L-Acoustics | SB18 - High power compact subwoofer: 1 x 18''

L-Acoustics | SB18 - High power compact subwoofer: 1 x 18''

The L-Acoustics SB18 is a high-power 18 inch subwoofer that delivers up to 138 dB SPL with extension down to 32 Hz. It combines a high-excursion driver with a dual bass-reflex enclosure and L-Vents for clean, powerful low end, in a rugged cabinet with integral rigging. The SB18 is the natural low-frequency partner for L-Acoustics X Series and Kara systems.

Serious low end, down to 32 Hz

When a 15 inch subwoofer is not enough, the L-Acoustics SB18 adds weight, depth and impact. Its 18 inch high-excursion driver and high power handling deliver maximum output and bandwidth, with usable response down to 32 Hz (-10 dB) and a peak SPL of 138 dB at 1 m. Music with a strong low end, from live bands to DJ sets, gets the foundation it needs.

Clean and controlled with L-Vents

The dual bass-reflex enclosure uses L-Vents, laminar-flow ports with a flared profile. They reduce turbulence and port noise, even at high levels, and increase low-frequency efficiency. The result is bass that stays tight, defined and dynamic, rather than boomy.

Standard or cardioid, stacked or flown

Use the SB18 as a single unit or combine several in ground-stacked or flown arrays. With two or more subwoofers and the matching presets, you can create omnidirectional or cardioid patterns, which reduce low-frequency energy on stage and help you control sound spill. Dedicated rigging accessories and captive hardware make the SB18 easy to combine with other loudspeakers from the same family.

Built for the road

The SB18 is made for demanding use. The cabinet is built from premium-grade Baltic birch plywood, the front is protected by a coated steel grille, and four handles make the 52 kg enclosure easier to move and load. With an IP55 rating and anti-corrosion treated rigging components, it is also suited for outdoor use and frequent transport.

Typical applications

• Live concerts, festivals and touring productions
• Clubs, DJ setups and dance events
• Corporate events and rental systems
• Theaters, venues and outdoor stages
• Fixed installations that need extended low-frequency output

Pair it with

The SB18 is the companion subwoofer for the L-Acoustics X Series and can also be used with Kara systems. It is driven by an L-Acoustics amplified controller such as the LA4X, LA8 or LA12X. For smaller systems that need a lighter subwoofer, take a look at the SB15M.

Want to know more?

Need help choosing the right number of subwoofers or the best array configuration for your venue? Contact us and we'll be happy to advise.

Acoustical

• Low Frequency Limit (-10 dB): 32 Hz
• Maximum SPL: 138 dB
• Nominal Directivity (-6 dB): Standard or cardioid
• Transducers: 1 × 18" cone driver
• Acoustical Load: Dual bass-reflex, L-Vents
• Nominal Impedance: 8 Ω

Physical

• Connectors: 2 × 4-point speakON
• Rigging and Handling: 4 × handles; 4-point captive rigging system; 1 × 35 mm pole socket
• Dimensions (H × W × D): 750 × 553 × 707 mm
• Weight (Net): 52 kg
• Cabinet: Premium-grade Baltic birch plywood
• Front: Coated steel grille, acoustically neutral 3D fabric
• Rigging Components: Steel with anti-corrosion coating
• Finish: Dark grey brown Pantone 426 C
• IP Rating: IP55