Marantz MODEL M4 – Multi-Channel Power Amplifier

Description

The Marantz MODEL M4 is a professional-grade 8-channel distribution amplifier built for whole-home audio systems. Designed in Shirakawa, Japan, it delivers 100 W per channel across four independent zones, making it ideal for multi-room setups. Whether you're streaming music or routing TV audio, the built-in HEOS® engine powers seamless wireless playback, while its robust, rack-mount design ensures stable performance in custom installations.

Each of the four zones can be managed separately, allowing independent streaming or grouped playback. The M4 supports high-resolution formats including FLAC, ALAC, WAV (24-bit/192 kHz), and DSD. For TV integration, there are optical digital inputs, and with Dolby Digital decoding, you can easily stream source audio into any zone.

For advanced control, every zone has pre-outs and selectable subwoofer outs with adjustable high-pass and low-pass filters. You also get tone control (bass/treble), balance, and volume limits, making it highly configurable. The amplifier features Marantz Musical Digital Filtering (MMDF) for refined clarity and texture. With 12V trigger outputs per zone and a bridge mode that increases output to 200 W per 4 channels, the MODEL M4 is both powerful and flexible for any multi-room setup.

Key Features:

• 8-channel distribution amplifier with 4 independent audio zones
  
• 100W per channel (8Ω) with low-distortion digital amplification
  
• Bridge mode: 200W output on 4 channels
  
• HEOS® built-in for multi-room wireless streaming
  
• High-resolution audio support: FLAC, ALAC, WAV, DSD
  
• Dolby Digital decoding via optical input
  
• 4 stereo RCA inputs and 2 optical digital inputs
  
• 4 stereo pre-outs and 4 subwoofer outputs (one per zone)
  
• Adjustable high-pass (40–250Hz) and low-pass (40–120Hz) filters
  
• Bass & treble EQ ±5dB and balance ±15dB
  
• Volume limit control for each zone
  
• Sound modes: Stereo, Direct, Virtual, Dialog Enhancer, Night Mode
  
• TV Sound Grouping for syncing TV audio across zones
  
• Marantz Musical Digital Filtering for refined sound quality
  
• 4 × 12V trigger outputs
  
• Rack-mountable design with active cooling
  

Technical Specifications:

• Power Output: 8 × 100W (8Ω), 8 × 125W (4Ω)
  
• Bridge Mode: 4 × 200W (4Ω)
  
• Frequency Response: 20Hz – 40kHz
  
• Speaker Impedance: 4–16Ω
  
• Inputs: 4 × RCA, 2 × Optical
  
• Outputs: 4 × stereo pre-outs, 4 × subwoofer outs
  
• Filters: HPF 40–250Hz, LPF 40–120Hz
  
• EQ: Bass ±5dB, Treble ±5dB, Balance ±15dB
  
• Sound Modes: Stereo, Direct, Virtual, Dialog, Night Mode
  
• Networking: Wi-Fi, Ethernet, HEOS multi-room
  
• Dimensions: 415 × 106 × 442 mm
  
• Weight: 8.0 kg
  
• Warranty: 1 year