Bedienungsanleitung Marantz MM7025 (Seite 8 von 20) (Englisch)

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Features

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.

The current/voltage conversion ampliﬁ cation section in the latter

part of the power amp is equipped with a Wilson current mirror

circuit that ampliﬁ es to the high sound range with low distortion.

Improved instant power supply capability

The ﬁ nal stage of the power amp is equipped with the same LAPT

(high efﬁ ciency 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.

These improvements to the power supply capability provide a

powerful, presence-ﬁ lled sound.

High sound quality design based on pure surround

philosophy

Equipped with a chimney-shaped heat sink to efﬁ ciently 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 ﬁ lm condenser throughout.

BALANCED/UNBALANCED selecting function

Depending on the desired use, input for each channel can be

selected between BALANCED input and UNBALANCED input.

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.

Connection to the AV8003 or AV7005 is a ground ﬂ oating

connection that prevents negative inﬂ uences on sound quality as

far as possible.

Other Functions

Equipped with IR ﬂ ash input that supports custom installations,

and DC trigger input and output terminals.

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.

• 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.

• 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.

• 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

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

• 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.

MM7055_7025N_ENG_5th_0729.indd 2MM7055_7025N_ENG_5th_0729.indd 2 2010/07/29 21:49:372010/07/29 21:49:37

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