The ALi90 is a purpose-built version of the AL90 augmented array loudspeaker, specifically developed for fixed installation environments requiring consistent audio performance across medium-scale venues. Combining engineering precision with robust construction, the ALi90 is suited to applications such as theatres, auditoriums, houses of worship, and conference halls where clarity, coverage, and control are essential. It delivers a controlled 90-degree horizontal dispersion, whether deployed vertically using the AL Flyingframe or in a horizontal array with the AL Flying Adapter, supporting up to four modules in either configuration. The ALi90 operates as a passive two-way system, integrating dual 10-inch neodymium low-frequency drivers and a 1.4-inch exit compression driver with a 3-inch diaphragm. These components are combined through a wave shaping device and a passive crossover network to deliver accurate and coherent sound reproduction. Its modular design allows adjacent units to couple without acoustic gaps, with adjustable splay angles from 20 to 40 degrees in 5-degree steps, achieving flexible coverage between 50 and 150 degrees. With a symmetrical driver arrangement, the ALi90 maintains uniform horizontal dispersion down to 370 Hz. Constructed from marine-grade plywood and finished with a durable black coating, the enclosure includes a metal grille and integrated M10 mounting inserts. The ALi90 ensures reliable long-term performance in professional fixed installation settings, offering precise sound distribution and mechanical versatility.