Mackie HM-4 4-Way Headphone Amplifier

Turn one stereo source into four amply amplified stereo outs with the compact and durable Mackie HM-4 headphone amp. Includes level control for each output.

The ultra-compact Mackie HM-4 4-Way Headphone Amplifier features a 1/4" stereo input and four 1/4" headphone outputs with individual level controls. Perfect for studios or even at home when up to four people want to listen together.


- Share a single stereo source with up to 4 pairs of headphones
- Individual level control for each output
- Powered via the included 12v AC adapter
- Built-Like-A-Tank construction
WARNING: Cancer and Reproductive Harm -

Dimensions and Weight in Packaging
Base Item
Shipping Weight: 0.9 lbs
Shipping Dimensions: 7 x 6 x 3 in
Manufacturer Part Number (MPN): 2049177-00
with Mackie MC100 Headphones
Shipping Weight: 5.03 lbs

For support or warranty questions, please contact the manufacturer:
Phone: 800-898-3211

Reviewers gave this product an overall rating of 5 out of 5 stars. (1 ratings)
Submitted July 3, 2023 by a customer from

"Wonderfully Efficient Headphone Amp with No Frills"

Overall: 5 out of 5 stars
(see rating details)
The Mackie HM-4 is a wonderful headphone amp, perfect for tracking with multiple musicians. I bought one for a session I did with an acoustic guitarist where we were recording live vocals, acoustic guitar, and drum machine. The HM-4 worked perfectly, allowing us each to have our own individual headphone volume. I did not notice any coloration to the material we were monitoring and I hope to have my HM-4 for a very long time maybe forever.
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