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L-Acoustics Debuts SB28 Subwoofer Enclosure

Oct 10, 2007 2:02 PM

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Designed as the successor to the SB218 subwoofer, L-Acoustics’ new SB28 enclosure brings even more powerful low-frequency impact and improved bass articulation to tours, installations, and corporate productions using Kudo, V-DOSC, dV-DOSC and ARCS system.

The 4ΩSB28 contains two front-loaded, 18in. direct radiating transducers integrated into a bass-reflex tuned enclosure capable of operating down to 25Hz. These specially designed LF transducers provide an exceptional cone excursion capability combined with low thermal compression—even at the very highest operating levels. Furthermore, the enclosure’s bass-reflex vents feature a progressive profile allowing for laminar airflow. The combination of the SB28’s modern components with the new vents delivers an improved +5dB SPL output compared to the previous standards.

Control and amplification of the SB28 is managed by L-Acoustics’ new LA8 amplified controller platform. The LA8’s DSP filtering encompasses advanced crossover functions, system EQ, and L-Drive™ thermal and over-excursion protection of the transducers.

The amplified controller offers a choice of two drive modes for the SB28: standard and cardioid. Each mode features a high-pass filter at 60Hz when using the SB28 as a companion to Kudo, V-DOSC, dV-DOSC, ARCS, and Kiva systems, as well as an additional 100Hz high-pass filter option when used with dV-DOSC or ARCS systems.

Made of Baltic birch plywood, the cabinet also features industry standard aeroquip rails for column rigging, a single 4-pin Neutrik Speakon connector on the rear panel, integral side handles for portability, and a black epoxy perforated steel grille covered with an acoustically transparent ‘Airnet’ cloth.

Measuring 21.7"x51.2"x 27.6" and weighing 205lbs., the new SB28 and its related amplified controller, the LA8, are expected to both begin shipping this month.

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