Marantz 5 Channel Power Amplifier - 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.

Sound Enhancements
Software Upgradable No
Lip-sync (digital audio delay) No
AM/FM Tuner No
Bass Redirection No
Satellite Radio Ready No
Auto Calibration by MIC No
Video Up-conversion No
Display Off Blue LED Illumination off mode available
Variable X-over Steel
Source Direct Steel
Source Direct No
Video Off Pure Direct No
Digital Signal Processing No
D/A Conversion No
Power Transformer Large Capacity EI
Discrete Amplification Yes
Current Feedback Topology Yes
HDCD Decoder No
MULTI CHANNEL/SURROUND
SRSNo
DSD(SA-CD)/NEURAL No
Dolby No
DTSNo
THX No
TUNER SECTION AM
Frequency Range No
TUNER SECTION FM
S/N Ratio (Mono/Stereo) No
AUDIO SECTION
Freq. Response (Dig In) No
TUNER SECTION FM
Frequency Range No
AUDIO SECTION
Freq. Response (Analog In) 8Hz-100kHz (+/- 3dB)
S/N Ratio 105dB
Power Output 140W (20Hz-20kHz, 0.08%)
Other
AC Outlets (Switched/Unswitched) No
Headphone Out No
Front Panel A/V Inputs No
Flasher In/IR Receiver In/Emitter out 1/0/0
D-Bus Remote (RC-5) In/Out 1-1
DC Triggers 1 In / 1 Out
External control No
Networking No
Multi-Room Speaker Out No
Multi-Room Video Out No
Multi-Room Audio Out No
Multi-Channel In No
Main Amplifier In Balanced & Unbalanced: 5ch (Exclusive use by a selector switch.)
Pre-Amplifier Out No
Audio
Other No
Video
HDMI In No
Component In No
S-Video In No
Composite In No
HDMI Out No
Component Out No
S-Video Out No
Composite OutNo
Audio
Analog L&R In No
Analog L&R Out No
Digital Optical In No
Digital Coaxial In No
Digital Optical Out No
Digital Coaxial Out No
GENERAL
Weight (lbs) 34.6
Dimensions W x H x D (Inchs) 17-3/8 x 7-3/16 x 15-1/8
Power Consumption 660W (Standby: 0.2W)
Power Requirement No
Remote Control No
Front Panel Aluminum/Glass-reinforced resin
Color Black
Video Section
Signal to NoiseNo
Video Freq. Response (Composit, S-Video) No
Video Freq. Response (Component) No
TUNER SECTION AM
S/N RatioNo