Anthem MDX-12 Multiroom Amplifier

The MDX 12 joins the Anthem MDX family as a simple yet robust solution for powering distributed audio. With 75W of pure Anthem power available on all of its 12 channels, the MDX 12 is ready to bring your home to life with effortless, high-performance sound.

In a market saturated with options, the MDX 12 stands out as the ultimate choice for those who demand both simplicity and excellence. It transforms the task of powering distributed audio systems into a user-friendly experience, ensuring you get not only the best performance but the most enjoyable journey with your music. The MDX 12 is a testament to our commitment to delivering a superior audio experience, making it the perfect companion for those who seek the finest in both form and function.

Pure Anthem Performance in Every Room

The MDX 12 is built to deliver. With 75W x 12 channels at 8 ohms, or up to 150W x 12 channels at 4 ohms, it brings the power—all you need to add is the control. While forgoing the built-in matrix switching of its advanced siblings, the MDX 12 offers a simplified, robust solution. It features six dedicated analog inputs (one for each zone) and two selectable global analog inputs. Simply add the sources or matrix of your choice, and the MDX 12 is ready to deliver true Anthem power to your speakers. Its robust power output also makes it an ideal solution for adding extra channels to a home theater system.

Compact Size, Mighty Output

The MDX 12 occupies just a single 1U rack space, yet it boasts a highly efficient, compact power supply capable of delivering up to 1,000 watts within its sleek chassis. Engineered by Anthem to accommodate various custom speaker setups, this amplifier provides 75W at 8 ohms and 150W at 4 ohms across all 12 channels. For those who need even greater power, the MDX 12 allows for channel bridging, delivering an impressive 280W at 8 ohms. Despite its potent performance, it remains cool under pressure thanks to its fan-cooled design, ensuring uninterrupted power delivery even in the most demanding scenarios.

Compact Design, Massive 1,000W Performance

Distribution amplifiers are often seen as a compromise on design and quality. But at Anthem, we prioritize performance above all else. This commitment is evident in every detail of the MDX 12, a product crafted to deliver exceptional audio quality tailored for custom installations. With an impressive Total Harmonic Distortion of just 0.002% and a high-efficiency power supply capable of delivering up to 1,000 watts, the MDX 12 ensures a blend of superior quality and abundant power. It does all of this while taking up minimal space, making it the ideal choice for your custom installation needs.

Built-in Protections for Reliable Performance

The MDX 12 is built for reliable, relentless performance. It utilizes integrated amplifier chips with built-in safeguards, including protections against out-of-range current, temperature, and voltage. Multiple thermal sensors are strategically placed on the board to monitor fluctuations, ensuring reliable performance and preventing damage to both the amplifier and connected speakers. These protective measures ensure the MDX 12 is suitable for diverse environments, maintaining optimal safety and quality standards while delivering uncompromised sound.

Amplifier Section

• Channels / Zones: 12 channels / up to 6 zones

• Power Output

  • 75 W per channel @ 8 Ω

  • 150 W per channel @ 4 Ω

  • 280 W bridged @ 8 Ω

• Frequency Response: 20 Hz – 20 kHz (±0.4 dB)

• THD: approx. 0.002%

Inputs

• Analog inputs:

  • 6 × RCA stereo pairs (dedicated zone inputs)

  • 2 × RCA bus inputs (shared sources)

• Trigger input:

  • 1 × 3.5 mm (5–24V)

Outputs

• Speaker outputs:

  • 6 × Phoenix connector pairs (12 channels total)

  • Supports wire up to 12 AWG

• Other outputs:

  • 1 × trigger loop

  • 2 × RCA bus outputs

Control & Modes

• Per-zone input selection

• Input gain adjustment per zone

• Bridge mode per zone

• Power modes: Auto / Trigger / Continuous

⚠️ Unlike MDX-8 or MDX-16, MDX-12 does NOT include DSP matrix switching or ARC room correction.

Design & Build

• Rack size: 1U rack-mount

• Cooling: fan-cooled design

• Power supply: up to 1000 W total capability

Physical Specifications

• Dimensions: 4.45 × 43.18 × 42.16 cm (H × W × D)

• Weight: ~7.26 kg