The AL90 is an augmented array loudspeaker specifically engineered for medium-scale sound reinforcement tasks that require precise horizontal coverage and consistent audio performance. Developed as part of the A-Series by d&b audiotechnik, the AL90 combines advanced acoustic design with flexible deployment options, making it suitable for a variety of installation and mobile sound environments. The AL90 is particularly effective in venues such as theatres, concert halls, houses of worship, and multipurpose event spaces, where speech intelligibility and balanced music reproduction are critical. It can be configured in vertical arrays of up to four modules using the AL Flyingframe, or arranged horizontally using the AL Flying adapter, offering a range of coverage options tailored to the acoustic demands of the space. Designed as a passive two-way loudspeaker, the AL90 houses dual 10-inch neodymium low-frequency drivers and a 1.4-inch exit high-frequency compression driver with a 3-inch diaphragm. These components are integrated with a wave shaping device and a passive crossover to ensure coherent summation across cabinets. The symmetrical layout supports accurate and consistent dispersion, with horizontal directivity control extending to approximately 370 hertz. Built from marine-grade plywood and finished with a durable polyurea coating, the AL90 offers both acoustic performance and long-term resilience. It is a reliable, high-precision loudspeaker solution for professional applications requiring scalable, directional sound reinforcement.