Marantz MM8077 7 Channel Power Amplifier

Safety Precautions

CAUTION: RISK OF ELECTRIC SHOCK DO NOT OPEN

To reduce the risk of electric shock, do not remove the cover (or back). No user-serviceable parts inside. Refer servicing to qualified service personnel.

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.

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.

CAUTION: 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.

Important Safety Instructions

• Read and keep these instructions.
• Heed all warnings and follow all instructions.
• Do not use this apparatus near water.
• Clean only with a dry cloth.
• Do not block any ventilation openings.
• Install in accordance with the manufacturer's instructions.
• Do not install near heat sources like radiators, heat registers, stoves, or other apparatus that produce heat.
• Do not defeat the safety purpose of polarized or grounding-type plugs. If the provided plug does not fit your outlet, consult an electrician for replacement.
• Protect the power cord from being walked on or pinched, especially at plugs and where it exits the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Use only with specified carts, stands, tripods, brackets, or tables. Use caution when moving cart/apparatus combinations to avoid tip-over injuries.
• Unplug during lightning storms or when unused for long periods.
• Refer all servicing to qualified service personnel. Servicing is required if the apparatus is damaged (cord, plug, spilled liquid, dropped objects, exposed to rain/moisture, not operating normally, or dropped).
• Batteries shall not be exposed to excessive heat such as sunshine or fire.

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.

FCC Information (For US Customers)

This product complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) it may not cause harmful interference, and (2) it must accept any interference received, including interference that may cause undesired operation.

IMPORTANT NOTICE: DO NOT MODIFY THIS PRODUCT. Modifications not expressly approved by Marantz may void your authority to use the product.

This product has been tested and found to comply with the limits for a Class B digital device. These limits are designed to provide reasonable protection against harmful interference in a residential installation. If this product causes harmful interference to radio or television reception, try to correct it by:

• Reorienting or relocating the receiving antenna.
• Increasing the separation between the equipment and receiver.
• Connecting the product to a different circuit outlet.
• Consulting the local retailer or an experienced radio/TV technician.

For Canadian customers: This Class B digital apparatus complies with Canadian ICES-003.

Notes on Use

WARNINGS

• Avoid high temperatures. 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.

Cautions on Installation

• For proper heat dispersal, do not install this unit in a confined space, such as a bookcase or similar enclosure. A clearance of more than 12 inches (0.3 m) is recommended. Do not place any other equipment on this unit.

Getting Started

Thank you for purchasing this Marantz product. To ensure proper operation, please read this user guide carefully before using the product. After reading, be sure to keep it for future reference.

Contents

• Getting started: Page 1
• Accessories: Page 1
• About this manual: Page 1
• Features: Page 2
• Cautions on handling: Page 2
• Part names: Page 3
• Connections: Page 4
• Operations: Page 9
• Explanation of terms: Page 10
• Troubleshooting: Page 10
• Specifications: Page 11
• Index: Page 11

Accessories

Check that the following parts are supplied with the product:

• Owner's Manual
• Warranty card (for USA)
• Warranty card (for CANADA)
• Power cord
• Remote control cable

About This Manual

Symbols

• [Reference Page] (v): Indicates a reference page on which related information is described.
• [Note] (n): Indicates supplementary information and tips for operations.

Illustrations

Note that the illustrations in these instructions are for explanation purposes and may differ from the actual unit.

Features

Current Feedback Discrete Power Amp

This unit features a current feedback power amplifier using the complimentary push-pull circuit found in Marantz Hi-Fi power amplifiers. This design provides increased operating stability and high-speed, wide-ranging high-density playback. The current/voltage conversion amplification section incorporates a Wilson current mirror circuit, amplifying the high sound range with low distortion.

Improved Instant Power Supply Capability

The final stage of the power amplifier is equipped with the same LAPT (high efficiency power transistor) used in Marantz Hi-Fi power amplifiers, ensuring improved instant power supply capability. The power section includes a large-sized transformer and Marantz original 50,000 µF / 71 V x 2 block condensers, tested for sound quality, contributing to a powerful, presence-filled sound.

High Sound Quality Design Based on Pure Surround Philosophy

The unit utilizes a chimney-shaped heat sink for efficient heat dissipation from each channel amplifier and exceptionally quiet cooling fans. A high-sensitivity temperature sensor IC controls the cooling fans, adjusting rotation speed based on heat generation. These components deliver the sound quality and low-noise expected from a high-end system. The design also incorporates high-quality components like high-end audio condensers and film condensers.

BALANCED/UNBALANCED Selecting Function

Input for each channel can be selected between BALANCED and UNBALANCED input, depending on your desired use.

Remote Power Control

This unit is equipped with a remote power control function. When connected to a Marantz AV Pre Tuner AV8801 or AV7701, this unit's power can be switched ON/OFF simultaneously with the AV8801 or AV7701 power supply. The connection to the AV8801 or AV7701 is a ground floating connection, designed to minimize negative influences on sound quality.

Other Functions

The unit includes an IR flash input for custom installations and DC trigger input and output terminals.

Part Names

Front Panel

Components on the front panel include:

• 1 Power operation button (ON/STANDBY): Turns the unit on or puts it into standby mode.
• 2 STANDBY indicator: Shows the standby status.
• 3 Illumination lamp: Illuminates the front panel.
• 4 Protection indicator (PROTECT): Indicates if the protection circuit has been activated.
• 5 Auto power off indicator (A.P.OFF): Shows the status of the auto standby function.
• 6 Power indicator: Lights when the unit is powered on.
• 7 DISPLAY button: Toggles the illumination lamp ON/OFF. Pressing and holding for more than 5 seconds sets the auto standby function.

Rear Panel

Components on the rear panel include:

• 1 RCA input connectors (UNBALANCED): For unbalanced audio connections.
• 2 Input selector: Selects between BALANCED and UNBALANCED inputs.
• 3 XLR input connectors (BALANCED): For balanced audio connections.
• 4 Speaker terminals (SPEAKER SYSTEMS): For connecting speakers.
• 5 FLASHER IN jack: For connecting an external control device.
• 6 DC CONTROL jacks: For DC control input and output.
• 7 REMOTE CONTROL connectors: For remote control connections.
• 8 AC inlet (AC IN): For connecting the power cord.

Connections

Note: Do not plug in the power cord until all connections have been completed. Refer to the operating instructions of other components being connected. Check channels and connect correctly. Do not bundle power cords with connection cables to avoid noise.

Preparations

Prepare the correct cables for use with additional devices.

Cables Used for Connections

• Balanced connections (XLR): Use balanced audio cables.
• Unbalanced connections (RCA): Use audio cables.
• Speaker connections: Use speaker cables.

XLR Connector PIN Arrangement

This device uses the European method for XLR connector PIN arrangement. In the USA method, pin 2 is COLD and pin 3 is HOT. If connecting a device using the USA type, swap the plugs on one side of the balanced cable. Do not short the HOT and GND or COLD and GND.

Speaker Connections

Carefully check the channels of the speakers (L/R/SL/SR/C) and connect like poles (+ to red, - to black) together. Peel off approximately 10 mm (0.03 ft) of sheathing from the speaker cable tip, then twist the core wire tightly or terminate it.

Note: Ensure speaker cable core wires do not protrude from the terminal. Avoid touching the + and - sides together or touching the rear panel, as this may activate the protection circuit. Never touch speaker terminals while the power supply is connected, as this could result in electric shock. Use speakers with an impedance of 6 to 8 Ω.

Sets the Connected Input Connectors

Switch the input settings for each channel. Select BALANCED when connected to the XLR connector and UNBALANCED when connected to the RCA connector. If audio is input into connectors not set via the input switching switch, no audio will be output from the speakers.

Example Connection Variation

Connection to an AV Pre-Tuner

The document illustrates various connection configurations for the MM8077 with an AV pre-tuner (AV8801) and optional MM7055, enabling different surround sound playback modes like 7.1ch, 11.1ch, and 9.1ch, as well as ZONE2/ZONE3 playback. Speaker labels such as Front Left (FL), Center (C), Front Right (FR), Surround Left (SL), Surround Right (SR), Surround Back Left (SBL), Surround Back Right (SBR), Front Height Left (FHL), Front Height Right (FHR), Front Wide Left (FWL), Front Wide Right (FWR), and Zone 2/3 speakers (Z2, Z3) are defined.

Connecting MM8077 with an AV Pre-Tuner (AV8801)

The following illustrations show connection examples for performing 7.1-channel surround playback using the MM8077 and AV pre-tuner (AV8801). For settings and operating procedures of the AV8801, consult its owner's manual.

Balanced Connections (When connecting to XLR input connectors)

Diagram shows AV8801 balanced XLR outputs connected to MM8077 balanced XLR inputs for each channel (FL, FR, SL, SR, SBL, SBR, C).

Unbalanced Connections (When connecting to RCA input connectors)

Diagram shows AV8801 unbalanced RCA outputs connected to MM8077 unbalanced RCA inputs for each channel (FL, FR, SL, SR, SBL, SBR, C).

Connecting the Power Cord

Wait until all connections have been completed before connecting the power cord. Connect the supplied power cord to the AC IN inlet on the MM8077 and to a household power outlet (AC 120 V, 60 Hz).

Note: Insert the plugs securely. Loose connections can generate 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.

Remote Control Connection

When connecting a Marantz AV8801 AV pre-tuner, you can switch the power of this unit to ON/STANDBY together with the AV8801 power supply. For details, see the AV8801 owner's manual. A diagram shows the remote control output from the AV8801 connected to the REMOTE CONTROL connector on the MM8077.

Connection to an External Control Device

The MM8077 features several external control connectors:

• 1 Flasher input connector (FLASHER IN): Used for connecting a control box or other control device to manage this unit.
• 2 DC control output connector (DC CONTROL OUT): Used to link the power ON/STANDBY function with a connected device that has a DC control input terminal. An electrical signal of max 12 V/44 mA is output. Note: Do not use this as a power supply for an external device. When using this unit with a device connected to the DC control connector, set the auto standby function to "Off".
• 3 DC control input connector (DC CONTROL IN): Used to link the power ON/STANDBY of a connected unit with this unit's power ON/STANDBY. Inputting a voltage between 5 V – 15 V switches the unit ON; voltages outside this range can cause damage. Note: When using this unit with a device connected to the DC control connector, set the auto standby function to "Off".
• 4 Remote control connector: Used for connecting an external control device to control this unit. When connecting a Marantz AV8801 or AV7701 AV pre-tuner, its power can be switched ON/STANDBY together with the pre-tuner's power supply. Refer to the AV8801 or AV7701 owner's manual for details.

Operations

Turning the Power On

When the power is in standby, press the ON/STANDBY button. The protection indicator will flash for approximately 7 seconds, and then the power indicator will light, signifying the unit is on. Note: When turning the power ON, turn the volume control of connected devices down to the minimum.

Turning the Power Standby

When the power is on, press the ON/STANDBY button. The STANDBY indicator lights, and the power changes to standby. Note: Even in standby, some circuits remain active. For prolonged periods of non-use, unplug the power cord from the wall socket. Ensure the power plug is accessible for easy removal.

Switching the Illumination Lamp ON/OFF

If the unit is being used with factory settings, the illumination lamp is lit. You can turn it off if it is too bright. Press the DISPLAY button; each press toggles the illumination lamp ON/OFF.

Setting the Power to Standby Automatically (Auto Standby Function)

When the auto standby function is set to ON, the unit automatically switches to standby if there are no signals input and no operations are performed for more than 30 minutes. The factory setting is "Off". To change the setting, press the DISPLAY button for more than 5 seconds. The auto power off display will indicate ON or OFF status. Note: When using the "Setup Assistant" or "Speaker Setup" function on an AV7701 or AV8801 used with this unit, set the auto standby function to "Off" on this unit.

Explanation of Terms

Protection Circuit

This is a function to prevent damage to components within the power supply from abnormalities like overload or excess voltage. In this unit, the STANDBY indicator and protection indicator blink, and the unit enters standby mode when an abnormality occurs.

Speaker Impedance

This is the rated resistance of the speaker set to alternating current, expressed in ohms. Lower impedance generally results in greater output but increases the load on the amplifier. Use speakers with impedance supported by this unit.

Troubleshooting

If a problem arises, first check the following:

1. Are the connections correct?
2. Is the set being operated as described in the user guide?
3. Are the other components operating properly?

If the unit does not operate properly, check the items in the table below. If the problem persists, there may be a malfunction. Disconnect power immediately and contact your store of purchase.

Specifications

For purposes of improvement, specifications and design are subject to change without notice.

Dimensions and Weight

Dimensions

Unit: in. (mm)

• Width: 17 21/64 (440.0)
• Height: 6 23/32 (170.5)
• Depth: 15 3/32 (383.5)
• Front panel height: 2 13/64 (56.0)
• Rear panel height: 10 33/64 (267.0)
• Side panel height (front): 1 31/32 (50.0)
• Side panel height (rear): 1 31/32 (50.0)
• Front feet height: 1 31/32 (50.0)
• Rear feet height: 2 13/64 (56.0)
• Top clearance: 27/32 (21.5)
• Front panel depth (excluding knobs): 7 9/32 (185.0)
• Rear panel depth (excluding connectors): 5/64 (2.0)
• Connector depth: 1 9/16 (39.5)
• Bottom clearance: 37/64 (14.5)
• Front panel depth (including knobs): 13 25/64 (340.0)
• Rear panel depth (including connectors): 2 3/16 (55.5)

Weight

39 lbs 11 oz (18.0 kg)