The L-Acoustics SB18M is a high-output 18-inch subwoofer designed to extend system bandwidth with tight, musical low-frequency performance and impressive headroom. Capable of up to 136 dB SPL, it partners effortlessly with premium full-range enclosures to add authority and definition without compromising clarity. The cabinet supports both standard and cardioid configurations, helping sound designers reduce rearward energy on stage while maintaining impactful audience coverage. Built for the road and refined installs, it features a rugged enclosure and integrated handling points for efficient deployment.
With a compact footprint for its class (W 750 x D 540 x H 707 mm) and a 52 kg cabinet weight, the SB18M balances portability with serious low-end impact. Its efficient format streamlines load-ins and optimises truck space, while the consistent voicing across the L-Acoustics ecosystem simplifies design, alignment and tuning.
Ideal for live music, theatre, corporate events and houses of worship, the SB18M delivers controlled, impactful bass that enhances intelligibility and audience engagement across a wide range of professional applications.
Includes
- L-Acoustics SB18M Subwoofer – High-output 18-inch Sub
STAGE4.2.100.500


