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The Marantz MM7055 is a 5-channel Class A/B power amplifier built to deliver clean, high-current power for a premium 5.1 home theater or multichannel music setup. With 140 watts per channel into 8 ohms and Current Feedback discrete amplification, it brings better dynamics, control, and clarity than receiver-only amplification. Flexible connectivity includes balanced XLR and unbalanced RCA inputs for every channel, plus DC trigger integration for seamless system control. A massive EI-core power supply and robust thermal design help it stay stable with demanding speakers for consistently musical, cinematic performance.
Get the Details
Features & Specs
True 5-channel amplification for home theater
Powers all five main channels with consistent performance, making it an ideal match for a dedicated 5.1 surround setup.
Real-world rated power and headroom
Delivers 140 W/ch into 8Ω across the full audio band, with the current capability to keep transients tight and distortion low at higher volumes.
Marantz Current Feedback + discrete outputs
The Current Feedback architecture is built for speed and stability, while discrete amplification supports a more natural, controlled presentation.
Flexible inputs for modern systems
Use XLR for balanced runs and lower noise, or RCA for standard connections—selectable per channel for easy integration in mixed systems.
Heavy-duty power supply for demanding speakers
A large EI-core transformer and over 65,000 µF of energy storage help deliver authoritative bass, cleaner peaks, and better control into tougher loads.
Installer-friendly control connections
DC trigger in/out and RC-5 (D-Bus) make it simple to automate power and integrate with compatible Marantz components and control systems.
True 5-channel amplification for home theater
Powers all five main channels with consistent performance, making it an ideal match for a dedicated 5.1 surround setup.
Real-world rated power and headroom
Delivers 140 W/ch into 8Ω across the full audio band, with the current capability to keep transients tight and distortion low at higher volumes.
Marantz Current Feedback + discrete outputs
The Current Feedback architecture is built for speed and stability, while discrete amplification supports a more natural, controlled presentation.
Flexible inputs for modern systems
Use XLR for balanced runs and lower noise, or RCA for standard connections—selectable per channel for easy integration in mixed systems.
Heavy-duty power supply for demanding speakers
A large EI-core transformer and over 65,000 µF of energy storage help deliver authoritative bass, cleaner peaks, and better control into tougher loads.
Installer-friendly control connections
DC trigger in/out and RC-5 (D-Bus) make it simple to automate power and integrate with compatible Marantz components and control systems.
Expert Insight
The MM7055 delivers clean, confident power that noticeably improves clarity and impact in a 5.1 system. It stays composed at higher volumes, with tight control that helps speakers sound more dynamic and effortless. Balanced and unbalanced inputs plus trigger control make it easy to integrate into both receiver-based and separates-based theaters.
Dylan Crane
Brand Manager
Details
Marantz MM7055 Power Amplifier
The Marantz MM7055 is a high-current 5-channel Class A/B power amplifier built to bring effortless dynamics, clean detail, and signature Marantz musicality to a 5.1 home theater or multichannel music system. Designed with Current Feedback topology and discrete amplification, it delivers stable, authoritative control over real-world speaker loads—so dialog stays clear, effects hit harder, and music keeps its natural tone even when you turn it up. Premium engineering touches like Marantz’s heat-managing “thermal tunnel” output stage and a robust EI-core transformer power supply help the MM7055 stay composed scene after scene and track after track. With both balanced XLR and unbalanced RCA inputs for every channel, plus flexible trigger and remote-control connections, it’s an easy upgrade for AV receivers with pre-outs or dedicated surround processors when you want noticeably better power, headroom, and clarity. The Marantz MM7055 is part of ListenUp's Marantz Amplifiers Collection.
What It's Great At:
Driving a full 5.1 system with consistent, clean power and strong dynamic headroom
Improving clarity and punch versus receiver-only amplification (especially at higher volumes)
Handling tougher speaker loads with high-current design and low-impedance capability
Delivering a refined, detailed sound thanks to Current Feedback and discrete output stages
Flexible system integration with XLR/RCA inputs per channel, plus DC trigger control
Running cool and stable with Marantz’s heat-dissipating thermal tunnel architecture
Marantz MM7055 Full Specifications:
Model: Marantz MM7055
Type: 5-channel power amplifier
Amplifier Class: Class A/B
Number of Channels: 5
Current Feedback Topology: Yes
Discrete Amplification: Yes
Power Transformer: Large capacity EI-core
Energy Storage Capacity: Over 65,000 µF (custom-designed)
Flasher In / IR Receiver In / Emitter Out: 1 / 0 / 0
Detachable Power Cord: Yes (IEC320 2-pin type)
Power Consumption: 660 W
Standby Power Consumption: 0.2 W
Power Requirement (Site Listing): Not specified
Supply Voltage (Sell Sheet): AC 230 V, 50 Hz (may vary by region)
Front Panel Material: Aluminum / glass-reinforced resin
Display: Porthole display with blue illumination accent (illumination off mode available)
Finish/Color: Black
Dimensions (W x H x D): 17-3/8 x 7-3/16 x 15-1/8 in
Maximum External Dimensions: 440 (W) x 183 (H) x 384 (D) mm
Weight: 34.6 lb (15.7 kg)
Warranty: 3-year warranty
THX / DTS / Dolby / DSP / DAC / Networking / Tuner: No (not applicable to a power amplifier)
HDMI / Digital Audio / Video I/O: None
Marantz MM7055 Q&A:
What is the MM7055 best used for?
It’s ideal for powering a 5.1 home theater or multichannel music system, especially when you want more headroom, control, and clarity than a receiver’s internal amps can provide.
Can I use this with my AV receiver?
Yes—if your receiver has preamp outputs (pre-outs), you can connect them to the MM7055 and let it power your speakers while the receiver handles processing.
Does it support balanced XLR connections?
Yes. Each channel includes balanced (XLR) and unbalanced (RCA) inputs, and you can choose the input type per channel.
How much power does it deliver per channel?
It’s rated at 140 W per channel into 8Ω (20 Hz–20 kHz, 0.08% THD) and 170 W per channel into 6Ω.
Will it work with low-impedance speakers?
The MM7055 is designed for high current delivery and low-impedance continuous drive capability, helping it stay stable with more demanding speakers.
Can it turn on automatically with my system?
Yes. It includes 12V DC trigger input/output so it can power on/off in sync with compatible preamps, processors, or receivers.
Does it include speaker terminals suitable for thicker cable?
Yes. It uses gold-plated 4-way binding posts, making it easy to use banana plugs, spades, or heavier gauge wire.
Does it have HDMI or any audio decoding built in?
No. It’s a power amplifier only—you’ll use an AV receiver or surround processor for switching, decoding, and volume control.
The Marantz MM7055 is a 5-channel Class A/B power amplifier built to deliver clean, high-current power for a premium 5.1 home theater or multichannel music setup. With 140 watts per channel into 8 ohms and Current Feedback discrete amplification, it brings better dynamics, control, and clarity than receiver-only amplification. Flexible connectivity includes balanced XLR and unbalanced RCA inputs for every channel, plus DC trigger integration for seamless system control. A massive EI-core power supply and robust thermal design help it stay stable with demanding speakers for consistently musical, cinematic performance.
Get the Details
Features & Specs
Features & Specs
True 5-channel amplification for home theater
Powers all five main channels with consistent performance, making it an ideal match for a dedicated 5.1 surround setup.
Real-world rated power and headroom
Delivers 140 W/ch into 8Ω across the full audio band, with the current capability to keep transients tight and distortion low at higher volumes.
Marantz Current Feedback + discrete outputs
The Current Feedback architecture is built for speed and stability, while discrete amplification supports a more natural, controlled presentation.
Flexible inputs for modern systems
Use XLR for balanced runs and lower noise, or RCA for standard connections—selectable per channel for easy integration in mixed systems.
Heavy-duty power supply for demanding speakers
A large EI-core transformer and over 65,000 µF of energy storage help deliver authoritative bass, cleaner peaks, and better control into tougher loads.
Installer-friendly control connections
DC trigger in/out and RC-5 (D-Bus) make it simple to automate power and integrate with compatible Marantz components and control systems.
True 5-channel amplification for home theater
Powers all five main channels with consistent performance, making it an ideal match for a dedicated 5.1 surround setup.
Real-world rated power and headroom
Delivers 140 W/ch into 8Ω across the full audio band, with the current capability to keep transients tight and distortion low at higher volumes.
Marantz Current Feedback + discrete outputs
The Current Feedback architecture is built for speed and stability, while discrete amplification supports a more natural, controlled presentation.
Flexible inputs for modern systems
Use XLR for balanced runs and lower noise, or RCA for standard connections—selectable per channel for easy integration in mixed systems.
Heavy-duty power supply for demanding speakers
A large EI-core transformer and over 65,000 µF of energy storage help deliver authoritative bass, cleaner peaks, and better control into tougher loads.
Installer-friendly control connections
DC trigger in/out and RC-5 (D-Bus) make it simple to automate power and integrate with compatible Marantz components and control systems.
Expert Insight
Expert Insight
The MM7055 delivers clean, confident power that noticeably improves clarity and impact in a 5.1 system. It stays composed at higher volumes, with tight control that helps speakers sound more dynamic and effortless. Balanced and unbalanced inputs plus trigger control make it easy to integrate into both receiver-based and separates-based theaters.
Dylan Crane
Brand Manager
Details
Details
Marantz MM7055 Power Amplifier
The Marantz MM7055 is a high-current 5-channel Class A/B power amplifier built to bring effortless dynamics, clean detail, and signature Marantz musicality to a 5.1 home theater or multichannel music system. Designed with Current Feedback topology and discrete amplification, it delivers stable, authoritative control over real-world speaker loads—so dialog stays clear, effects hit harder, and music keeps its natural tone even when you turn it up. Premium engineering touches like Marantz’s heat-managing “thermal tunnel” output stage and a robust EI-core transformer power supply help the MM7055 stay composed scene after scene and track after track. With both balanced XLR and unbalanced RCA inputs for every channel, plus flexible trigger and remote-control connections, it’s an easy upgrade for AV receivers with pre-outs or dedicated surround processors when you want noticeably better power, headroom, and clarity. The Marantz MM7055 is part of ListenUp's Marantz Amplifiers Collection.
What It's Great At:
Driving a full 5.1 system with consistent, clean power and strong dynamic headroom
Improving clarity and punch versus receiver-only amplification (especially at higher volumes)
Handling tougher speaker loads with high-current design and low-impedance capability
Delivering a refined, detailed sound thanks to Current Feedback and discrete output stages
Flexible system integration with XLR/RCA inputs per channel, plus DC trigger control
Running cool and stable with Marantz’s heat-dissipating thermal tunnel architecture
Marantz MM7055 Full Specifications:
Model: Marantz MM7055
Type: 5-channel power amplifier
Amplifier Class: Class A/B
Number of Channels: 5
Current Feedback Topology: Yes
Discrete Amplification: Yes
Power Transformer: Large capacity EI-core
Energy Storage Capacity: Over 65,000 µF (custom-designed)
Flasher In / IR Receiver In / Emitter Out: 1 / 0 / 0
Detachable Power Cord: Yes (IEC320 2-pin type)
Power Consumption: 660 W
Standby Power Consumption: 0.2 W
Power Requirement (Site Listing): Not specified
Supply Voltage (Sell Sheet): AC 230 V, 50 Hz (may vary by region)
Front Panel Material: Aluminum / glass-reinforced resin
Display: Porthole display with blue illumination accent (illumination off mode available)
Finish/Color: Black
Dimensions (W x H x D): 17-3/8 x 7-3/16 x 15-1/8 in
Maximum External Dimensions: 440 (W) x 183 (H) x 384 (D) mm
Weight: 34.6 lb (15.7 kg)
Warranty: 3-year warranty
THX / DTS / Dolby / DSP / DAC / Networking / Tuner: No (not applicable to a power amplifier)
HDMI / Digital Audio / Video I/O: None
Marantz MM7055 Q&A:
What is the MM7055 best used for?
It’s ideal for powering a 5.1 home theater or multichannel music system, especially when you want more headroom, control, and clarity than a receiver’s internal amps can provide.
Can I use this with my AV receiver?
Yes—if your receiver has preamp outputs (pre-outs), you can connect them to the MM7055 and let it power your speakers while the receiver handles processing.
Does it support balanced XLR connections?
Yes. Each channel includes balanced (XLR) and unbalanced (RCA) inputs, and you can choose the input type per channel.
How much power does it deliver per channel?
It’s rated at 140 W per channel into 8Ω (20 Hz–20 kHz, 0.08% THD) and 170 W per channel into 6Ω.
Will it work with low-impedance speakers?
The MM7055 is designed for high current delivery and low-impedance continuous drive capability, helping it stay stable with more demanding speakers.
Can it turn on automatically with my system?
Yes. It includes 12V DC trigger input/output so it can power on/off in sync with compatible preamps, processors, or receivers.
Does it include speaker terminals suitable for thicker cable?
Yes. It uses gold-plated 4-way binding posts, making it easy to use banana plugs, spades, or heavier gauge wire.
Does it have HDMI or any audio decoding built in?
No. It’s a power amplifier only—you’ll use an AV receiver or surround processor for switching, decoding, and volume control.
