L-Acoustics SB28 Subwoofer – Features, Specifications & Price

L-Acoustics SB28 High-Power Subwoofer

L-Acoustics SB28 is a high-power professional subwoofer designed to provide powerful low-frequency reinforcement for demanding sound reinforcement systems. The SB28 features two 18-inch low-frequency transducers in a bass-reflex enclosure and is designed for use with compatible L-Acoustics systems.

The L-Acoustics SB28 is built for professional applications where extended low-frequency performance, high output and reliable system integration are important. It can be used as a subwoofer component in professional concert, touring, festival and large-scale sound reinforcement systems.

With its dual 18-inch configuration and L-Vents technology, the SB28 is designed to deliver strong low-frequency performance while integrating with compatible L-Acoustics loudspeaker systems.

What Is the L-Acoustics SB28?

The L-Acoustics SB28 is a professional high-power subwoofer designed for sound reinforcement applications.

A subwoofer is responsible for reproducing the low-frequency part of an audio system. In a professional sound system, low-frequency performance is important for music, live events and other applications that require powerful and controlled bass.

The SB28 uses two 18-inch low-frequency transducers in a bass-reflex enclosure. Its design is intended to provide extended low-frequency performance and high output for demanding professional applications.

The SB28 is also designed to integrate with compatible L-Acoustics systems. This allows the subwoofer to become part of a larger professional loudspeaker system rather than operating as an isolated component.

L-Acoustics SB28 Features

The L-Acoustics SB28 includes several features designed for professional sound reinforcement.

Dual 18-Inch Low-Frequency Transducers

The SB28 uses two 18-inch low-frequency transducers.

The dual-driver configuration provides the low-frequency output required for demanding professional sound reinforcement applications.

Bass-Reflex Enclosure

The SB28 uses a bass-reflex enclosure designed to support extended low-frequency performance.

The enclosure works with the low-frequency transducers and vent system to provide efficient acoustic performance.

L-Vents Technology

The SB28 introduced L-Acoustics’ laminar venting technology.

The L-Vents design is intended to reduce turbulence and port noise while supporting high output capability.

This technology has also become part of the design approach used in other L-Acoustics low-frequency loudspeaker products.

High Power Handling

The SB28 is designed for high-power professional applications.

Its construction and low-frequency transducers are intended to support demanding sound reinforcement environments where substantial low-frequency output is required.

Professional System Integration

The SB28 is designed to operate as part of compatible L-Acoustics sound systems.

It can be used with appropriate system configurations and presets according to the manufacturer’s recommendations.

L-Acoustics SB28 Specifications

The official SB28 documentation lists the following key specifications.

Specification	L-Acoustics SB28
Product type	High-power subwoofer
Low-frequency transducers	2 × 18-inch
Acoustical load	Bass-reflex
Low-frequency limit	25 Hz
Maximum SPL	142 dB
RMS handling capability	1225 W
Nominal impedance	4 ohms
Dimensions	1300 × 550 × 700 mm
Dimensions in inches	51.2 × 21.7 × 27.6 in
Net weight	93 kg / 205 lb
Connector	1 × 4-point speakON
Cabinet material	Baltic birch plywood
Rigging	Integrated rails for flying and stacking

The exact performance of the SB28 depends on the selected preset and physical system configuration. Always use the manufacturer’s current documentation when designing or deploying an SB28 system.

L-Acoustics SB28 Low-Frequency Performance

Low-frequency reproduction is one of the most important parts of a professional sound reinforcement system.

The SB28 is designed to extend the low-frequency performance of compatible L-Acoustics systems.

The official documentation specifies a low-frequency limit down to 25 Hz for the stated preset configuration.

This extended low-frequency capability makes the SB28 suitable for applications where powerful and deep bass reproduction is important.

Music genres such as electronic music, live concerts, dance events and large entertainment productions can benefit from a properly designed subwoofer system.

L-Acoustics SB28 Maximum SPL

The official product specification lists a maximum SPL of up to 142 dB for the specified SB28 configuration and measurement conditions.

Maximum SPL specifications should always be interpreted in the context of the measurement method, preset and system configuration.

Actual performance in a venue depends on many factors, including acoustic conditions, system configuration, amplifier settings, placement and operating conditions.

For this reason, the SB28 should be configured according to the manufacturer’s recommendations rather than selected on maximum SPL alone.

L-Acoustics SB28 Cabinet Design

The SB28 uses a professional enclosure designed for demanding sound reinforcement environments.

The cabinet is constructed from Baltic birch plywood.

Professional loudspeaker cabinets need to withstand transportation, installation, repeated setup and demanding event environments.

The SB28 also includes integrated rigging rails for appropriate flying and stacking applications.

The enclosure design therefore supports both acoustic performance and professional system deployment.

L-Acoustics SB28 L-Vents

One of the notable technologies associated with the SB28 is L-Vents.

L-Acoustics introduced its laminar venting technology with the SB28.

The progressive vent design is intended to minimize airflow turbulence and reduce unwanted port noise.

This is particularly important in high-output subwoofer applications because turbulent airflow can negatively affect acoustic performance.

The L-Vents approach is now also used across other L-Acoustics loudspeakers with low-frequency capabilities.

L-Acoustics SB28 for Professional Sound Reinforcement

The SB28 is designed for professional sound reinforcement systems.

Professional sound reinforcement requires controlled low-frequency reproduction that integrates correctly with the main loudspeaker system.

A subwoofer should not simply produce as much bass as possible. It needs to work with the main system, crossover settings, physical placement and system processing.

The SB28 is designed to operate within compatible L-Acoustics system configurations.

This allows the subwoofer to be integrated into a complete system using appropriate amplification, processing and presets.

L-Acoustics SB28 for Concerts

Concerts often require substantial low-frequency output.

Kick drums, bass instruments, electronic music and other low-frequency content can require significant acoustic energy.

The SB28 can form part of a professional concert sound system where extended low-frequency reproduction is required.

Its dual 18-inch configuration provides a strong low-frequency foundation for compatible L-Acoustics systems.

The final system configuration should be selected according to the venue, audience size, desired coverage and loudspeaker system being used.

L-Acoustics SB28 for Touring

Touring sound systems require equipment that can withstand repeated transportation and setup.

The SB28 is designed for professional deployment and includes integrated rails that support appropriate flying and stacking configurations.

For touring productions, the subwoofer can form part of a larger L-Acoustics system.

The number of SB28 enclosures required depends on the production requirements and system design.

Professional system engineers should use the manufacturer’s system design tools and documentation when planning a touring configuration.

L-Acoustics SB28 for Festivals

Outdoor festivals can place significant demands on a sound system.

Large audience areas often require high-output low-frequency systems capable of providing consistent bass across the listening area.

The SB28 can form part of a compatible L-Acoustics festival sound system.

Its high-power design and dual 18-inch configuration make it appropriate for professional applications where substantial low-frequency reinforcement is required.

System configuration and subwoofer placement are important factors in achieving consistent coverage.

L-Acoustics SB28 for Large Events

Large events can include concerts, festivals, sporting events, cultural performances and major corporate productions.

These applications may require powerful low-frequency reinforcement.

The SB28 can be integrated into compatible L-Acoustics systems for professional event production.

The appropriate number and configuration of subwoofers should be determined through proper system design.

L-Acoustics SB28 Compatibility

Compatibility is an important consideration when purchasing a professional subwoofer.

The SB28 is designed to operate with compatible L-Acoustics loudspeaker systems and presets.

The official documentation identifies the SB28 as a recommended subwoofer companion for systems including K1, KUDO, V-DOSC and ARCS.

Different system configurations can use different presets and crossover points.

Before purchasing or deploying an SB28, confirm the exact loudspeaker system and recommended configuration.

L-Acoustics SB28 Presets

The SB28 can be operated using appropriate system presets.

Available preset configurations include standard and cardioid applications, with different low-pass filtering options depending on the system configuration.

The current L-Acoustics preset documentation includes SB28 presets such as:

• SB28_60
• SB28_100
• SB28_60_C
• SB28_100_C
• SB28_60_Cx
• SB28_100_Cx

The correct preset depends on the system design and application.

Always use the current manufacturer’s preset documentation rather than selecting a preset based only on the product name.

L-Acoustics SB28 Cardioid Configuration

Subwoofer directivity can be an important consideration in professional sound reinforcement.

A cardioid subwoofer configuration can help control low-frequency radiation toward areas where reduced bass energy is desired.

The SB28 supports appropriate cardioid system configurations using the manufacturer’s recommended presets and physical arrangements.

Correct cardioid performance depends on the number and physical arrangement of the subwoofers, processing and other system parameters.

For this reason, cardioid configurations should be designed using the manufacturer’s system design tools and documentation.

L-Acoustics SB28 System Design

Professional system design involves more than selecting individual loudspeakers.

When designing an SB28 system, consider:

• Main loudspeaker system
• Number of subwoofers
• Subwoofer placement
• Desired low-frequency coverage
• Audience size
• Venue dimensions
• Indoor or outdoor application
• Crossover requirements
• Amplification
• Processing
• Cardioid requirements
• Rigging requirements
• Power distribution

A properly designed system can provide more consistent low-frequency performance than simply adding more subwoofers without considering placement and processing.

L-Acoustics SB28 Amplification

The SB28 requires appropriate amplification and processing.

The manufacturer’s documentation identifies the LA8 amplified controller as the platform used to control and amplify the SB28 in its specified system configurations.

The amplifier and preset must be selected according to the loudspeaker configuration.

Using an inappropriate amplifier, incorrect preset or unsuitable configuration can affect system performance and may damage equipment.

Always follow the manufacturer’s recommended amplification and processing configuration.

L-Acoustics SB28 and LA8

The LA8 amplified controller is an important part of compatible SB28 system configurations.

The LA8 provides amplification and DSP processing designed for L-Acoustics loudspeaker systems.

When the SB28 is used with the appropriate controller and preset, the complete system can be configured according to the manufacturer’s design recommendations.

The exact configuration depends on the number of SB28 enclosures and the other loudspeakers in the system.

L-Acoustics SB28 and Professional Audio Production

Professional audio production requires reliable equipment and predictable system behavior.

The SB28 is designed for professional sound reinforcement environments where high low-frequency output is required.

Its dual 18-inch configuration, bass-reflex enclosure and L-Vents technology make it a professional solution for large-scale low-frequency reinforcement.

However, system design remains essential.

A powerful subwoofer cannot compensate for poor placement, unsuitable crossover settings or an incorrectly configured sound system.

Benefits of the L-Acoustics SB28

Powerful Low-Frequency Reinforcement

The SB28 provides substantial low-frequency output for professional sound reinforcement.

Dual 18-Inch Design

Two 18-inch low-frequency transducers provide a strong foundation for demanding applications.

Extended Low-Frequency Response

The SB28 can provide low-frequency extension down to the range specified by the manufacturer for the applicable preset.

L-Vents Technology

The L-Vents design helps manage airflow through the bass-reflex enclosure.

Professional Construction

The Baltic birch plywood cabinet is designed for demanding professional use.

Flexible Deployment

Integrated rigging rails support appropriate flying and stacking configurations.

System Integration

The SB28 is designed to integrate with compatible L-Acoustics systems and presets.

Who Should Buy the L-Acoustics SB28?

The L-Acoustics SB28 is primarily intended for professional audio users.

Sound Rental Companies

Rental companies can use SB28 subwoofers as part of professional sound system inventories.

Touring Companies

Touring productions can use compatible SB28 systems when substantial low-frequency reinforcement is required.

Concert Production Companies

Concert production companies can integrate the SB28 into compatible L-Acoustics systems.

Festival Production Companies

Outdoor festival systems can use high-output subwoofers to provide low-frequency coverage across large audience areas.

Professional Venues

Venues requiring powerful low-frequency reproduction may use SB28 systems as part of an appropriate L-Acoustics installation or production system.

L-Acoustics SB28 for Rental Companies

For professional rental companies, equipment needs to withstand repeated transport and deployment.

The SB28 is designed for professional applications and includes features intended for system deployment.

Rental companies should maintain accurate records of equipment condition and inspect cabinets, connectors, rigging components and accessories regularly.

When supplying SB28 systems to clients, rental companies should also provide appropriate system configuration information and ensure that the equipment is used according to manufacturer recommendations.

L-Acoustics SB28 Maintenance

Professional subwoofers require proper care.

Regular inspection should include:

• Cabinet condition
• Front grille
• Connectors
• Cables
• Rigging components
• Handles and hardware
• Vent openings
• Signs of moisture or physical damage
• Unusual mechanical noise
• Driver performance

Equipment used outdoors or in demanding touring environments may require more frequent inspection.

Any repair involving internal components or drivers should be performed by a suitably qualified technician.

L-Acoustics SB28 Transportation

The SB28 is a large professional subwoofer.

Its size and weight should be considered when planning transportation, storage and installation.

Use suitable handling equipment and follow safe lifting and transport procedures.

When transporting the SB28, protect the enclosure, connectors, grille and rigging components from unnecessary damage.

Professional rental and touring companies should use suitable transport cases, covers or other protective solutions where appropriate.

L-Acoustics SB28 Rigging

The SB28 includes integrated rails designed for appropriate flying and stacking applications.

Rigging must always be performed according to the manufacturer’s approved procedures.

Professional rigging requires trained personnel and suitable hardware.

Never improvise a rigging configuration or use unapproved hardware.

The safety of personnel and equipment must always be the highest priority when flying professional loudspeakers.

L-Acoustics SB28 for Indoor Applications

Indoor venues can benefit from powerful low-frequency reinforcement.

Concert halls, arenas, entertainment venues and other large spaces may require subwoofers to extend the low-frequency response of the main sound system.

The SB28 can be used in compatible indoor system configurations.

Room acoustics, boundaries and subwoofer placement can significantly affect low-frequency performance.

For best results, the system should be designed for the specific venue.

L-Acoustics SB28 for Outdoor Applications

Outdoor environments present different challenges from indoor venues.

There are fewer natural boundaries, and sound can propagate differently.

A properly designed SB28 system can provide powerful low-frequency reinforcement for outdoor events.

However, outdoor deployment requires careful attention to placement, weather conditions, electrical power, rigging and system coverage.

Always follow appropriate safety and weather-protection procedures.

L-Acoustics SB28 Specifications at a Glance

The key specifications of the SB28 include a dual 18-inch low-frequency design, bass-reflex loading and professional system integration.

The official product documentation specifies:

• Two 18-inch LF transducers
• 25 Hz low-frequency limit for the specified preset
• Up to 142 dB maximum SPL under the stated measurement conditions
• 1225 W RMS handling capability for the specified configuration
• 4-ohm nominal impedance
• 1300 × 550 × 700 mm dimensions
• 93 kg net weight
• Baltic birch plywood cabinet
• 4-point speakON connection
• Integrated rails for flying and stacking

Always verify current specifications before publishing technical figures or using them for system design.

L-Acoustics SB28 Price

The price of an L-Acoustics SB28 can vary depending on availability, market, condition and seller.

New and used professional audio equipment can have significantly different prices.

If you are purchasing multiple SB28 units for a rental company, concert production system or venue, requesting a quotation can be more useful than comparing individual unit prices.

Contact us for current availability and pricing.

Buying an L-Acoustics SB28

Before purchasing an SB28, consider the complete sound system.

First, identify the main loudspeakers that the subwoofer will support.

Next, determine the number of subwoofers required for the venue and application.

Then confirm the appropriate amplification, processing and presets.

If purchasing used equipment, inspect the enclosure, drivers, connectors and rigging hardware carefully.

Also confirm whether the product includes the required accessories.

New vs Used L-Acoustics SB28

A new SB28 may be preferable for customers who require current equipment, warranty support and predictable condition.

A used SB28 can be an option for professional users who want to expand an existing system while controlling costs.

When buying used equipment, check:

• Driver condition
• Cabinet condition
• Connector condition
• Rigging hardware
• Signs of water damage
• Previous repairs
• Included accessories
• Serial information
• Operational history

A professional inspection is recommended before purchasing used loudspeakers for demanding applications.

L-Acoustics SB28 vs Smaller Subwoofers

The SB28 is designed as a high-power subwoofer with two 18-inch drivers.

Smaller subwoofers may be more appropriate when portability, compact dimensions or lower output requirements are more important.

The correct choice depends on the application.

Large concerts and festivals may require a different approach from small corporate events or installations.

Choose the subwoofer based on the complete system requirements rather than size alone.

Why Choose the L-Acoustics SB28?

The L-Acoustics SB28 is designed for professional users who require powerful low-frequency reinforcement.

Its dual 18-inch configuration provides substantial low-frequency capability.

The bass-reflex enclosure and L-Vents technology support its professional acoustic design.

The SB28 can also integrate with compatible L-Acoustics systems through appropriate amplification, processing and presets.

For professional rental companies, touring productions, concert systems and large-scale events, the SB28 can provide an important low-frequency foundation.

Frequently Asked Questions About the L-Acoustics SB28

What is the L-Acoustics SB28?

The L-Acoustics SB28 is a high-power professional subwoofer featuring two 18-inch low-frequency transducers in a bass-reflex enclosure.

How many drivers does the SB28 have?

The SB28 has two 18-inch low-frequency transducers.

What is the frequency range of the SB28?

The official documentation specifies a low-frequency limit of 25 Hz for the applicable preset configuration.

How loud is the L-Acoustics SB28?

The official specification lists a maximum SPL of 142 dB under the stated measurement conditions and preset configuration.

What amplifier is used with the SB28?

The official SB28 documentation identifies the LA8 amplified controller for control and amplification of the SB28 in its specified configurations.

Can the SB28 be used in a cardioid configuration?

Yes. The SB28 supports appropriate cardioid configurations using the manufacturer’s recommended presets and physical arrangements.

Can the SB28 be flown?

The SB28 includes integrated rails for appropriate flying and stacking configurations.

Rigging must always follow the manufacturer’s approved procedures.

Is the SB28 suitable for concerts?

Yes. The SB28 is designed for professional sound reinforcement and can be used as part of compatible concert systems.

Is the SB28 suitable for festivals?

The SB28 can form part of professional festival sound systems where substantial low-frequency reinforcement is required.

How much does the L-Acoustics SB28 cost?

Pricing varies depending on availability, condition and seller. Contact us for current pricing.

Is the SB28 suitable for a rental company?

Yes. The SB28 is designed for professional sound reinforcement and can be an appropriate component of a professional rental inventory.

What is the weight of the SB28?

The official product specification lists the net weight at 93 kg, or approximately 205 lb.

What are the dimensions of the SB28?

The official specification lists dimensions of 1300 × 550 × 700 mm, or approximately 51.2 × 21.7 × 27.6 inches.

What type of cabinet does the SB28 use?

The SB28 uses a Baltic birch plywood cabinet.

What connector does the SB28 use?

The product specification lists one 4-point speakON connector.

What systems can use the SB28?

The official documentation identifies the SB28 as a recommended subwoofer companion for systems including K1, KUDO, V-DOSC and ARCS, subject to the appropriate system configuration.

Conclusion

The L-Acoustics SB28 is a professional high-power subwoofer designed for demanding sound reinforcement applications.

With two 18-inch low-frequency transducers, a bass-reflex enclosure and L-Vents technology, the SB28 is designed to provide powerful and extended low-frequency performance.

It can form part of compatible L-Acoustics systems for concerts, festivals, touring productions, professional venues and large-scale events.

The correct system configuration depends on the main loudspeakers, number of subwoofers, amplification, processing, placement and application.

Before purchasing an SB28, confirm compatibility, technical specifications, condition and system requirements.

If you are looking for an L-Acoustics SB28 for your professional audio system, contact us for current availability, pricing and purchasing information.

Order or Request a Quote for the L-Acoustics SB28

Looking for the L-Acoustics SB28 for your professional sound system?

Contact https://soundprotech.shop/ for current availability and pricing.

Whether you are building a concert system, expanding a rental inventory, preparing a touring rig or upgrading a professional sound reinforcement system, we can help you find the right equipment for your application.

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