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Marantz MM7055 Black 5ch Power Amplifier


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Condition: New

Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).


Limited 2-3 year warranty.  More info

Rated 4.7/5 based on 3 customer reviews

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The Marantz MM7055 is a five channel power amplifier, that 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 being precise tonal and image balance, speed and dynamics. The unit also features XLR audio inputs, DC triggers and a Marantz control bus system for remote on/off. There is even a stylish new display screen showing the actual output power.

Current Feedback

Current Feedback

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.

IR Flasher IN

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.

Customized Components

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

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.

Power Supply

Power Supply

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

  • Tick 5ch power amplifier
  • Tick 5x 140W (8ohm) / 5x 170W (6ohm)
  • Tick Current Feedback circuitry
  • Tick High performance power supply
  • Tick XLR inputs
  • Tick DC Trigger control inputs

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.


Channels 5
Current Feedback Topology Yes
Power Transformer EL
High Grade Audio Components Yes
Customised Components Yes
Aluminium Extrusion Heat Sink Yes


Linear Drive Power Supply Yes
Input buffer amp (all inputs / CD only) Yes / No
Low noise LCD display Yes
Power Meter Digital
Power Amp Direct Yes
Standby Mode Yes

Inputs / Outputs

Balanced In / Out 5 / None
Pre-out / Main-in None / 5
Speaker Terminal Screw
Number of terminals 5
D-Bus Yes
Remote Power Control (Trigger - In / Out ) Yes
Flasher In / IR Receiver In Yes / No


Power Output (8 / 4 Ohm RMS) 140 W / 170 W (6)
Frequency Response 8 Hz-100 kHz (+-3 dB)
Total Harmonic Distortion 0.03% (20 Hz - 20 kHz)
Damping Factor 100
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 colours Black
Metal Front Panel Yes
Power Consumption 400W
Standby Consumption 0.4W
Auto power off Yes
Detachable Power Cable Yes
Maximum Dimensions (W x H x D) 440 x 183 x 384mm
Weight 15.2kg

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Part Exchange Available

Looking to upgrade and not sure what to do with your old gear? Trade-in with us and take the hassle out of finding a new home for your equipment.

We can take back any type of product we sell, from cables, to projectors, speakers, amplifiers, AV receivers, subwoofers and more.

Just fill in the form below and we'll get back to you.

Please note we don't purchase second hand goods for cash, we take trade-ins as part payment towards the purchase of new equipment.

PayPal Credit - Flexible Credit

Buy Now, Pay Later: Get 4 months 0% finance when you spend £99 or more. Look for the PayPal Credit button when making your purchase.

More information on PayPal Credit is available here.

Klarna Finance - Pay Monthly

Pay monthly plans for up to 48 months, available on purchases between £299 and £25,000.

0% ONIF6 6 Months
0% ONIF12 12 Months
0% ONIF24 24 Months
0% ONIF36 36 Months
0% ONIF48 48 Months

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Deposit variable between 10% and 50%, subject to a minimum loan value of £250.


Please note: These finance quotes are for a single purchase of the product listed on this page, at the price shown. Adding additional products or quantities to your order, or using any vouchers or other discounts will result in changes to the quotes and available terms.

For further information please visit the finance page.

All of our reviews are provided by real customers with verified purchases.

Reviews for this product.

03 December 2019


Solid built , provides much needed power to the rear speakers .The sound is impressive for the price of the unit .
10 August 2016

- West Midlands

Great power Amp brought more life to my speakers and fast deliver to great service
06 September 2016

- Lancashire

No comment provided by customer.


Stock information not available for this product, please contact us for more details.

Please see our stock information page for more details on how we show stock information on this website.


When in stock:

This item is available dispatch Monday to Friday, subject to cut-off times and excluding public holidays. Next working day and weekend deliveries available.

Delivery is available to most addresses within the United Kingdom. Some services may not be available to all postcodes. More information is available at the basket and on our delivery page.

We do not dispatch orders to addresses outside of the United Kingdom.

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