Subwoofer unit in direct radiation configuration

Compact & extremely powerful, 3400W sub-bass unit in direct radiation configuration. Dual 18” (4.5” voice coil) neodymium transducer.


The CLS-218SP is a high-output, extremely powerful sub-bass element designed to be used in unison with the coaxial CLS-212P line array module.

It uses two low distortion 18” (4.5” Split winding copper voice coil) custom speaker with double silicon spider with optimized compliance, ventilated voice coil for reduced power compression and aluminium demodulating ring for very low distortion.

Designed to be used either as a standard sub bass unit or easily configurable in cardioid configuration thanks to integrated front & rear power connectors enable a discreet installation without any cables visible at the front of the cluster. The extra strong, especially designed internal wooden reinforcements reduce unwanted vibrations eliminating any noise, lowering distortion and delivering a clear sound. At the same time, the bass port is designed with a flare to eliminate any turbulence caused by sharp edges in the sound waves path.

The system is amplified with the HPX-12000/DSP, it is a 4 x 3000W @ 4Ω amplifier with PFC (Power Factor Correction) and offers exceptional efficiency with maximum system performance whilst significantly lowering power consumption. With Thermal, short-circuit and overload protections the amplification delivers superior sonic performance. Coupled together with our latest generation, 64 bit/96KHz processor the system electronics are yet further guaranteed not only the utmost protection but the best sonic performance.

Designed in-house by Lynx Pro Audio engineers our DSP offers the most recent advances in digital processing, delivering a linear phase & frequency response. The latest 32 bit/96KHZ AD/DA converters make the system one of the most advanced & innovative line arrays on the market resulting in superior sound quality.

Two Ethernet ports enable the system to be controlled with the OCS platform for easier alignment, monitoring and processing of the array and together with the new Rainbow 3D prediction software delivers a complete system design tool.

The enclosure is made from premium grade birch plywood and finished with a polyurea coating for longer durability & weather protection. It also has a number of dedicated accessories available.

Key features

Extraordinary high power output

Front & rear audio and power connectors for cardioid applications

Ergonomic design in premium birch plywood & finished in polyurea

Stackable and flyable standard and/or cardioid configuration


Perfectly suited for:

→  Touring and fixed installations
→  Sports stadiums
→  Houses of worship
→  Club installations
→  Concert halls and auditoriums
→  Low frequency complement for CLS-28P and CLS-212P

Technical Data


LF: Dual 18” Neodymium magnet transducer. 4.5” split winding copper voice coil. Waterproof cone treated on both sides. Aluminium demodulating ring for very low distortion. 1700 W (AES)
Frequency range 25 Hz – 250 Hz (preset 100 Hz)
Frequency response
30 Hz – 100 Hz (preset 100 Hz)
28 Hz – 80 Hz (preset infra)
Coverage Quasi omnidirectional
Max SPL / Peak
136 dB / 142 dB
Sensitive 1w/1m half space 101 dB
3400W / 6800W / 13600W peak
Impedance 4 Ω
Bass-reflex direct radiation enclosure
Finish Polyurea coating, high grade resistant paint
15 mm / 18 mm premium birch plywood
Dimensions 600 x 1200 x 770 mm (H x W x D)
81 Kg (178.5 lbs)

Calculated maximum SPL based on rated peak power and measured sensitivity.

More features

Hardware for CLS-218SP

The CLS-218S cabinet is constructed from 11-ply and 13-ply premium birch plywood (15mm & 18mm thickness). The enclosure is finished with polyurea coating.

Internal design

The internal structure of the CLS-218S is heavily braced for greater longevity and all parts are assembled on metal inserts with metric screws. The amplification modules & DSP are housed in a separate chamber to the drivers avoiding excessive heat & vibration, thus delivering greater efficiency and reliability.

Rear panel

The powder coated steel front panel contains connections to power and signal for cardioid operation.


The CLS-218S has three heavy duty, powder coated front grille with a special acoustic rear fabric to protect the transducers against dust and dirt.


The CLS-218S has six ergonomic handles with firm internal grip, three on each side of the enclosure, to facilitate transport, positioning and loading of the cabinets.


The CLS-218S has two transport options: front squid cover with wheels (100mm) and a metal transport dolly for up to three CLS-218S enclosures.

Accessories for CLS-218SP


Kit to connect SV-CLS10 or SV-CLS20 flying frame and M20 plate


Removable front transport dolly for CLS-218S



Dolly for 2 CLS-218S

Rain cover for CLS-118S / CLS-121S / CLS-218S


Nylon protection cover for CLS-218S


Nylon protection cover for 2 CLS-218S


Nylon protection cover for 3 CLS-218S

Other products from this series

2 x 8″, 1 x 8″ dual diaphragm coaxial planar wave driver, 2800W Class D

2 x 12″, 2 x 6.5″ dual diaphragm coaxial planar wave driver, 6000W Class D

1 x 18″, 3000W Class D subwoofer in direct radiation configuration 

1 x 21″, 3000W Class D subwoofer in direct radiation configuration