The Alcons Audio QB242 is a modular column bass system intended for use in both permanent and (limited) portable applications. It is designed primarily as a low-frequency extension (LFE) parter to the QR24 line-source column system but it can be used as arrayable LFE system with any Alcons system.

Alcons Audio QB242 The QB242 can be stacked or flown in multiples to form bass arrays, for obtaining low-frequency projection and throw control in acoustically challenging spaces. The controlled (cylindrical) projection of the QR24 can be extended down to the lower frequencies by enlarging the LFE array length through adding extra QB242 modules.

The direct-radiating 12-inch Neodymium woofers are mounted in a vented chamber, with large bass reflex ports, increasing overall output while minimising port-compression. The 8Ω system impedance ensures efficient amplifier channel loading when assembling arrays of multiple units. The double baffle board and the combination of complex internal panel layout with the reflex-ports brings a rigid structure with a high enclosure stiffness from a weight-efficient package.

Integrated mounting hardware facilitates easy coupling with other QB242 or QR24/QM24 modules, while the cabinet’s shallow form-factor, QR24-matching height and design and Architect Color Option provide extensive integration options.

The QB242 is powered and controlled by the ALC amplified loudspeaker controller. Through the integrated processing and feedback, the ALC offers QB242-specific drive processing with optimal response and long-term reliability. The integrated factory presets in the ALC drive processor offer gain, phase and filtering matching with all Alcons top systems.

Through the Signal Integrity Sensing (SIS) pre-wiring, the cable length and connector resistance between the QB242 and ALC is dynamically compensated (system damping factor 10.000), further reducing distortion, while optimising response accuracy.

Typical applications for the Q-systems include main theatre system PA, acoustically challenging room systems, and use as mobile long-throw sound system.


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