Key Features
- Cinematic reference-level home theatre
- 12 channels of power at 200W each for full surround sound impact
- HDAM technology ensures precise, dynamic audio
- Selectable modes adapt to your system needs
- Expertly crafted in Shirakawa, Japan
Marantz AMP 20 Power Amplifier Overview
The Marantz AMP 20 is built for home cinema fans who want powerful, immersive sound with the flexibility to adapt to a wide range of speaker setups. With 12 high-powered channels delivering up to 200 watts each, it's ready to drive full surround systems in larger entertainment spaces, bringing clarity and energy to every corner of the room.
Its custom Class D amplification ensures consistent performance with reduced heat and distortion, while Marantz's HDAM technology adds depth and detail to every scene. Selectable output modes give you the freedom to tailor the amp to your space and system, whether you're bi-amping speakers or powering multiple zones. Built in Japan to exacting standards, the AMP 20 is engineered for serious performance and long-term reliability.
Product Ref: 337620
Full Description
AV Forums Editors Choice – Best AV Power Amplifier 2025/2026
"Marantz has just made life a little easier for those with not quite as deep pockets as customers of the flagship AV 10 and AMP 10. This latest '20' package consisting of both AV processor and power amplifier still sounds marvellous."
Reference-Level 12-Channel Power
At the heart of the AMP 20 is its 12-channel Class D amplification, delivering up to 200 watts per channel. This design allows you to drive a full Dolby Atmos or DTS:X setup with ease, without needing multiple amps. Each channel has enough headroom to handle dynamic movie soundtracks, thunderous explosions and subtle musical textures alike. The result is an even, powerful performance across your entire room, ensuring every listener gets the same high-impact experience, whether front and centre or off to the side.
Custom Class D Amplification
The AMP 20 uses Marantz’s custom Class D amplification modules, engineered for both power and precision. These modules deliver high output without compromising on clarity, letting you enjoy intense soundscapes without distortion. Class D technology is also energy-efficient, so the amplifier runs cooler and is more reliable over long sessions. Whether you're watching a high-action film or listening to a delicate orchestral piece, this amplifier delivers clean, responsive audio that adapts beautifully to your content.
Exclusive HDAM-SA2 Circuitry
Marantz’s HDAM-SA2 technology is key to the AMP 20’s musical character. These discrete amplifier modules replace traditional op-amps to offer better signal accuracy and lower noise. That means more detail in dialogue, richer textures in music and a more lifelike soundstage. This circuitry helps preserve the emotional impact of every scene or song, making the AMP 20 ideal not just for cinema fans but also for those who love listening to music in high fidelity.
Selectable Output Modes
Flexibility is built into the AMP 20 through its selectable output modes. Whether you're using it to drive a full 12-speaker surround system or bi-amping a smaller setup for better performance, you can configure the amp to suit your room and needs. These modes also make it easy to integrate with other components, including the Marantz AV 20, for a fully optimised system. You can grow your setup over time or fine-tune it for specific uses like a dedicated cinema zone or multi-room audio.
Japanese Craftsmanship
The AMP 20 is built in Shirakawa, Japan, where Marantz’s most advanced models are produced. This location is known for precision manufacturing and careful quality control. Each unit is tuned by sound masters to meet Marantz’s exacting standards, ensuring consistent performance across every unit. This focus on craftsmanship means the AMP 20 not only sounds excellent but is also built to last, making it a long-term investment for those serious about their home audio setup.
Perfect Pairing with AV 20
When matched with the Marantz AV 20 processor, the AMP 20 becomes part of a reference-level home theatre system. The two units are designed to work together seamlessly, offering tight synchronisation and audio performance tailored for cinematic experiences. You get a clean signal path, balanced dynamics and support for the latest immersive audio formats. If you’re building or upgrading a dedicated theatre room, this pairing ensures you’re starting from a point of both power and precision.
Features
- 12-channel Class D amplifier delivers up to 200W per channel for high-impact surround sound
- Selectable output modes offer flexible configurations, including bi-amping and multi-zone setups
- Custom HDAM-SA2 circuitry enhances clarity, detail and dynamic range
- Engineered and assembled in Shirakawa, Japan, for premium build quality and precision
- Designed to pair seamlessly with the Marantz AV 20 processor for reference-level performance
- High-efficiency Class D modules minimise heat for cooler, more reliable operation
- Supports the latest immersive formats, including Dolby Atmos and DTS:X speaker layouts
- Robust chassis and internal layout reduce signal interference for cleaner output
- Tailored for large cinema rooms and multi-speaker environments
- Discreet design fits elegantly into AV racks and media furniture setups
What's in the Box?
- Marantz Amp 20
- Quick start guide
- AC cord
- Amp control cable
- Remote control cable
- SP terminal wrench
Specifications
Inputs Outputs
| Main Amplifier in | Balanced & Unbalanced: 12ch (Exclusive use by a selector switch.) |
|---|---|
| Speaker Terminal | SPKT-1+ |
| Number of Speaker Terminals | 12 |
| Bi-Amp Drive /BTL Drive | Yes / Yes |
| Level Meter | Yes |
| Chassis | Copper Plated |
Multi-Room CI
| RS232 Control | Yes |
|---|---|
| IR Flasher In | Yes |
| Marantz Remote Bus | Yes |
| DC Trigger Input/ Output | 1 / 1 |
Specifications
| Number of poweramps | 12 Power Output (8 ohm, 1 kHz, 0.05 2ch Drive) |
|---|---|
| Normal / BTL | 200W / 400W Power Output (4 ohm, 1 kHz, 0.7 2ch Drive) |
| Normal | 400W Power Output (8 ohm, 1 kHz, 0.7 5ch Drive) |
| Normal | 200W |
General
| Front Display | Level Meter |
|---|---|
| Auto Power Off | Yes |
| Metal Front Panel | Yes |
| Power Consumption | 400W Power Consumption, |
| No-Sound | 110W |
| Standby Consumption | 0.2W Maximum |
Product Details
| Dimensions (W × D × H) | 442 × 442 × 191 mm |
|---|---|
| Weight | 18kg |
| Product Code | AMP20/T1B |
| EAN | 4951035908747 |
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