Mackie HM-4 4-Way Headphone Amplifier

4-Channel Headphone Amplifier

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.

Features:

• Distribute a stereo input signal to up to four pairs of headphones
• Ideal for musicians in home and studio recording sessions
• One unbalanced 1/4" TRS stereo input
• Four unbalanced 1/4" TRS stereo headphone outputs
• Dedicated per-output level control allows each person to set a different listening volume
• Front-panel power status indicator
• Heavy-gauge steel chassis for long-lasting durability in the studio or on the road
• Includes 12 VDC power supply

Specifications:

• Number of Channels: 4
• Input Connections: 1x 1/4" TRS stereo (unbalanced)
• Output Connectors: 4x 1/4" TRS stereo (unbalanced)
• Input Impedance: 10 kOhms
• Output Impedance: 47 Ohms
• Maximum Output Level: +22 dB
• Function Controls: 4x 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 (Hx Wx D): 2.0x 4.3x 2.3" / 51x 109x 58 mm
• Weight: 0.5 lb / 0.2 kg