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Marantz MM7055 5ch Power Amplifier

by Marantz


Marantz MM7055 Power Amplifer.

The new MM7055 is the five-channel option in this  year’s extended line-up of main amplifiers .

Based on the technology used in the MM8003 and using the exact same chassis, it delivers a thumping 140W rms into 8 ohm to each of the channels, while the ultra-wide bandwidth current feedback technology easily handles the highest SACD frequencies - this also makes it ideal for the high definition DTS Master Audio and Dolby TrueHD formats too.

The result? Totally precise tonal and image balance, speed and dynamics.

And on top of all that, you also get XLR audio inputs, DC triggers and a Marantz control bus system for remote on/off.

There’s even a stylish new display screen showing the actual output power. This is power and convenience to take your breath away.

Marantz MM7055 At A Glance:

  • 5 x 140W RMS 8 ohm
  • Current Feedback circuitry
  • Balanced inputs
  • Gold plated speaker terminals
  • DC trigger control inputs
  • Marantz remote bus



Current Feedback
Current Feedback amplification is a well known, Marantz’ original circuit technology. The Current Feedback amplifier technology fits perfectly with the high requirements set for Super Audio software providing wide-bandwidth, high-speed reproduction. The impedance at the Current Feedback point is limited resulting in a very low phase shift. Marantz receivers and amplifiers equipped with Current Feedback can keep the phase compensation via Negative FeedBack (NFB) to a minimum, resulting in high through-rate, excellent transient response and superb sonic transparency for the full bandwidth. Unlike conventional Voltage Feedback amplification, the Current Feedback amplification makes the power amplifier in-sensitive to difficult loudspeaker loads.

Customized Components
On paper an electrical component might look excellent but the result may fall short of the combined design expectations. Marantz selects the appropriate components for the specific design application. In some cases it’s simply not possible to use standard components that meet the high Marantz standards. These components will then be specially made for Marantz in close cooperation with the Marantz engineers.

A DC trigger is an assignable voltage output which can automatically control for example an electrical projection screen, lowering it when the DVD input is chosen on the receiver.

IR Flasher IN
The IR-Flasher IN is a standardized connection to control the AV system by external IR receivers independent of the infra red control format used. On the IR-Flasher OUT an IR-Emitter can be connected to controlled third brand components. The third connection link to this is the IR-Receiver INPUT which is similar to the IR-Flasher In, but it outputs a voltage to directly feet an external IR-Receiver eye. Please check capability per product in the specification section.

Linear drive power supply
LDPS - Marantz own technology to design a power supply capable to follow all details of an audio signal to reproduce the finest sound quality.



Channels 5
Current Feedback Topology Yes
Phono EQ: Standard / Current Feedback / Constant Current Feedback No / No / No
HDAM version No
Power Transformer: Toroidal / El No / Yes
High Grade Audio Components Yes
Customised Components Yes
Symmetric PCB Layout No
Aluminium extrusion heat sink Yes
Copper plated chassis No
Tri Tone Control (Bass / Mid / Treble) No
Balance / Bass / Treble / Loudness No

Linear Drive Power Supply Yes
Liniear volume control No
BTL Possibility No
BI-AMP and Multichannel Yesption No
Choke input No
Shottky diodes No
Input buffer amp (all inputs / CD Yesnly) Yes / No
Separate Solid Heat Sinks No
System block shielding: copper / metal / none No / No / No
Double Layer Bottom Plate No
Low noise LCD display Yes
Low noise LED display No
Power Meter : Analog / Digital No / Yes
Source Direct No
Power Amp direct Yes
Standby Mode Yes
5mm aluminium top plate No

Audio Inputs No
Phono Input: MM / MC No
Audio Yesutputs No
Balanced In / Yesut 5 / No
Pre-out / Main-in No / 5
Power Amp Direct IN No
Gold Plated Cinch No
Speaker A / B No
Speaker Terminal: Screw / Marantz / WBT Yes / No / No
Number Yesf terminals 5
D-Bus Yes
Floating Control Bus (3.5 mm mono jack x 2) No
Remote Power Control (Trigger No In / Yesut ) Yes
Flasher In / IR Receiver In Yes / No
Headphone Yesut No
iPod input (direct / docking station) No / No

Power Yesutput (8 / 4 Yeshm RMS) 140 W / 170 W (6)
Power Yesutput (8 / 4 Yeshm DIN) No
Power Yesutput (8 / 4 Yeshm IHF) No
Bridged Power Yesutput (8 Yeshm RMS) No
Frequency Response 8 Hz-100 kHz (+-3 dB)
Total Harmonic Distortion 0.03% (20 Hz No 20 kHz)
Damping Factor 100
Input Sensitivity: MM No
Input Sensitivity: MC No
Signal to Noise Ratio: MM / MC No
Input Sensitivity: High level 1.2 V / 22 K
Input Sensitivity: Balanced High level 2.4 V / 30 K
Signal to Noise Ratio: High level 105 dB

Available colors: Gold / Silver / Black / Silver-Gold No / No / Yes / No
Metal Front Panel Yes
Power Consumption in W 400
Standby Consumption in W 0.4
Auto power Yesff Yes
Detachable Power Cable Yes
Remote Control No
System Remote Function No
Maximum Dimensions (W x H x D) in mm 440 x 183 x 384
Weight in kg 15.2