The L83 + L83S system is a versatile and compact active DSP column system. It is composed of an 8 x 3'' column + 2 Beyma 1'' motors and a fearsome double 12'' subwoofer. The drivers are designed with sophisticated measurements and painstakingly arranged by PhycalTM physical calibration technology to improve vertical acoustic beam coverage. The ETETM waveguide system developed by Audiocenter forms a cylindrical wave, together with a custom horn design to achieve the most even frequency response, which provides precise horizontal coverage and ensures well-balanced, clean and clear sound . The L83S is a compact active DSP controlled subwoofer with 2 Audiocenter designed 12 speakers and a 4000W Class D amplifier module for outsized output. The system works efficiently and has built-in Bluetooth that supports multiple signal inputs. The L83S has several choices of low pass filter, and several presets to tune an L83 column, but also Artist T24L speakers (up to 4 T24L amplified by the L83S).HEAVY PRODUCT