L-Acoustics KS21

Powerful dual 21" subwoofer designed for maximum sound pressure, deep range and precise low frequency control. The L-Acoustics KS21 is a modern reference subwoofer designed for large concerts, festivals and demanding corporate productions where strong, solid and at the same time clear bass is required.

Thanks to two 21" long-excursion drivers, the KS21 provides significantly higher headroom than previous generations of subwoofers. The result is a deeper frequency range, higher sound pressure and cleaner reproduction even under extreme loads.

The KS21 is ideal for use with L-Acoustics K1, K2, Kara II, L2 or ARCS systems and is fully optimised for the LA12X amplifiers.

Main advantages

High acoustic performance
Two 21" speakers generate extraordinary pressure suitable for large open-air events and indoor productions.

Precise bass control
Optimized for LA12X amplifiers and control via LA Network Manager with full system monitoring.

Modern touring design
Robust birch plywood construction, durable finish, ergonomic handles and ready for quick installation.

Flexible configuration
Possibility of classic and cardioid connection for effective bass suppression on stage.

Technical information

Type: double 21" bass-reflex subwoofer
Frequency range: approx. 29 Hz – 60/100 Hz (according to presets)
Max SPL: up to 144 dB
Recommended amplifier: LA12X
Weight: approx. 91 kg

Suitable use

Concerts and festivals
Large corporate events
Sports and city events
Touring production
Open-air stage