Marantz MM8077 7-Channel Power Amplifier

Description

Enjoy powerful multi-channel sound with the MM8077 7-Channel Power Amplifier from Marantz. This amplifier features a discrete amplification design for robust sonic delivery. Each channel in the amplifier delivers up to 150W of power at 8 ohms and 180W at 6 ohms. It's even equipped with balanced and unbalanced input options, allowing you to connect a wide variety of pre-amplifiers and processors. Furthermore, this amplifier is capable of efficiently driving stereo, 5-channel, and 7-channel home entertainment systems, as well as being a component in larger 11-channel systems.

Current Feedback Discrete Power Amplifier

This model is equipped with a current feedback amplifier section that uses the same push-pull circuit found in Marantz's SM-11S1 Hi-Fi power amplifier. This amp is designed to provide increased operating stability, high-speed, and wide ranging high-density playback. The current/voltage conversion amplification section in the latter part of the power amp is equipped with a Wilson current mirror circuit that amplifies to the high sound range with low distortion.

Large Toroidal Power Transformer

The high power, high current power supply features a massive toroidal power transformer that can handle substantial short term power peaks. The high capacity power supply capacitors, 100,000µ total, contribute to the amplifier's ability to deliver short term bursts of power when needed, which is helpful when driving difficult-to-drive lower impedance speakers.

High-Quality Design

This amplifier is equipped with a chimney-shaped heat sink to efficiently process the heat emitted from each channel along with quiet cooling fans. A high-sensitivity temperature sensor IC is used to control the cooling fans, adjusting the rotation speed to match the amount of heat generated by the amp.

Balanced and Unbalanced Inputs

For installation flexibility and maximum compatibility, each channel on this amplifier is equipped with balanced and unbalanced inputs.

Custom Installation-Ready

This amplifier has an IR flash input that supports custom installations and DC trigger input and output terminals.

Remote Power Control

When the Marantz AV8801 or AV7701 pre-amplifier is connected to the MM8077, the remote power control feature links the power on/off function of the pre-amplifier to the MM8077.

Low-Power Standby Mode

For environmental and energy-saving considerations, power consumption during standby mode has been reduced to less than 0.4 W

Auto-Standby Mode

The MM8077 automatically switches to standby mode when there has been no signal for 30 minutes. This prevents power from being wasted whenever you forget to turn the power off.

Additional Features

The Marantz MM7055 incorporates several premium features that enhance both performance and aesthetic appeal. One of its signature design elements is the iconic porthole display with blue illumination, which not only adds a distinctive Marantz touch but also provides key operational information at a glance.

For superior signal transfer and long-term durability, the MM7055 is equipped with gold-plated, high-grade loudspeaker terminals. These terminals ensure a tight, corrosion-resistant connection with speaker cables, contributing to the amplifier's reliable and consistent performance.

Under the hood, the MM7055 is built for demanding audio playback, thanks to its low impedance continuous drive capability, which allows it to maintain stable output even with challenging speaker loads. It also features Marantz reference-grade power supply filter capacitors and high-current discrete power transistors, ensuring clean, dynamic power delivery with minimal distortion. Although the unit does not include a copper-plated chassis in this model, the overall build quality and internal components still reflect Marantz’s high standards for audio excellence.

Specifications