Mackie HM-4 4-Way Headphones Amplifier

This super-compact headphone amp is perfect for home studios, mobile recording, and even initimate "headphone" rehearsals. Each of the four outputs has a dedicated volume control. Input is 1/4" stereo, and each of the four headphone outputs is 1/4".

Features

• Built-Like-A-Tank™ construction
• Share a single stereo source with up to 4 pairs of headphones
• Individual level control for each output
• Powered via the included 12V AC adapter

Specifications

• Maximum Level (1/4" input): +22 dB
• Input/Output:
  • Input Type: Female 1/4" phono, unbalanced stereo
  • Input Impedance: 10 kΩ each channel, unbalanced
  • Output Type: 4 x Female 1/4" phono, unbalanced, stereo
  • Output Impedance: 47 Ω each channel, unbalanced
  • Level Control: 4 x Rotating phones knobs
• Power Requirement: +12V DC
  • Current Draw: < 220 mA, maximum
• Display LEDs: Top power on/off
• Dimensions (H x W x D): 2.0" x 4.3" x 2.3"
• Weight: 0.5 lbs.