OSD Nero XMAX11

Reference-Grade 11-Channel Home Theater Power Amplifier

AVSForum Top Choice 2026 Award Winner

Designed for uncompromised Dolby Atmos® and DTS:X® home theaters

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Overview

The OSD Nero XMAX11 is a flagship 11-channel Class AB home theater power amplifier engineered for dedicated surround sound systems where power consistency, control, and tonal accuracy matter more than feature count.

This is not an AVR replacement. It is a purpose-built power amplifier designed to deliver honest, sustained output across all 11 channels simultaneously, without current limiting, channel starvation, or thermal compression.

Independently reviewed and awarded AVSForum Top Choice 2026, the XMAX11 has been validated for real-world performance, build quality, and stability in immersive surround systems.

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Power Where It Matters, All Channels Driven

At the heart of the XMAX11 is an oversized 2.3kVA toroidal transformer with extensive energy storage, allowing the amplifier to maintain headroom and control during demanding cinematic peaks.

Continuous RMS Power (All Channels Driven)

Front LCR Channels

• 310W × 3 @ 4 ohms
• 210W × 3 @ 8 ohms

Surround and Height Channels

• 135W × 8 @ 4 ohms
• 85W × 8 @ 8 ohms

This architecture prioritizes higher output for the critical front soundstage while maintaining consistent, clean power across all remaining channels, ideal for modern Atmos and DTS:X layouts.

The result, effortless dynamics, zero compression at reference levels, and precise control of large or inefficient speakers.

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Matched Channels for Immersive Audio

Unlike many multi-channel amplifiers that compromise consistency, the XMAX11 uses identical components, signal paths, and output stages across all 11 channels.

This matched-channel design ensures:

• Uniform timbre across the entire speaker array
• Accurate imaging and dialogue anchoring
• Seamless sound movement in object-based formats

Whether effects are anchored to the center channel or panning across height speakers, the presentation remains cohesive and natural.

Performance Highlights

• Frequency Response: 5Hz to 50kHz
• Signal-to-Noise Ratio: Up to 110dB
• Total Harmonic Distortion: Less than 1% at rated output

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AVSForum Top Choice 2026

The Nero XMAX11 was subjected to extensive evaluation by AVSForum, one of the most trusted authorities in home theater. The review praised the amplifier’s power stability, build quality, and refusal to compromise, despite housing 11 channels in a single chassis.

One amplifier, eleven channels, no shortcuts.

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Integration and Connectivity

The XMAX11 integrates seamlessly with high-end AV processors and pre-pro systems:

• Balanced XLR and unbalanced RCA inputs on every channel
• 12V trigger input and output with auto-on functionality
• Individual front-panel channel status LEDs
• Dimmable blue and yellow VU power meter for real-time output monitoring
• Heavy-duty speaker binding posts

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Construction and Support

Weighing nearly 89 lbs, the XMAX11’s mass reflects its power supply, thermal design, and structural integrity, not cosmetic excess. This amplifier is designed to run cool, remain stable, and perform consistently over long listening sessions.

Dimensions: 7.25" H × 17.1" W × 17.6" D
Warranty: 5-Year Manufacturer Warranty

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Who the XMAX11 Is For

• Dedicated home theater rooms
• Dolby Atmos and DTS:X systems (7.1.4, 9.1.2, and larger)
• Users running separates who want true multi-channel power
• Installers and enthusiasts demanding long-term reliability

Who It’s Not For

• Small rooms or casual surround setups
• Users seeking DSP, room correction, or HDMI switching
• Anyone expecting an AVR replacement

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Flagship of the Nero Amplifier Line

The Nero XMAX11 sits above the HTA4200, HTA5200, and HTA7200 amplifiers, offering substantially greater power capacity and scalability for reference-grade home theater installations. When performance is non-negotiable, the XMAX11 is the definitive choice in the Nero lineup.

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