Welcome
Welcome
Thank you for purchasing the L-Acoustics KS28.
This document contains essential information on using the system properly.
As part of a continuous evolution of techniques and standards, L-Acoustics reserves the right to
change the specications of its products and the content of its document without prior notice.
Please
check
www.l-acoustics.com
on a regular basis to download the latest document and software updates.
KS28 reference subwoofer
The KS28 is a reference subwoofer designed to extend the frequency response of large format systems. The KS28
features two high excursion, 18’’ direct radiating transducers mounted in a bass-reex tuned enclosure. The optimized L-
Vents laminar vented port reduce turbulence and port noise at high levels while also increasing LF efciency.
The KS28 operates from 25 Hz. The excursion capability of the transducer, combined with L-Vents contributes to deliver a
high SPL, with low distortion. The KS28 can offer standard or cardioid directivity, by combining physical deployment and
the suitable preset.
The KS28 is the rst L-Acoustics enclosure to fully utilize the LA12X amplied controller power. The LA12X ensures
advanced crossover functions, linearization and L-Drive protection of the transducers. Its onboard library offers standard
and cardioid presets, each available with two low-pass lters to accommodate various coupling conditions and LF
contour requirements.
The KS28 cabinet is assembled with birch and beech plywood panels. The use of panels optimized for thickness and
combined with stiffeners gives the KS28 maximized internal volume, mechanical integrity and a low weight of 79 kg. It
feature six ergonomic handles for a solid grip and efcient handling. Bottom and side runners ensure safe stacking. A
two-point suspension system is ush-mounted into the cabinet.
The KS28 is the ideal companion to large format systems in stacked or own deployments. KS28 can signicantly boost
the LF extension and contour of line sources.
The KS28 can be stacked horizontally or vertically in standard or cardioid arrangements. With KS28-BUMP, KS28 can
be own in vertical arrays of standard or cardioid arrangements, up to 16 units.
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KS28 user manual (EN) version 3.0