Marantz MM7055 Power Amplifier
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
Marantz - MM7055
140W 5-CHANNEL CURRENT FEEDBACK POWER AMPLIFIER
The 5 channel MM7055 is expertly crafted to meet all your high power needs with 140W per channel and drives even the most demanding surround speaker setups. The entire unit is designed to deliver consistent and precise power whenever needed.
KEY FEATURES:
Power For Your System
The MM7055 power amplifier produces 140 watts per channel (8-ohm, 20Hz – 20kHz, 0.08% THD, 2ch. drive) of high current output from each of its five channels.
The Many Faces Of Excellence
In practical terms, the MM7055 is ideal for a “5.1” home theatre system, whether based on a moderately powered receiver or a surround sound processor. Two or more can be used to build an advanced system. A combination with MM7025 or MM8077 is possible.
More Marantz Power
A massive power supply includes a multiple-secondary EI-core transformer and over 65,000 µF of custom-designed energy storage capacity.
Cool Machine, Warm Sounds
Physically, the MM7055’s output stages mount on an extruded aluminum “thermal tunnel” for efficient heat dissipation.
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.
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.
DC-Trigger
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.
MM7055 | |
|---|---|
| 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 |
| CCNE | No |
| Liniear volume control | No |
| BTL Possibility | No |
| BI-AMP and Multichannel option | No |
| Choke input | No |
| Shottky diodes | No |
| Input buffer amp (all inputs / CD only) | 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 Metre : Analogue / 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 Outputs | No |
| Balanced In / Out | 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 of terminals | 5 |
| D-Bus | Yes |
| Floating Control Bus (3.5 mm mono jack x 2) | No |
| Remote Power Control Trigger - In Out | Yes |
| Flasher In / IR Receiver In | Yes / No |
| Headphone Out | No |
| iPod input (direct / docking station) | No / No |
| |
| Power Output (8 / 4 Ohm RMS) | 140 W / 170 W (6) |
| Power Output (8 / 4 Ohm DIN) | No |
| Power Output (8 / 4 Ohm IHF) | No |
| Bridged Power Output (8 Ohm RMS) | No |
| Frequency response | 8 Hz-100 kHz (+-3 dB) |
| Total Harmonic Distortion | 0.03% (20 Hz - 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 off | Yes |
| Detachable Power Cable | Yes |
| Remote Control | No |
| System Remote Function | No |
| Maximum Dimensions (W x D x H) in mm | 440 x 183 x 384 |
| Weight in kg | 15.2 |