One source, four headphones, four volumes.

The band is tracking a song together, and everyone hears the same mix. Yet the drummer wants it loud and the singer wants it soft. HA400 takes one stereo source, such as the line output of your mixer. It feeds up to four pairs of headphones, each with a level control of its own.

Each listener sets their own level

Plug up to four pairs of headphones into its ¼" TRS outputs and turn each LEVEL control to taste. Each output delivers about 40 mW into 100 Ω. Low-noise 4580 op-amps handle the amplification.

Four listening levels in a 0.37 kg box

At about 47 x 57 x 104 mm and 0.37 kg, it sits beside the mixer without taking much space. Connect the 12 V power supply to the mains and it switches on. An ON LED shows it is running. Everyone plays to the mix level they need.