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Mackie HM 400

Brands: Mackie
Brands
  • Distribute signal to up to twelve pairs of headphones
  • Occupies 1 RU
  • One stereo main input via XLR or 1/4″ jacks
  • One 1/4″ stereo aux input per channel

$360.00

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.

FEATURES

  • Distribute signal to up to twelve pairs of headphones
  • Occupies 1 RU
  • One stereo main input via XLR or 1/4″ jacks
  • One 1/4″ stereo aux input per channel
  • One stereo main output via XLR or 1/4″ jacks
  • Three 1/4″ headphone outputs—one on the front panel and two on the rear—per channel fed by an output level control
  • 2-band EQ per channel for quick treble and bass adjustments
  • Per-channel Balance knob allows control of left/right level balance or aux/main input mix
  • Switches on each channel for L/R mute and St/2-Ch (stereo/mono) mode
  • 7-segment LED metering for input and each output channel
  • Heavy-gauge steel chassis for rugged durability
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Specifications

Brands

Mackie
Product Type

Headphone Amplifiers
Number of Channels 4
Input Connections 2 x XLR 3-pin balanced (one stereo pair)2 x 1/4″ TRS balanced (one stereo pair, also accepts 1/4″ TS unbalanced)

1 x 1/4″ TRS stereo unbalanced for main input

4 x 1/4″ TRS stereo unbalanced for aux inputs
Output Connectors 2 x XLR 3-pin balanced (one stereo pair)2 x 1/4″ TRS balanced (one stereo pair, also accepts 1/4″ TS unbalanced)

12 x 1/4″ TRS stereo unbalanced headphone outputs
Maximum Input Level Main Input: +15 dBuAux Input: +20 dBu
Maximum Output Level Headphone Outputs: 550 mW per channel at 47 Ohms (+21 dBu)
Input Impedance Main Input: 20 kOhms balanced, 10 kOhms unbalancedAux Input: 10 kOhms unbalanced
Output Impedance Headphone Outputs: 3 Ohms unbalanced
Gain Range Main Input: -66 to +18 dBu
Function Controls Power on/offMain level knob

L/R mute switches per channel

Stereo/2-Ch switches per channel

2-band EQ per channel

Balance knob per channel

Output knob per channel
Frequency Response 20 Hz to 20 kHz (±1 dB)
THD <0.01% (+4 dBu, 1 kHz, unity gain)
Noise -66 dB
CMRR Main Input: >42 dB at 1 kHz
Display 1 x input level meter4 x output level meters
Power Requirement 100 to 120 VAC, 50/60 Hz, 24 W220 to 240 VAC, 50/60 Hz, 24 W
Power Connector 1 x 3-pin IEC male, 250 VAC, 10 A
Construction Material Heavy-gauge steel chassis
Dimensions (H x W x D) 1.8 x 19.0 x 8.8″ / 46 x 483 x 224 mm
Weight 8 lb / 3.6 kg

 

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