L-Acoustics SB18 Subwoofer

L-Acoustics SB18 Subwoofer

The L-Acoustics SB18 Subwoofer is a high-power 18-inch professional subwoofer designed for demanding sound reinforcement applications. Built for professional touring, live events, rental inventories and fixed or temporary sound reinforcement systems, the SB18 combines a high-excursion 18-inch low-frequency transducer with L-Acoustics L-Vents technology to provide powerful and controlled low-frequency performance.

The SB18 is specified with a low-frequency limit of 32 Hz and a maximum SPL of 138 dB under the manufacturer’s stated measurement conditions. It can be deployed in standard or cardioid configurations, allowing system designers to select the appropriate low-frequency radiation pattern for the application. (L-Acoustics sb18)

This makes the L-Acoustics SB18 Subwoofer a practical choice for professional audio companies, touring productions, event rental companies, venues and system integrators looking for a compact but high-output 18-inch subwoofer.

L-Acoustics SB18 Overview

The SB18 is part of the L-Acoustics Subwoofer series and is designed to provide substantial low-frequency reinforcement while maintaining the transportability and rugged construction expected from professional touring equipment.

Each SB18 incorporates a single 18-inch low-frequency transducer. The enclosure uses a dual bass-reflex acoustic load with L-Vents, a technology L-Acoustics developed to reduce turbulence noise and improve output capability. (L-Acoustics sb18)

The SB18 has a nominal impedance of 8 ohms and is designed to be powered by compatible L-Acoustics amplified controllers, including the LA4X, LA8 and LA12X. (L-Acoustics)

Its combination of high output, extended low-frequency response and flexible deployment options makes it suitable for a wide range of professional sound reinforcement systems.

18-Inch High-Power Subwoofer

The defining feature of the L-Acoustics SB18 is its 18-inch low-frequency transducer.

An 18-inch driver provides the displacement required for reproducing the low-frequency energy found in music, live performances and other demanding program material.

The SB18 is designed as a high-power professional subwoofer rather than a consumer-oriented bass enclosure. Its construction, connectors, rigging system and amplifier compatibility are intended for professional production environments.

L-Acoustics specifies the SB18 with a maximum SPL of 138 dB using the manufacturer’s stated SB18_100 preset and measurement conditions. (L-Acoustics)

This high maximum SPL capability allows the SB18 to serve as a serious low-frequency element within professional L-Acoustics systems.

32 Hz Low-Frequency Extension

The L-Acoustics SB18 has a specified low-frequency limit of 32 Hz at -10 dB using the SB18_100 preset. (L-Acoustics)

This extended low-frequency response allows the SB18 to reproduce the fundamental bass energy found in a wide range of musical content.

Low-frequency performance is particularly important in live music, DJ applications, concerts, corporate entertainment and other productions where the audience expects a strong and controlled low-frequency experience.

The actual response and perceived bass performance of any SB18 deployment will depend on the number of enclosures, placement, configuration, amplifier processing, acoustics and operating conditions.

138 dB Maximum SPL

L-Acoustics specifies the SB18 at up to 138 dB maximum SPL under the manufacturer’s stated measurement conditions. (L-Acoustics)

This makes the SB18 suitable for professional applications where substantial low-frequency output is required.

The stated maximum SPL is a manufacturer specification and should not be interpreted as the expected continuous operating level in every application. System configuration, preset selection, amplifier settings, environmental conditions and deployment all influence actual performance.

For professional system design, the current L-Acoustics documentation should always be followed.

L-Vents Technology

The SB18 uses L-Acoustics L-Vents technology as part of its dual bass-reflex acoustic design.

L-Acoustics describes L-Vents as a laminar venting technology designed to reduce turbulence noise and increase output capability. The company states that the technology was introduced with the SB28 and is used across current L-Acoustics loudspeaker enclosures with low-range capacities. (L-Acoustics)

This venting architecture is an important part of the SB18’s acoustic design.

The dual bass-reflex configuration works with the 18-inch transducer to provide the extended low-frequency performance expected from a professional subwoofer.

Standard and Cardioid Configurations

One of the important features of the SB18 is its ability to operate in standard or cardioid configurations.

L-Acoustics specifies the SB18 with standard or cardioid nominal directivity. (L-Acoustics)

A standard configuration provides conventional low-frequency radiation, while cardioid configurations can be used when the system designer needs greater control of rearward low-frequency radiation.

Cardioid subwoofer deployment is particularly useful on stages and in environments where reducing low-frequency energy behind the subwoofer system is desirable.

The exact configuration should be selected according to the system design, number of subwoofers, placement and applicable L-Acoustics presets.

SB18 Cardioid Subwoofer Deployment

The SB18 can be used in cardioid configurations using the appropriate L-Acoustics system configuration and presets.

The L-Acoustics preset library includes dedicated SB18 presets for standard operation as well as cardioid and extended-cardioid configurations. The documented presets include SB18_60_C, SB18_100_C, SB18_60_Cx and SB18_100_Cx. (L-Acoustics)

This gives system engineers multiple options for controlling low-frequency radiation according to the needs of the production.

The correct cardioid arrangement should always be based on the manufacturer’s current documentation rather than an improvised configuration.

SB18 Amplification

The L-Acoustics SB18 is a passive subwoofer and requires an appropriate amplified controller.

L-Acoustics lists the LA4X, LA8 and LA12X as compatible amplified controllers for the SB18. (L-Acoustics)

These amplified controllers provide the power, processing and system management required to operate the SB18 using L-Acoustics presets.

The appropriate amplifier should be selected according to the number of SB18 enclosures, desired configuration and overall system design.

For a complete L-Acoustics system, using the manufacturer’s recommended amplified controllers and presets helps ensure that the loudspeakers are operated within their intended system parameters.

L-Acoustics SB18 and LA12X

The LA12X is one of the amplified controllers listed by L-Acoustics for the SB18. (L-Acoustics)

This makes the SB18 compatible with a range of professional L-Acoustics amplification architectures.

When integrating the SB18 into a larger system, the amplifier configuration should be planned around the complete loudspeaker inventory rather than considering the subwoofer in isolation.

This is especially important when the SB18 is combined with L-Acoustics line source or point source systems.

SB18 Physical Construction

The SB18 is constructed for professional touring and production use.

L-Acoustics specifies the cabinet as being constructed from premium-grade Baltic birch plywood. The front of the enclosure uses a coated steel grille with acoustically neutral 3D fabric. The rigging components use steel with an anti-corrosion coating. (L-Acoustics)

This construction is designed to withstand the demands associated with professional sound production.

The enclosure is also specified with an IP55 rating by L-Acoustics. (L-Acoustics)

As with any professional loudspeaker, the equipment should nevertheless be transported, stored and operated according to the manufacturer’s recommendations.

SB18 Dimensions

The L-Acoustics SB18 measures:

750 mm wide

553 mm high

707 mm deep

L-Acoustics also lists the dimensions as approximately 29.5 inches wide, 21.8 inches high and 27.8 inches deep. (L-Acoustics)

These dimensions make the SB18 a substantial professional subwoofer while remaining compact enough for touring and rental applications.

When planning transportation or storage, customers should account for protective covers, dollies, transport packaging and any additional accessories.

SB18 Weight

Each L-Acoustics SB18 has a manufacturer-specified net weight of 52 kg / 115 lb. (L-Acoustics)

The weight should be considered when planning transportation, loading, stacking and deployment.

The actual shipping weight will be higher when protective packaging, covers, pallets or flight cases are included.

For professional productions, suitable handling procedures should be used whenever SB18 enclosures are moved.

SB18 Connectors

The SB18 includes 2 × 4-point speakON connectors. (L-Acoustics)

These professional loudspeaker connections are designed for integration into professional sound reinforcement systems.

Speaker cables should be selected according to the amplifier configuration, cable length, required conductor capacity and the applicable L-Acoustics system documentation.

SB18 Rigging and Handling

The SB18 includes integrated handling and rigging features.

L-Acoustics specifies four handles, a 4-point captive rigging system and a 35 mm pole socket. (L-Acoustics)

These features provide flexibility for professional deployment and handling.

L-Acoustics also lists accessories such as the M-BUMP bumper, KARA-MINIBU mini bumper, KARA-MINIBUEX extension bars and SB18PLA removable front dolly among the system elements associated with the SB18. (L-Acoustics)

Any flown, stacked or mechanically supported configuration must follow the manufacturer’s approved configuration and applicable safety requirements.

SB18 for Live Sound

The L-Acoustics SB18 is suitable for professional live sound applications where strong low-frequency reinforcement is required.

Concerts, touring productions, festivals and live entertainment events can benefit from dedicated subwoofer reinforcement to reproduce kick drums, bass instruments and other low-frequency program material.

The SB18 can be combined with compatible L-Acoustics loudspeakers to create a complete professional sound reinforcement system.

The exact number of SB18 units required depends on venue size, audience size, desired SPL, coverage requirements and the overall loudspeaker configuration.

SB18 for Rental Companies

The SB18 is also well suited to professional rental inventories.

Its professional construction, integrated handling features, standard and cardioid configuration options and compatibility with L-Acoustics amplified controllers make it a flexible inventory component.

Rental companies can use SB18 units in different system configurations depending on the requirements of individual productions.

For example, the same subwoofer inventory can be configured for conventional deployment on one production and arranged for cardioid operation on another, provided the configuration follows the applicable manufacturer documentation.

SB18 for Touring

Touring productions require loudspeakers that can withstand repeated transportation, setup and operation.

The SB18 is specifically built around a rugged professional enclosure design.

Its Baltic birch plywood cabinet, coated steel grille, integrated handles and captive rigging system are designed for professional production environments. (L-Acoustics)

The 52 kg net weight should still be considered when planning touring logistics and handling procedures.

SB18 for Concerts and Events

The SB18 can provide dedicated low-frequency reinforcement for concerts, corporate events, festivals, outdoor productions and other professional events.

Its 18-inch transducer and 32 Hz low-frequency limit allow it to reproduce substantial bass energy while its 138 dB maximum SPL specification provides significant output capability. (L-Acoustics)

For larger productions, multiple SB18 units can be used as part of a properly designed subwoofer array.

The exact number of cabinets should be determined by the system designer according to the required output, coverage and low-frequency directivity.

SB18 for Corporate Events

Although subwoofers are commonly associated with concerts and entertainment, professional corporate events can also require substantial low-frequency performance.

Awards ceremonies, product launches, gala events and corporate entertainment often include music playback, video content and live performances.

The SB18 can provide the low-frequency reinforcement required for these applications when integrated with a suitable L-Acoustics system.

Its professional appearance and construction also make it suitable for production companies that maintain high standards for equipment quality.

SB18 for DJs

The SB18 is suitable for professional DJ and electronic music applications where low-frequency performance is an important part of the overall sound.

An 18-inch subwoofer provides substantial low-frequency displacement and can help reproduce bass-heavy music with the required impact.

For DJ applications, the number of SB18 units should be selected according to the venue, audience size and desired sound pressure level.

System processing and amplification should always follow the manufacturer’s recommended presets and configuration.

SB18 for Professional Installations

The SB18 is primarily associated with professional sound reinforcement and touring applications, but its technical capabilities can also make it useful in selected professional installation environments.

Where a project requires high-output low-frequency reinforcement, the SB18 can be integrated into an appropriate L-Acoustics system.

Installation projects should consider the physical dimensions, weight, environmental requirements, access and maintenance requirements of the equipment.

For permanent installations, the appropriate L-Acoustics installation documentation should be reviewed.

SB18 System Compatibility

The SB18 is part of the broader L-Acoustics ecosystem.

L-Acoustics lists the SB18 among its professional subwoofer products alongside other models including the SB15m, SB18 IIi, KS21 and KS28. (L-Acoustics)

The SB18 can therefore be selected when a system requires an 18-inch high-power subwoofer rather than a larger dual-driver subwoofer such as the KS28.

The appropriate model depends on the required bandwidth, maximum output, physical size, deployment method and overall system design.

SB18 Presets

L-Acoustics provides dedicated presets for the SB18.

The manufacturer’s preset guide includes standard SB18 presets such as:

* SB18_60
* SB18_100
* SB18_60_C
* SB18_100_C
* SB18_60_Cx
* SB18_100_Cx

The suffixes identify different low-pass filter and cardioid configuration options. (L-Acoustics)

The correct preset should always be selected based on the complete loudspeaker system and intended deployment.

Using an appropriate manufacturer preset is an important part of achieving predictable system performance.

SB18 Low-Frequency Performance

Low-frequency performance is one of the primary reasons professionals choose the SB18.

The 32 Hz low-frequency limit allows the enclosure to reproduce a substantial portion of the low-frequency spectrum found in modern music.

The 18-inch transducer provides the displacement needed for high-output bass reproduction.

The dual bass-reflex enclosure and L-Vents contribute to the acoustic performance of the system. (L-Acoustics)

Actual low-frequency response will vary depending on the number of cabinets, physical placement, coupling, room acoustics and processing.

SB18 Standard Configuration

In standard configuration, the SB18 provides conventional omnidirectional low-frequency coverage.

This configuration can be appropriate when rearward low-frequency radiation does not present a significant issue or when the system design calls for conventional subwoofer deployment.

Multiple SB18 units can be deployed according to the manufacturer’s recommended configurations.

The correct spacing and physical arrangement should be determined using the appropriate L-Acoustics documentation.

SB18 Cardioid Configuration

For productions where rearward bass control is important, SB18 cardioid configurations can provide an alternative approach.

L-Acoustics provides dedicated cardioid presets for the SB18, including SB18_60_C and SB18_100_C. Extended-cardioid presets are also available. (L-Acoustics)

Cardioid deployment can be useful on stages where reducing low-frequency energy behind the subwoofer system is desirable.

The actual rejection pattern depends on the configuration, number of enclosures, physical spacing and processing.

Professional SB18 Subwoofer Package

If you are purchasing multiple L-Acoustics SB18 subs, they can be incorporated into a larger professional system alongside compatible L-Acoustics loudspeakers and amplified controllers.

The SB18 can serve as the low-frequency foundation for a variety of system designs.

When purchasing multiple units, matching the condition and configuration of the enclosures is important for professional rental and touring applications.

Buyers should verify the exact quantity, condition, accessories and amplifier requirements before completing an order.

Condition and Inspection

If purchasing used L-Acoustics SB18 subs, the condition of each enclosure should be checked carefully.

Important inspection points include:

* Cabinet condition
* Front grille condition
* 3D fabric condition
* SpeakON connectors
* Handles
* Rigging components
* Pole socket
* Driver performance
* Internal components
* Cosmetic condition
* Signs of moisture exposure
* Evidence of previous repairs

The condition of used equipment can vary between individual units, so buyers should confirm the condition of the specific inventory being offered.

Additional photographs and operational information can be provided when required.

Why Choose L-Acoustics SB18?

The L-Acoustics SB18 combines several characteristics that make it useful for professional sound reinforcement.

It uses a single 18-inch low-frequency transducer, provides a 32 Hz low-frequency limit, offers a manufacturer-specified maximum SPL of 138 dB and supports standard or cardioid configurations. (L-Acoustics)

Its professional enclosure construction and integrated handling and rigging features also make it appropriate for demanding production environments.

For users already operating L-Acoustics systems, the SB18 can be an effective way to expand low-frequency capability while remaining within the L-Acoustics ecosystem.

L-Acoustics SB18 Subwoofer for Sale

The L-Acoustics SB18 Subwoofer is an excellent option for professional audio companies looking for high-output 18-inch low-frequency reinforcement.

Whether you are expanding a rental inventory, building a touring system or replacing existing subwoofers, the SB18 provides a professional platform with flexible standard and cardioid deployment options.

The enclosure’s 18-inch transducer, dual bass-reflex design and L-Vents provide the foundation for its low-frequency performance. (L-Acoustics)

The SB18 is compatible with L-Acoustics amplified controllers including the LA4X, LA8 and LA12X, allowing it to integrate into professional L-Acoustics systems. (L-Acoustics)

Technical Specifications

L-Acoustics SB18

Product: L-Acoustics SB18

Type: High-power subwoofer

Transducer: 1 × 18-inch LF driver

Low-frequency limit: 32 Hz at -10 dB using the SB18_100 preset

Maximum SPL: 138 dB under the manufacturer’s stated conditions

Nominal impedance: 8 ohms

Acoustic load: Dual bass-reflex with L-Vents

Directivity: Standard or cardioid configurations

Amplified controllers: LA4X, LA8 and LA12X

Connectors: 2 × 4-point speakON

Handles: 4

Rigging: 4-point captive rigging system

Pole socket: 1 × 35 mm

Dimensions: 750 × 553 × 707 mm

Weight: 52 kg / 115 lb

Cabinet: Premium-grade Baltic birch plywood

Front: Coated steel grille with acoustically neutral 3D fabric

Rigging components: Steel with anti-corrosion coating

Protection rating: IP55

Finish: Dark grey brown Pantone 426 C

These specifications are verified against the current L-Acoustics SB18 product information. (L-Acoustics)

Frequently Asked Questions About L-Acoustics SB18

What is the L-Acoustics SB18?

The L-Acoustics SB18 is a high-power 18-inch professional subwoofer designed for low-frequency reinforcement in professional sound systems. (L-Acoustics)

How many drivers does the SB18 have?

Each SB18 contains one 18-inch low-frequency transducer. (L-Acoustics)

What is the frequency range of the SB18?

L-Acoustics specifies the SB18 with a low-frequency limit of 32 Hz at -10 dB using the SB18_100 preset. (L-Acoustics)

What is the maximum SPL of the SB18?

The SB18 is specified at up to 138 dB maximum SPL under the manufacturer’s stated measurement conditions. (L-Acoustics)

Is the SB18 a passive subwoofer?

Yes. The SB18 requires an external compatible L-Acoustics amplified controller. L-Acoustics lists the LA4X, LA8 and LA12X as compatible controllers. (L-Acoustics)

Can the SB18 be used in cardioid configuration?

Yes. L-Acoustics specifies standard and cardioid configurations for the SB18 and provides dedicated cardioid presets. (L-Acoustics)

What amplifier can power the SB18?

L-Acoustics lists the LA4X, LA8 and LA12X amplified controllers for the SB18. (L-Acoustics)

How much does an SB18 weigh?

Each SB18 has a net weight of 52 kg / 115 lb. (L-Acoustics)

What are the dimensions of the SB18?

The SB18 measures 750 mm × 553 mm × 707 mm. (L-Acoustics)

What connectors does the SB18 use?

The SB18 has two 4-point speakON connectors. (L-Acoustics)

Does the SB18 use L-Vents?

Yes. The SB18 uses a dual bass-reflex acoustic load with L-Vents. L-Acoustics describes L-Vents as a laminar venting technology designed to reduce turbulence noise and increase output capability. (L-Acoustics)

Is the SB18 suitable for touring?

Yes. Its professional construction, integrated handles and captive rigging system are designed for professional production environments. (L-Acoustics)

Is the SB18 suitable for concerts?

Yes. The SB18 is designed as a professional high-power subwoofer and can be integrated into appropriate L-Acoustics systems for live sound applications.

Is the SB18 suitable for rental companies?

Yes. Its professional construction and flexible standard or cardioid deployment options make it suitable for professional rental inventories.

Can the SB18 be combined with other L-Acoustics speakers?

Yes. The SB18 is designed to be integrated into L-Acoustics sound reinforcement systems using compatible amplification and manufacturer-specified presets.

Where can I buy L-Acoustics SB18 subs?

Contact Bsound Pro Audio for current availability, quantity, condition, pricing and purchasing information. bsound pro audio

Final Buyer Information

The L-Acoustics SB18 Subwoofer is a professional 18-inch low-frequency enclosure designed for high-output sound reinforcement.

With a manufacturer-specified 32 Hz low-frequency limit, 138 dB maximum SPL, standard or cardioid deployment options and compatibility with L-Acoustics LA4X, LA8 and LA12X amplified controllers, the SB18 can serve as a powerful low-frequency component in professional audio systems. (L-Acoustics)

For rental companies, touring professionals, event production companies and sound system operators, the SB18 provides a flexible solution for adding substantial low-frequency capability to an L-Acoustics system.

Contact Bsound Pro Audio to check current availability, quantity, condition and pricing for L-Acoustics SB18 subs. bsound pro audio