In terms of sound, the Alien Acoustic Stage Bass can be classified between electric and double bass. It enables a variety of expressive possibilities and expands the sound palette enormously. The unusual design of the cutaway and asymmetrical soundhole also contribute to the uniqueness and warm tone of this instrument. The Alien's ceiling and base are laminated to increase stability. This makes the bass ideal for stage use. Even without amplification, the Alien 's tone is concise, dynamic and expressive, with a growling tone and rich punch across the instrument's entire frequency spectrum. The Alien is equipped with the Fishman Prefix Plus system. With the variable notch filter, a phase reversal switch and controls for bass, treble, brilliance as well as the semi-parametric contour, a wide range of options are available to modulate the sound in a differentiated manner. A 'low battery' indicator provides timely information about a decreasing capacity of the 9-volt power supply.