, re-examine the installation conditions of this unit, and
at approximately 0.1 second intervals and check the speaker cable connections. If the same situation occurs when the
protection indicator flash at approximately 0.5 power is switched on again, contact the Marantz Service Center.
second intervals.
6, 7, 10
10
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Specifications
Index
vNumerics
2ch playback·························································5
5.1ch surround playback ······································5
7.1ch surround playback ······································5
9.1ch surround playback ······································5
n MM7055
vS
Rated power output
(from 20 Hz to 20 kHz/THD = 0.08 %,
two channels driven):
Maximum effective output power
(from 1 kHz, two channels driven):
Output bandwidth (8 Ω load, 0.09 %):
Frequency response (1 W, 8 Ω):
Damping factor:
140 W/ch, 8 Ω
170 W/ch, 6 Ω
Speaker cable·······················································4
Speaker impedance············································10
Switches the connected input connectors···········4
Switching the illumination lamp ON/OFF·············9
210 W/ch, 6 Ω
5 Hz – 40 kHz
8 Hz – 100 kHz ( 3 dB)
100
1.2 V / 22 kΩ (UNBALANCED)
2.4 V / 30 kΩ (BALANCED)
105 dB
29 dB
AC 120 V, 60 Hz
660 W
0.2 W
vA
vT
Accessories··························································1
Audio cable···························································4
Auto standby function··········································9
Troubleshooting ·················································10
Turning the Power On··········································9
Turning the power standby ··································9
Input sensitivity/impedance:
Signal-to-noise ratio (IHF-A):
Voltage amplifi cation level:
Supply voltage:
Power consumption:
Standby power:
vB
vX
Balanced cable ·····················································4
XLR connector PIN arrangement ·························4
Maximum external dimensions:
Weight:
440 (W) x 183 (H) x 384 (D) mm
15.7 kg
vC
Condensation ·······················································2
Connection
Power cord·························································7
Connections
Balanced ····························································6
External control device ······································8
Power cord·························································7
Remote control··················································7
Unbalanced························································6
n MM7025
Rated power output
140 W/ch, 8 Ω
170 W/ch, 6 Ω
(from 20 Hz to 20 kHz, two channels
driven):
Maximum effective output power
(from 1 kHz, two channels driven):
Output bandwidth (8 Ω load, 0.09 %):
Frequency response (1 W, 8 Ω):
Damping factor:
210 W/ch, 6 Ω
5 Hz – 40 kHz
8 Hz – 100 kHz ( 3 dB)
100
Input sensitivity/impedance:
1.2 V / 22 kΩ (UNBALANCED)
2.4 V / 30 kΩ (BALANCED)
vE
Signal-to-noise ratio (IHF-A):
Voltage amplifi cation level:
Supply voltage:
Power consumption:
Standby power:
105 dB
29 dB
AC 120 V, 60 Hz
330 W
Example connection variation ······························5
vF
For expanding to front height speakers or front
wide speakers······················································5
Front panel ···························································3
Front speaker upgrade ·········································5
0.2 W
Maximum external dimensions:
Weight:
440 (W) x 126 (H) x 352 (D) mm
10.8 kg
For purposes of improvement, specifications and design are subject to change without notice.
vP
Protection circuit ················································10
vR
Rear panel ····························································3
11
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Dimensions / Dimensions / Dimensioni
n MM7055
n MM7025
Unit : mm (in)
Unit : mm (in)
440.0 (17 3/8)
440.0 (17 3/8)
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D&M Holdings Inc.
Printed in China 5411 10586 001M
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