PreSonus Air XD 12 2-Way 1x12 Inch Active Extended Definition Loudspeaker 3-Band EQ This control adjusts the bias

This control adjusts the bias of the transistor

and some are much more equal than others

External charging contacts for docked charging and the Backlit LCD comes with easy to navigate menu and controls

Provide authentic aesthetics with dependable tuning stability and precision

PreSonus Air XD 12 2-Way 1x12 Inch Active Extended Definition Loudspeaker 3-Band EQ This control adjusts the biasThe PreSonus AIR XD 12 is a full range active loudspeaker designed for professional use, delivering extended definition sound, high SPL, and precise tonal balance for any application. Its custom 12 inch low frequency driver features an enlarged 2. 56 inch voice coil for efficient power handling and extended low end response down to 48 Hz, producing tight, dynamic bass with minimal distortion. The 1. 35 inch high frequency driver uses a PEEK diaphragm,