Alcons Audio Intros QB242 Modular Bass Element
The QB242 is a modular bass element that can be used in both permanent and some portable
applications. It is designed as a fully-scalable low-frequency extension (LFE) system to the
QR24 line-source column system or as an arrayable LFE system with any Alcons pro-ribbon
system.
The QB242 can be stacked or flown in multiples, making it an ideal building block to form
bass arrays for obtaining low-frequency projection and throw control in acoustically
challenging spaces or over longer distances.
The controlled (cylindrical) projection of the QR24 can thus be extended down to the lower
frequencies by enlarging the LFE array length through adding extra QB242 modules. The
lowest usable frequency of one single element is 35Hz.
The Q-systems are an ideal tool in applications where a high directivity and/or a very long
throw is required, combined with hi-fi output and concert sound pressure levels such as theatres, churches,
houses of worship, mobile outdoor sound systems and acoustically challenging rooms.
The two direct-radiating 12” Neodymium woofers are mounted in a vented chamber, with
large bass reflex ports for excellent breathing capacity, increasing overall output while
minimizing port compression. The tight driver arrangement caters to optimal array coupling.
The 8-ohm system impedance makes for very efficient amplifier channel loading when
assembling arrays of multiple units.
The integrated mounting hardware facilitates quick and easy coupling with other QB242
modules; it also offers a slim form-factor, QR24-matching design, a height of 66 centimeters (26″) as well as the
architect color option.
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 the latest VHIR processing, with 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, further reducing distortion, while increasing response accuracy.
Here are all the specs.
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