Mackie HM-4 Features :
 
Desktop-friendly 4-channel headphone amplifier
Splits a single stereo signal into four headphone outputs
Expands your audio interface's headphone output and adds solid cue mix distribution to your rig
Each output features its own level control
Premium analog circuitry ensures super-high headroom and a low noise floor
Heavy-gauge steel chassis and long-wear potentiometers provide extreme durability
Power supply is included
 
Tech Specs
 
Type:Headphone Amp
Input Channels:Single Stereo channel
Output Channels:4
Analog Inputs:1 x 1/4" TRS (stereo)
Headphones:4 x 1/4" TRS
Controls per Channel:Volume
Form Factor:Desktop
Power Supply:12V DC power supply (included)