Two 12" neodymium (3-inch voice coil), high Bl (force factor) low-frequency drivers are loaded by two proprietary hybrid horns. The horn mouths are horizontally separated by a "tuned" distance using the Tuned Dipolar Array effect achieve exceptional low-frequency horizontal dispersion control with nominal angle being maintained up to 280 Hz. In a live situation, the optimal directional low-frequency control provided by this technology will prevent LF signals from the sound reinforcement re-enter the live stage leaving it much �cleaner�.Two 12" neodymium (3-inch voice coil), high Bl (force factor) low-frequency drivers are loaded by two hybrid horns patented. The horns are separated horizontally by a "tuned" distance that uses the Tuned Dipolar Array effect to achieve exceptional low-frequency horizontal dispersion control with nominal angle maintained up to 280 Hz. In a live situation, the Optimum directional control of low frequencies provided by this technology will prevent LF signals from the sound reinforcement system from re-entering the live stage leaving much "cleaner"..PZA MORE SPECS