User Manual for Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier Click to enlarge the picture
Contents of the user manual for the Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier
- Product category: Headphone Amplifiers Mackie
- Brand: Mackie
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Mackie Headphone Amplifiers
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User manual for the Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Mackie product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Mackie user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Mackie product will considerably shorten its lifespan!
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Product description 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. The HM-400 ships with an IEC power cable and occupies 1 RU in a standard 19" rack. - Distribute signal to up to twelve pairs of headphones
- 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
UPC: 663961054071 In the Box Mackie HM-400 Rack-Mountable, 4-Channel Headphone Amplifier Power Cable Limited 1-Year Warranty Table of Contents
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Technical parametersMackie HM-400 Specs | 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 dBu
Aux 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 unbalanced
Aux Input: 10 kOhms unbalanced | | Output Impedance | Headphone Outputs: 3 Ohms unbalanced | | Gain Range | Main Input: -66 to +18 dBu | | Function Controls | Power on/off
Main 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 (
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