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MARANTZ - 5-Channel Power Amplifer - MM7055


Quick Overview

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.

MARANTZ - 5-Channel Power Amplifer  - MM7055

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Power For Your System

The MM7055 power amplifier produces 140 watts of high current output from each of its five channels.  This is “real world” power, too, measured across the full audio bandwidth (20 Hz – 20 kHz) at 8 ohms with 0.08% Total Harmonic Distortion.  Among other attributes, this means the MM7055 is capable of long-term power delivery into low impedance speakers.

The Many Faces of Excellence

In practical terms, the MM7055 is ideal for a “5.1” home theater system, whether based on a moderately powered receiver or a surround sound processor.  You can use it to power speakers in different areas of your home; stereo reproduction in two rooms plus a mono channel for secondary areas such as a den or kitchen.  For more complex home theater systems, the MM7055 pairs with one or several MM7025s to help create a totally immersive “7.1” or “9.1” audio experience.

Inside The MM7055

A massive power supply includes a multiple-secondary EI-core transformer and over 65,000 µF of custom-designed energy storage capacity.  Critical circuit components from many world-class suppliers were chosen only after extensive listening tests.  Among these, the LAPT Hyper Power output devices were first used in Reference Series components.  Current feedback topology insures astounding accuracy and control under high-drive conditions.

A Temperature-Controlled Environment

Physically, the MM7055’s output stages mount on an extruded aluminum “thermal tunnel” for efficient heat dissipation.  With temperature-sensing forced air cooling, this configuration assures cool operating temperatures for long-term reliability, even when making full use of the amplifier’s substantial output capabilities.

Flexible Connections

Balanced inputs and single-ended RCA inputs are both supported, and you can choose either type of input for each channel, individually, for easy and flexible connectivity.  Audiophile grade, gold-plated four-way binding post speaker terminals insure tight connections to your choice of speaker wire.

Custom Touches

The MM7055 includes input and output jacks for DC “trigger” pulses as well as RC-5 jacks for total remote control convenience, even with legacy Marantz products.

The chassis itself is heavy gauge steel for maximum isolation from external vibration as well as electromagnetic and radio frequency interference.  And chassis depth is less than 14½” so the MM7055 will fit quite nicely on a shelf, in a cabinet, or in a conventional system rack with the optional rack mount kit RMK8003MM.

Power.  Functionality.  Dependability.  And classic looks.  The MM7055 is, simply speaking, a Marantz.

Product Specifications




  • Features
  • Channels 5
    Current Feedback Topology o
    Phono EQ: Standard / Current Feedback / Constant Current Feedback - / - / -
    HDAM version -
    Power Transformer: Toroidal / El - / o
    High Grade Audio Components o
    Customised Components o
    Symmetric PCB Layout -
    Aluminium extrusion heat sink o
    Copper plated chassis -
    Tri Tone Control (Bass / Mid / Treble) -
    Balance / Bass / Treble / Loudness -
  • Others
  • Linear Drive Power Supply o
    CCNE -
    Liniear volume control -
    BTL Possibility -
    BI-AMP and Multichannel option -
    Choke input -
    Shottky diodes -
    Input buffer amp (all inputs / CD only) o / -
    Separate Solid Heat Sinks -
    System block shielding: copper / metal / none - / - / -
    Double Layer Bottom Plate -
    Low noise LCD display o
    Low noise LED display -
    Power Meter : Analog / Digital - / o
    Source Direct -
    Power Amp direct o
    Standby Mode o
    5mm aluminium top plate -
  • Inputs/Outputs
  • Audio Inputs -
    Phono Input: MM / MC -
    Audio Outputs -
    Balanced In / Out 5 / -
    Pre-out / Main-in - / 5
    Power Amp Direct IN -
    Gold Plated Cinch -
    Speaker A / B -
    Speaker Terminal: Screw / Marantz / WBT o / - / -
    Number of terminals 5
    D-Bus o
    Floating Control Bus (3.5 mm mono jack x 2) -
    Remote Power Control (Trigger - In / Out ) o
    Flasher In / IR Receiver In o / -
    Headphone Out -
    iPod input (direct / docking station) - / -
  • Specifications
  • Power Output (8 / 4 Ohm RMS) 140 W / 170 W (6)
    Power Output (8 / 4 Ohm DIN) -
    Power Output (8 / 4 Ohm IHF) -
    Bridged Power Output (8 Ohm RMS) -
    Frequency Response 8 Hz-100 kHz (+-3 dB)
    Total Harmonic Distortion 0.03% (20 Hz - 20 kHz)
    Damping Factor 100
    Input Sensitivity: MM -
    Input Sensitivity: MC -
    Signal to Noise Ratio: MM / MC -
    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
  • General
  • Available colors: Gold / Silver / Black / Silver-Gold - / - / o / -
    Metal Front Panel o
    Power Consumption in W 400
    Standby Consumption in W 0.4
    Auto power off o
    Detachable Power Cable o
    Remote Control -
    System Remote Function -
    Maximum Dimensions (W x D x H) in mm 440 x 384 x 183
    Weight in kg 15.2



Quick Links

MM7055 Product Information                                             

MM7055 Instruction Manual

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