The Mackie HM-400 is a professional-grade headphone amplifier featuring 12 independent outputs, ideal for studio environments requiring multiple monitoring points. Each output delivers clear, distortion-free audio with individual volume control, ensuring precise sound management for all users. Its robust build and reliable performance make it an essential tool for engineers and musicians seeking consistent, high-quality headphone monitoring

About this item

Professional Monitoring. Total Control.

The Mackie HM-400 is a premium 4-channel headphone amplifier, each channel offering 3 headphone outputs, allowing up to 12 users to monitor simultaneously with individual level controls.

Designed for professional studios, podcast groups, and live recording teams, the HM-400 ensures powerful, balanced sound with flexible input and output routing.

Key Features:

• 4 main channels, each with 3 headphone outputs (12 total)

• Independent volume control per channel

• Main stereo inputs + AUX inputs per channel

• High-quality build with durable metal chassis

• Excellent audio fidelity with minimal noise

• Rack-mountable design for studio integration

What’s in the Box?

• Mackie HM-400 amplifier

• Power cable

• User guide