The L-12 passive cabinet is the mid sized model of the XT coaxial series and has an operating frequency bandwidth of 55 Hz to 20 kHz. The L-12 enclosure contains a 3'' diaphragm compression driver coaxially loaded by a 12'' low frequency transducer mounted in a bass-reflex tuned enclosure. In passive configuration, the L-12 on board crossover network uses proprietary third order filters The linearization and protection of the transducers is defined by the drive parameters contained in the amplified controllers.