Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint
Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint
Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint
Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint
Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint
Mackie HM-400 4-Channel Headphone Amplifier - Counterpoint

Mackie HM-400 4-Channel Headphone Amplifier

  • SKU: W-REB054B
Price Match
Mackie HM-400 4-Channel Headphone Amplifier.

Versatile, accurate monitoring. The Mackie HM 400 will be a welcomed addition to your professional recording set-up, particularly excelling in live and studio scenarios.

Monitor with ease and precision through the HM400’s independent level controls, onboard two-band EQ, stereo/dual mono selection and 7-segment LED meters. This enables you to create unique headphone mixes, catering for everyone’s desires to enhance performance and recordings. The compact, nature of the HM400 makes it ideal for installed applications within performance venues, houses of worship, recording studios and even practice spaces.

Encased in a solid steel chassis, Mackie’s Built-Like-A-Tank™ construction guarantees long-lasting, high-quality performances to cope with the portable life of the touring musician and recording engineer, making the HM-400 a steal for its price.

Key Features

  • Four-channel design with three headphone outputs per channel
  • 1U 19-inch chassis for installed applications
  • Accurate monitoring with 7-segment LED meters
  • L/R main stereo inputs and outputs, plus ¼-inch AUX jacks
  • Independent balance, bass, treble and level controls

Tailored mixes

The Mackie HM-400 offers four independent input channels and a total of 12 headphone outputs, making it the perfect addition for any professional musician or recording engineer wishing to expand their current set-up.

Whether you're on stage or in the studio, solid headphone mixes are a necessity for inspiring musicians to achieve powerful performances. The flexibility and versatility of the Mackie HM-400 ensure that the performer has total control over their sound. Users will be able to apply an extremely musical two-band EQ to their headphone mix, giving them the ability to cut or boost bass and treble frequencies to taste.

Each channel can be set to one of two modes: stereo or two-channel. The stereo setting ensures that the width and depth of the mix are maintained across all headphones, whilst the two-channel option sums the signal to dual mono, allowing you to check phase coherency and ensuring consistent sound across all headphone types.

High fidelity playback

High-quality analogue circuitry promises detailed playback, designed to provide the listener with sparkling highs and warm lows, alongside clear 7-level LED meters, allowing you to monitor audio accurately, eliminating the possibility of clipping and distortion.

Built to last

Mackie takes pride in the build quality of their equipment, providing Built-Like-A-Tank™ construction and the HM-400 is no exception. The amplifier features a robust, solid steel chassis, designed to cope with the day to day hardships of the working professional. The construction philosophy is also reflected in the use of long wear potentiometers and switches, providing you with years of trouble-free use and high-quality performance.

The HM-400's 19" 1U rack-mountable chassis enables the amplifier to be mounted in both studio and location rigs, making it the ideal choice for live shows, sessions, podcasts as well as studio recordings.


  • 12 total headphone outputs
  • L/R Main stereo inputs plus L/R stereo outputs
  • 7 segment LED metering per channel plus main
  • 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
  • Renowned Mackie Built-Like-A-Tank™ construction
  • Frequency Response: 20hz-20khz.
  • Noise: -66dB
  • Distortion: (THD) +4 DBU, 1kHz, unity gain < 0.01
  • Maximum levels: Main Input: +15dBu balanced / unbalanced. Aux Input: +20-dBu unbalanced. Headphone: 550mW / Channel @ 47 Ω (+21dBu)
  • CMRR (Main Input): > 42dB @ 1Khz
  • Gain Range: (Main Input -66 to 18dBu
  • Input Type: Female XLR Balanced. Female 1/4" balanced - unbalanced
  • Main Input Impedance: 20 KΩ balanced, 10 kΩ unbalanced.
  • Aux Input Impedance: 10 KΩ unbalanced.
  • Output Type: Male XLR Balanced. Female 1/4" Balanced - Unbalanced
  • Headphone Output Impedance: 3 Ω unbalanced.
  • Detachable Line Cord: 100 - 120V, 50/60Hz, 24W, 220 -240V, 50/60Hz, 24W
  • AC Connector: 3-pin IEC 250 VAC, 10 A male
  • Weight: 3.6Kg / 8.0lb



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100-day returns

We want you to feel reassured that the products you buy from us are built to last for the classroom, in the office or on the road. That’s why we have a 100-day guarantee where you can return the product if anything you buy from us develops a fault within 100-days.
Different rules apply to our Built-to-order products, read more on our Terms and Conditions.
Our products are hand-selected and built to last.


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