The Mackie HM-4 is a 4-way headphone amplifier designed to provide simple and effective headphone amplification for artists, musicians, and engineers monitoring through headphones in home, project, commercial, and mobile-recording studios. Its single 1/4" TRS stereo input and four 1/4" TRS stereo outputs allow you to distribute a stereo source to up to four pairs of headphones.
Each output is controlled via a dedicated level knob, allowing varied listening volumes for each person. The compact heavy-gauge steel chassis offers rugged durability and a convenient power status indicator on its front panel. Use the included 12 VDC power supply to power the HM-4.
Number of Channels 4
Input Connections 1 x 1/4" TRS stereo (unbalanced)
Output Connectors 4 x 1/4" TRS stereo (unbalanced)
Input Impedance 10 kOhms
Output Impedance 47 Ohms
Maximum Output Level +22 dB
Function Controls 4 x volume controls
Frequency Response Not specified by manufacturer
Power Requirement 12 VDC power supply
Current Draw <220 mA maximum
Construction Material Heavy-gauge steel chassis
Dimensions (H x W x D) 2.0 x 4.3 x 2.3" / 51 x 109 x 58 mm
Weight 0.5 lb / 0.2 kg
Packaging Info
Package Weight 1.0 lb
Box Dimensions (LxWxH) 6.9 x 5.8 x 2.9"