Eartec ULPMX4GD UltraPAK Max4G Double HeadsetEartec ULPMX4GD UltraPAK Max4G Double Headset The Max 4G Double features performance that rivals those of other expensive Pro Audio headsets, but at a fraction of the cost. Considered a midweight model the Max 4G Double includes a superior noise canceling microphone and specialty boom arm with internal switch that automatically mutes the mic gain when the arm is placed in the UP position.