Searching for an easy way to increase the monitoring capacity of your studio? Look no further than the Mackie HM-400. This 4-channel headphone amplifier boasts three outputs per channel for a total of 12 headphone outputs. Each channel contains an aux input, along with a balance control to mix your main and aux signals. Four independent aux inputs supply up to eight individual stereo mixes. You also get Stereo/2-channel Mode switches along with 7-segment LED meters on each channel. Premium analog circuitry ensures super-high headroom and a low noise floor, while a heavy-gauge steel chassis and long-wear potentiometers and switches provide extreme durability. The HM-400 delivers high-performance headphone amplification that's sure to become an invaluable asset in your studio.