Mackie
Mackie HM-400 4-Channel Headphone Amplifier Rackmount
Maximize Your Monitoring Capabilities with the Mackie HM-400 Headphone Amplifier The Mackie HM-400 is a versatile 4-channel headphone amplifier, designed for professional audio environments. With 12 headphone outputs, individual channel controls, and flexible input options, the HM-400 delivers ex...
$199.99*
View on Amazon
✓ In Stock on Amazon.com
*Price sourced from Amazon.com. Last updated:Aug 27, 2026.Price and availability are subject to change — details.
Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.
Notice a mistake? Let Us Know
Overview
Maximize Your Monitoring Capabilities with the Mackie HM-400 Headphone Amplifier
The Mackie HM-400 is a versatile 4-channel headphone amplifier, designed for professional audio environments. With 12 headphone outputs, individual channel controls, and flexible input options, the HM-400 delivers exceptional sound quality and control. Perfect for studios, houses of worship, and practice spaces.
Specifications:
- Channels: 4
- Headphone Outputs: 12 (3 per channel)
- Inputs: L/R Main Stereo Inputs, Aux Input per channel
- Outputs: L/R Main Stereo Outputs
- Controls: Level Control, Balance Control, Mute Switch, Stereo/2-ch Mode Switch per channel
- Mounting: 19” Rackmount
Key Features
L/R main stereo inputs plus L/R stereo outputs
3 headphone outputs per channel
Aux input on each channel with balance control to mix main and aux signal
Mute and stereo/2-ch Mode switches per channel
12 total headphone outputs
Specifications
Brand
Mackie
Model Name
HM-400
Channels
4
Total Headphone Outputs
12
Headphone Outputs Per Channel
3
Main Stereo Inputs
L/R
Main Stereo Outputs
L/R
Aux Input Per Channel
Yes
Aux Input Control
Balance
Channel Switches
Mute, Stereo/2-ch Mode
Frequently Asked Questions
How many individual headphones can be connected to the Mackie HM-400 simultaneously?
The Mackie HM-400 offers a total of 12 headphone outputs, with three outputs available for each of its four channels, supporting a large monitoring setup.
Can I mix an auxiliary signal with the main stereo input for individual channels?
Yes, each channel features an Aux input with a dedicated balance control, allowing you to blend the main and auxiliary signals to create custom mixes for each headphone output.
Are there control options for individual channels?
Each channel on the HM-400 is equipped with Mute and Stereo/2-ch Mode switches, providing specific control over the audio sent to the headphone outputs for that channel.
What type of main inputs and outputs does this amplifier have?
The Mackie HM-400 includes L/R main stereo inputs and L/R stereo outputs, facilitating integration into a standard studio or live sound signal chain.
What kind of applications is the HM-400 best suited for?
With its extensive headphone outputs and channel controls, the HM-400 is well-suited for studio recording sessions, live stage monitoring, and broadcast environments where multiple performers or engineers require individual mixes.
Is this headphone amplifier designed for portable use?
The HM-400 features a rackmount design, indicating it is intended for installation in a standard equipment rack rather than frequent portable transport.
Related Products
