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Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier

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Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier

Key Features
  • XLR & 1/4" Stereo Inputs and Outputs
  • Three Headphone Outputs per Channel
  • Per-Channel 1/4" Stereo Aux Input
  • 2-Band EQ, Balance, and Output Controls
  • L/R Mute Switches
  • Stereo/Mono Mode Switches
  • LED Metering
  • Includes Power Cable

Overview

The Mackie HM-400 is a rack-mountable, 4-channel headphone amplifier designed to provide versatile headphone amplification for artists, musicians, and engineers monitoring through headphones in live stage applications and home, project, commercial, and mobile-recording studios. It features a stereo main output via XLR and 1/4" jacks and twelve 1/4" TRS stereo headphone outputs—three per channel—fed by a customizable blend of inputs.

One stereo main input via XLR and 1/4" jacks can be mixed with a per-channel 1/4" stereo aux input. Each channel offers 2-band EQ for quick tone shaping, stereo balance or main/aux input mix control, and output level adjustments. Also on each channel are switches for muting left and/or right signals and operating in stereo or mono. 7-segment LED meters display main input and per-channel output levels.

Key Specs

Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Power Requirements
AC Input
Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
EQ
2-Band EQ per Channel
Display
5x Multi-Segment LED Meter
Connectivity
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Performance
Frequency Response
20 Hz to 20 kHz ±1 dB
Gain/Trim Range
Inputs:
-66 to +18 dBu
Maximum Input Level
Line Inputs:
+15 dBu
Aux Inputs:
+20 dBu
Maximum Output Level
Headphone Outputs:
+21 dBu
Impedance
Inputs:
20 Kilohms (Balanced)
10 Kilohms (Unbalanced)
Aux Inputs:
10 Kilohms (Unbalanced)
Headphone Outputs:
3 Ohms (Unbalanced)
THD
< 0.01% (at +4 dBu, 1 kHz, Unity Gain)
Noise
-66 dB
CMRR
Line Inputs:
> 42 dB (1 kHz)
Power
Power Requirements
AC Input
AC Input Power
100 to 120 VAC, 50 / 60 Hz
220 to 240 VAC, 50 / 60 Hz
Power Consumption
24 W
Physical
Rackmount Size
1 RU
Dimensions
19 x 8.8 x 1.8" / 483 x 224 x 46 mm
Weight
8.0 lb / 3.6 kg
Packaging Info
Package Weight
9.75 lb
Box Dimensions (LxWxH)
20.8 x 10.6 x 4.1"

What's in the Box:

  • Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier
  • Power Cable
  • Limited 1-Year Manufacturer Warranty
Key Features
  • XLR & 1/4" Stereo Inputs and Outputs
  • Three Headphone Outputs per Channel
  • Per-Channel 1/4" Stereo Aux Input
  • 2-Band EQ, Balance, and Output Controls
  • L/R Mute Switches
  • Stereo/Mono Mode Switches
  • LED Metering
  • Includes Power Cable

Overview

The Mackie HM-400 is a rack-mountable, 4-channel headphone amplifier designed to provide versatile headphone amplification for artists, musicians, and engineers monitoring through headphones in live stage applications and home, project, commercial, and mobile-recording studios. It features a stereo main output via XLR and 1/4" jacks and twelve 1/4" TRS stereo headphone outputs—three per channel—fed by a customizable blend of inputs.

One stereo main input via XLR and 1/4" jacks can be mixed with a per-channel 1/4" stereo aux input. Each channel offers 2-band EQ for quick tone shaping, stereo balance or main/aux input mix control, and output level adjustments. Also on each channel are switches for muting left and/or right signals and operating in stereo or mono. 7-segment LED meters display main input and per-channel output levels.

Key Specs

Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Power Requirements
AC Input
Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
EQ
2-Band EQ per Channel
Display
5x Multi-Segment LED Meter
Connectivity
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Performance
Frequency Response
20 Hz to 20 kHz ±1 dB
Gain/Trim Range
Inputs:
-66 to +18 dBu
Maximum Input Level
Line Inputs:
+15 dBu
Aux Inputs:
+20 dBu
Maximum Output Level
Headphone Outputs:
+21 dBu
Impedance
Inputs:
20 Kilohms (Balanced)
10 Kilohms (Unbalanced)
Aux Inputs:
10 Kilohms (Unbalanced)
Headphone Outputs:
3 Ohms (Unbalanced)
THD
< 0.01% (at +4 dBu, 1 kHz, Unity Gain)
Noise
-66 dB
CMRR
Line Inputs:
> 42 dB (1 kHz)
Power
Power Requirements
AC Input
AC Input Power
100 to 120 VAC, 50 / 60 Hz
220 to 240 VAC, 50 / 60 Hz
Power Consumption
24 W
Physical
Rackmount Size
1 RU
Dimensions
19 x 8.8 x 1.8" / 483 x 224 x 46 mm
Weight
8.0 lb / 3.6 kg
Packaging Info
Package Weight
9.75 lb
Box Dimensions (LxWxH)
20.8 x 10.6 x 4.1"

What's in the Box:

  • Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier
  • Power Cable
  • Limited 1-Year Manufacturer Warranty
$258.41
Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier—
$258.41

Description

Key Features
  • XLR & 1/4" Stereo Inputs and Outputs
  • Three Headphone Outputs per Channel
  • Per-Channel 1/4" Stereo Aux Input
  • 2-Band EQ, Balance, and Output Controls
  • L/R Mute Switches
  • Stereo/Mono Mode Switches
  • LED Metering
  • Includes Power Cable

Overview

The Mackie HM-400 is a rack-mountable, 4-channel headphone amplifier designed to provide versatile headphone amplification for artists, musicians, and engineers monitoring through headphones in live stage applications and home, project, commercial, and mobile-recording studios. It features a stereo main output via XLR and 1/4" jacks and twelve 1/4" TRS stereo headphone outputs—three per channel—fed by a customizable blend of inputs.

One stereo main input via XLR and 1/4" jacks can be mixed with a per-channel 1/4" stereo aux input. Each channel offers 2-band EQ for quick tone shaping, stereo balance or main/aux input mix control, and output level adjustments. Also on each channel are switches for muting left and/or right signals and operating in stereo or mono. 7-segment LED meters display main input and per-channel output levels.

Key Specs

Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Power Requirements
AC Input
Number of Headphone Channels
4-Channel
Headphone Output Power
550 mW per Side into 47 Ohms (Max)
EQ
2-Band EQ per Channel
Display
5x Multi-Segment LED Meter
Connectivity
Analog Audio I/O
2x XLR 3-Pin Balanced Input (1 Stereo Pair)
2x 1/4" TRS Balanced/Unbalanced Input (1 Stereo Pair)
1x 1/4" TRS Unbalanced Stereo Input
4x 1/4" TRS Unbalanced Stereo Aux Input
2x XLR 3-Pin Balanced Output (1 Stereo Pair)
2x 1/4" TRS Balanced Output (1 Stereo Pair)
12x 1/4" TRS Unbalanced Headphone Output
Performance
Frequency Response
20 Hz to 20 kHz ±1 dB
Gain/Trim Range
Inputs:
-66 to +18 dBu
Maximum Input Level
Line Inputs:
+15 dBu
Aux Inputs:
+20 dBu
Maximum Output Level
Headphone Outputs:
+21 dBu
Impedance
Inputs:
20 Kilohms (Balanced)
10 Kilohms (Unbalanced)
Aux Inputs:
10 Kilohms (Unbalanced)
Headphone Outputs:
3 Ohms (Unbalanced)
THD
< 0.01% (at +4 dBu, 1 kHz, Unity Gain)
Noise
-66 dB
CMRR
Line Inputs:
> 42 dB (1 kHz)
Power
Power Requirements
AC Input
AC Input Power
100 to 120 VAC, 50 / 60 Hz
220 to 240 VAC, 50 / 60 Hz
Power Consumption
24 W
Physical
Rackmount Size
1 RU
Dimensions
19 x 8.8 x 1.8" / 483 x 224 x 46 mm
Weight
8.0 lb / 3.6 kg
Packaging Info
Package Weight
9.75 lb
Box Dimensions (LxWxH)
20.8 x 10.6 x 4.1"

What's in the Box:

  • Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier
  • Power Cable
  • Limited 1-Year Manufacturer Warranty
Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier | BHM Store