Name: SLA2218SP - Two 18" Bass-reflex Active Subwoofer
Brand: Beta Three
SKU: SLA2218SP
Availability: InStock
Rating: 5.0 (100 reviews)

Two 18" Bass-reflex Active Subwoofer

The SLA2218SP is a high-performance, bass-reflex dual 18" 1000W (RMS) active subwoofer featuring integrated DSP. It serves as the ideal flyable low-frequency complement to the SLA212P line array system.

Premium Power & Acoustic Design

High-Efficiency Amplification: Driven by a Class-D amplifier module precisely matched to high-quality woofers, the system delivers a peak power output of up to 4000W.
Robust Enclosure: Built from 18mm thick multi-laminate plywood, the enclosure features a compact acoustic design that balances a refined aesthetic with exceptional structural integrity, achieving a tensile strength of up to 4500N.
Optimized Porting: The bass-reflex design utilizes an optimized inverted port tube to minimize air turbulence and wind noise at high output levels, reducing low-frequency distortion and maximizing clarity.

Weather-Resistant Construction

Durable Grille: The integrated steel grille is engineered from high-strength Q235 steel and finished with a protective powder coating. It offers excellent environmental resistance, passing rigorous 96-hour salt spray testing (5% $NaCl$ solution).
Waterproofing: The exterior of the steel grille features a tightly woven acoustically transparent cloth backing, providing effective water protection without compromising acoustic performance.

Streamlined Rigging & Integration

Single-User Deployment: Specially engineered metal connectors and dedicated suspension brackets enable seamless alignment and attachment to SLA212P line array modules.
Convenient Rigging: Quick-connect components allow for rapid assembly, disassembly, and precise angle adjustments, making single-person setup straightforward and efficient.

The SLA2218SP + SLA212P combined line array system is engineered to provide comprehensive, high-fidelity sound reinforcement for both speech and live music across a wide variety of demanding venues.

Applications

Large-scale gymnasiums and sports complexes
Professional theaters and auditoriums
Indoor and outdoor arenas
Live performance and touring venues

Features

Acoustic Design: Premium bass-reflex configuration utilizing dual 18" high-excursion woofers.
Power Capability: 1000W RMS power handling with a massive 4000W peak power capacity.
Output & Range: Achieves a maximum SPL of 131 dB with a smooth low-frequency response spanning 35 Hz to 200 Hz.
Premium Enclosure: Constructed from durable 18mm plywood and outfitted with a heavy-duty steel front grille with a protective cloth backing.
Sound Profile: Engineered to deliver a clear, powerful, and rich low-frequency acoustic performance.
High-Performance DSP: Integrated 1-in / 2-out digital signal processor featuring a DSP-controlled input section with quickly selectable presets.
Preset Management: Supports 16 recallable scene modes, including 8 optimized factory presets. Features seamless parameter saving/retrieval for cloning settings between units or back and forth with a PC.
Network Connectivity: Includes a dedicated network port for remote power amplifier debugging, monitoring, and real-time control.
Visual Interface: Built-in 1.8-inch TFT color display provides comprehensive real-time status monitoring, including:
Output voltage & current
Operating temperature
Protection status & faults
Load status (overload, open circuit)
Output signal levels
Comprehensive Protection Suite: Robust hardware and software safeguarding against overheating, voltage clipping, overload, and output DC faults.
System Versatility: Optimized to perfectly pair 1× SLA2218SP subwoofer with 4× SLA212P line array modules, creating a highly cohesive, natural, and detailed sound reinforcement package.

Specifications

Acoustical specifications

Frequency Response(-10db):

35Hz-200Hz

Max SPL @ 1m:

125dB/131dB(PEAK)

Transducers

Woofer:

2 x 18" LF

Input/Output section

Input signal:

≥20kQ(Balance),10kΩ(Unbalance)

Input Connectors:

1 x XLR

Power section

Total Power:

1000W(RMS);

Nominal Impedance (Ohm):

8Ω

Voltage range:

AC 100V/240V, 50Hz/60Hz

Physical specifications

Cabinet/Case Material:

18mm Plywood

Handles:

2 × Wooden handle

Grille:

Polyurethane finish, black powder coating for grille.

Color:

Black

Size

Dimension (W x D x H):

972 x 774 x 710mm / (38.3 x 30.5 x 28in)

Package Dimensions (W x D x H):

1095 x 890 x 830mm / (43.1 x 35 x 32.7in)

Weight

Net Weight:

92 kg / 202.8 lb

Gross Weight:

100 kg / 220.5 lb

SLA2218SP Application

SLA2218SP Installation

SLA2218SP Parts

SLA2218SP Cases

SLA2218SP Collocation

Videos

Downloads

Filename	Version	Language	Size	Updated
β3 SLA2218SP Datasheet	1.0		200KB	2026-09-27 15:17:31

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