Description
Overview
The Marantz MODEL M4 is an 8-channel, four-zone rack-mount distribution amplifier powered by HEOS, built to deliver high-quality sound across multiple rooms. It’s engineered to handle streaming services, local sources, and TV audio via optical inputs, while offering excellent power and flexibility for multi-room audio setups.
Key Features (with “why it matters”)
-
8 × 100 W (8 Ω) / 8 × 125 W (4 Ω)
Ample clean power to drive speakers even when multiple channels are active. -
Four independent zones with HEOS streaming built-in
Each zone can play different content or be grouped, giving flexibility in multi-room installations. -
Versatile inputs & outputs
Multiple analog, digital, and pre-outs plus subwoofer outputs let you integrate various sources and customize zone outputs. -
Adjustable filters and sound modes
High-pass / low-pass filters, EQ, and sound modes like “Virtual” or “Dialog Enhancer” allow tuning to room acoustics or preferences. -
Bridge Mode
Allows combining channels for higher power output per zone, useful when fewer zones are in use but more headroom is needed. -
Marantz Musical Digital Filtering (MMDF)
Improves digital audio quality, helping preserve detail and reduce artifacts in streamed or networked audio.
Technical Specifications
| Specification | Detail |
|---|---|
| Channels | 8 |
| Power (8 Ω, 20 Hz-20 kHz) | 100 W × 8 |
| Power (4 Ω) | 125 W × 8 (1 kHz) |
| THD (8 Ω) | 0.05% |
| Frequency Response | 20 Hz – 20 kHz, ±1 dB |
| Speaker Impedance Supported | 4 - 16 Ω |
| Analog Inputs | 4 × Stereo RCA |
| Digital Inputs | 2 × Optical (TOSLINK) |
| Preouts / Subwoofer Outs | 4 × Stereo RCA Preouts, 4 × Mono Sub Out |
| Streaming / Music Services | HEOS, Spotify Connect, Tidal, Amazon Music, TuneIn, SiriusXM, etc. |
| Control / Networking | Ethernet ×2, HEOS App (iOS & Android), 12V trigger per zone |
| Bridge Mode Capability | Yes |
| Dimensions (W × H × D) | 415 × 106 × 442 mm |
| Weight | Not published |
| Finish | Black |
What’s in the Box
- Marantz MODEL M4 amplifier unit
- Power cable
- User manual & quick-start guide
- Rack ears / mounting kit
Recommended Use Cases & Compatibility
- Perfect for whole-home audio distribution in 4 zones (rooms) using one device.
- Great for integrators needing flexibility – multiple input types, subwoofer outs, preouts.
- Useful in systems where some zones need high power and others less – Bridge Mode helps adapt.
- Works well with HEOS ecosystem for synchronized/grouped streaming or independent content per zone.
Important Notes / Limitations
- Weight not published – ensure rack or shelf can handle the unit size.
- No wireless inputs beyond streaming – relies on wired digital/analog inputs for local sources.
Common Questions (FAQ)
Q: Can I use this to power speakers in all four zones with full power?
Yes, each of the 8 channels can deliver full power, though bridging channels gives higher power in fewer zones.
Q: What is Bridge Mode?
Bridge Mode lets you combine two channels to act as one, increasing power output per zone where only two channels are needed.
Warranty & Support
- Manufacturer warranty applicable via Marantz / local authorised dealer.
- Support and parts available from Marantz service network.
Trust Factors & Extras
- Manufactured in Shirakawa, Japan – consistent with Marantz’s high build quality.
- Part of the HEOS / Marantz MODEL series designed for integrators.
- Strong digital filtering (MMDF) to preserve detail across streaming and network sources.
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