FBT SUBLine 218SA

Dual 18-Inch Powered Subwoofer

The FBT SUBLine 218SA is a dual 18-inch powered subwoofer designed to deliver powerful low-frequency reinforcement for live performances, DJ systems, theaters, clubs, and professional audio installations. Featuring two high-excursion woofers with 3-inch voice coils, a 1200W RMS Class D amplifier, six DSP presets, and a maximum peak SPL of 140dB, this active subwoofer delivers deep bass for demanding sound reinforcement applications.

FBT SUBLine 218SA Competitive Differences

• Dual 18-Inch High-Excursion Woofers: Two 18-inch (460mm) low-frequency drivers with 3-inch (75mm) voice coils deliver powerful bass reproduction for large sound systems.
• 1200W RMS Class D Amplification: Built-in amplifier with switch-mode power supply delivers up to 2400W peak power without requiring an external amplifier.
• 140dB Maximum Peak SPL: Provides high-output low-frequency reinforcement for live concerts, DJ performances, and large venues.
• Advanced DSP Processing: Six presets, three EQ configurations, and two low-pass filter settings allow flexible integration with different full-range speaker systems.
• Deep Bass Extension: Frequency response extends down to 30Hz for low-frequency impact in music and live sound applications.
• System Alignment Controls: Integrated phase switching, delay adjustment, and volume control help optimize subwoofer performance within professional PA systems.
• Tour-Ready Birch Plywood Cabinet: Rugged bass-reflex enclosure with scratch-resistant coating, integrated carrying handles, and M20 speaker pole mounting points.

FBT SUBLine 218SA Description

The FBT SUBLine 218SA is a high-output active subwoofer engineered for professional sound reinforcement systems requiring substantial low-frequency performance. Its dual 18-inch high-excursion woofers feature 3-inch voice coils and operate in a bass-reflex enclosure to produce deep, controlled bass. With maximum peak output reaching 140dB, the SUBLine 218SA provides the low-frequency foundation needed for live bands, touring productions, DJ events, nightclubs, theaters, and houses of worship.

Powering the dual woofers is an integrated 1200W RMS Class D amplifier with a switch-mode power supply and 2400W peak amplifier rating. Built-in amplification simplifies system installation by eliminating the need for separate subwoofer amplification. The subwoofer's omnidirectional dispersion makes it suitable for individual and multiple-subwoofer configurations in portable and installed sound systems.

Integrated digital signal processing provides six selectable presets, three EQ configurations, and two low-pass filter settings for adapting the subwoofer to different speaker combinations and performance requirements. Digital delay adjustment and a 0-180 degree phase switch provide additional system alignment options. Stereo XLR inputs and link outputs, volume control, and LED status indicators allow audio engineers to manage the subwoofer and integrate it with compatible full-range loudspeakers.

The SUBLine 218SA features a durable Baltic birch plywood cabinet with a protective scratch-resistant finish. Its bass-reflex enclosure is designed for demanding live sound applications, while integrated aluminum handles assist with transportation and positioning. M20 threaded mounting points accommodate compatible speaker poles for supporting full-range loudspeakers above the subwoofer. This combination of powerful amplification, flexible DSP processing, and durable construction makes the SUBLine 218SA suitable for mobile DJs, live music productions, clubs, theaters, and permanent PA installations.

SUBLine 218SA Features

• Dual 18-inch active bass-reflex subwoofer for professional sound reinforcement
• Two 18-inch (460mm) high-excursion low-frequency woofers
• 3-inch (75mm) voice coils for powerful bass reproduction
• 1200W RMS Class D power amplifier with switch-mode power supply
• 2400W peak amplifier power
• Maximum 140dB peak SPL for high-output applications
• Deep low-frequency extension down to 30Hz
• Built-in digital signal processing with six selectable presets
• Three EQ configurations for sound system tuning
• Two selectable low-pass filter crossover settings
• Digital delay adjustment for speaker system alignment
• 0-180 degree phase switch
• Stereo XLR inputs and link outputs
• Adjustable volume control and LED status indicators
• Omnidirectional low-frequency dispersion
• Durable Baltic birch plywood bass-reflex enclosure
• Scratch-resistant cabinet coating for professional use
• Integrated aluminum carrying handles for transportation and positioning
• M20 threaded mounting points for compatible speaker poles
• Suitable for live concerts, DJs, clubs, theaters, houses of worship, and installed sound systems

SUBLine 218SA Specifications

• Product Type: Powered Subwoofer
• System Configuration: 1-Way Bass-Reflex
• Low-Frequency Drivers: 2 x 18 in (460mm)
• Voice Coil Diameter: 3 in (75mm)
• Amplifier Type: Class D with Switch-Mode Power Supply
• Amplifier Power: 1200W RMS
• Amplifier Peak Power: 2400W
• Maximum SPL: 140dB Peak (Half-Space)
• Continuous SPL: 136dB (Half-Space, Earlier Specification)
• Frequency Response: 30Hz - 120Hz (-6dB, Earlier Specification)
• Dispersion: Omnidirectional
• DSP Presets: 6
• EQ Configurations: 3
• Low-Pass Filter Settings: 2
• Phase Adjustment: 0-180 Degrees
• Input Impedance: 22kOhms
• Audio Connections: Stereo XLR Inputs and Link Outputs
• Controls: Volume, DSP Presets, Delay, Phase
• Status Indicators: 3 LEDs
• Enclosure Material: Baltic Birch Plywood
• Enclosure Design: Bass-Reflex
• Finish: Scratch-Resistant Black Coating
• Speaker Pole Mounting: M20 Threaded Mounts
• Dimensions (W x H x D): 38.2 x 26.0 x 26.4 in (970 x 660 x 670mm, Approx.)
• Weight: 178.6 lb (81kg, Earlier Specification)

What's In The Box

• FBT SUBLine 218SA Powered Subwoofer
• AC Power Cable

FBT SubLine 218-SA (FBT Sub Line 218 SA)