Description
- The Mackie HM-4 is a compact 4-channel headphone amplifier designed to split a single stereo source into up to four independent headphone feeds with clean, reliable signal distribution. Built with Mackie’s rugged “Built-Like-A-Tank™” steel chassis, it delivers durability for studio, rehearsal, and mobile setups while remaining simple and space-efficient. Each output features its own dedicated volume control, allowing every listener to set a comfortable monitoring level without affecting others. With one 1/4″ TRS stereo input and four 1/4″ TRS headphone outputs, it’s ideal for recording sessions, podcasting, practice spaces, and any situation requiring straightforward multi-user headphone monitoring with consistent audio quality.

Individual Level Control
Each output has its own dedicated level knob, allowing every listener to adjust their own headphone volume without affecting others.

Rugged Steel Build
Built with a heavy-duty steel chassis using “Built-Like-A-Tank™” construction, ensuring durability for studio and mobile use.

Simple Connectivity
1 x 1/4" TRS stereo input with 4 x 1/4" TRS headphone outputs for quick, plug-and-play signal distribution.

4-Channel Output
Splits a single stereo source into up to four separate headphone outputs, making it easy to run group monitoring in studios, rehearsals, or podcast setups.
- Distribute a stereo input signal to up to four pairs of headphones
- Ideal for musicians in home and studio recording sessions
- One unbalanced 1/4″ TRS stereo input
- Four unbalanced 1/4″ TRS stereo headphone outputs
- Dedicated per-output level control allows each person to set a different listening volume
- Front-panel power-status indicator
- Heavy-gauge steel chassis for long-lasting durability in the studio or on the road
- Includes 12 VDC power supply
Form Factor: Tabletop
Number of Headphone Channels: 4-Channel
Analog Audio I/O:
4x 1/4″ TRS Unbalanced Headphone Output
1x 1/4″ TRS Unbalanced Stereo Input
Maximum Output Level: +22 dB
Impedance:
Inputs: 10 Kilohms
Outputs: 47 Ohms
Power Requirements: AC/DC Power Adapter (Included)
AC/DC Power Adapter: 12 VDC
Dimensions: 4.3 x 2.3 x 2″ / 5.8 x 5.1 x 5.1 cm
Weight: 0.5 lb / 0.2 kg












