The Mackie HM-400 is a compact and user-friendly four-channel headphone amplifier designed as a rack-mounted device. This model features four independent input channels and a total of twelve outputs for user headphones. Using this amplifier, multiple users can control the sound in their headphones without any special effort.
The stereo inputs and outputs in the model are located on TRS 1/4-inch Jack Aux connectors. The amplifier also has a seven-segment LED measurement indicator for each individual channel. The front panel includes a Mute switch (for turning the sound on and off), a switch for switching between mono and stereo modes, two-band equalizer controls (for high and low frequency ranges), independent output level controls, as well as balance controls for mixing the main and auxiliary signals.
The durable metal housing of the amplifier features a rack space (1 unit), making it ideal for fixed installations in places such as temples, recording studios, and practice rooms.
Specifications:
- Device Type: Headphone amplifier
- Output Channels: 4
- Frequency Range for Playback: 20 to 20000 Hz
- Total Harmonic Distortion: less than 0.01%
- Noise Level: -66 dB
- Input Level (max): +15 dBu (on the main input), +20 dBu (on the Aux input)
- Output Level (max): 550 mW per channel at 47 Ohms (headphone outputs)
- Resistance for the main input: 20 kOhms (for balanced connection), 10 kOhms (for unbalanced connection)
- Resistance for the Aux output: 10 kOhms
- Impedance Level: 3 Ohms (for headphone output)
- Gain: ranging from -66 to +18 dBu (for the main input)
- Power Parameters: voltage 220-240V, current frequency 50/60 Hz, power 24W
- Equalizer Parameters: two-band, for adjusting low and high frequencies
- Balance knob: available for each channel
- Indicator: LED, seven-segment
- Housing Finish Material: steel
- Color: black
- Dimensions: 483x224x46 mm
- Weight: 3.6 kg
Package includes:
- Amplifier
- Documentation