LB18 - Compact mid-size line-array LF extension

  • High-performance line-array low frequency extension system
  • Forms high-output line-array extension in combination with LR18
  • Maximum dynamic headroom reserve with lowest distortion
  • All Neodymium drivers for excellent performance-to-weight ratio
  • Large, centrally-located vents for improved breathing and low compression
  • SIS™ pre-wired for very high damping and further reduced distortion

Product description

The LB18 is a low-frequency line-array module for medium to large sound reinforcement applications; It is designed as LF array extension of the LR18 pro-ribbon line-array.
In combination with LR18, high output arrays can be formed for high-end sound reinforcement, where precise projection and long-throw is required down to the lower frequencies.

Adding LB18 modules enlarges the array length, extending the controlled (cylindrical) projection of the LR18 down to the lower frequencies, while increasing throw of the low-mid frequencies over distance.

The LB18 consist of 2 long-excursion 8” woofers in a centrally-vented configuration. The 8” woofer features a large, oversized 3” voice-coil Neodymium motor structure and dual-spider suspension with forced-venting, surpassing the output of even larger sized drivers, while maintaining an unobtrusive face print.

For full system performance, the LB18 is driven and controlled by the ALC amplified loudspeaker controller; Driven by the ALC, the LB18 delivers maximum sound quality and output power with long-term operation reliability. The integrated factory presets in the drive processor of the ALC offer gain, phase and filtering matching, as well as array-length correction in combination with the LR18 system.

The Signal Integrity Sensing™ pre-wiring ensures dynamic cable/connector compensation between the LB18 and ALC, significantly increasing response accuracy of the low frequencies. This offers a 1:1, undistorted natural sound reproduction, regardless of cable length and amplifier impedance load (system damping factor of 10.000).

The rigging system is fully compatible with that of the LR18; The rigging system enables angle-setting on the cabinets, without lifting the array, resulting in safer and faster set-up with minimal handling. It has a WLL of 32 cabinets under 10:1 safety (or weight-equivalent in combination with LR18).

The LB18 is part of “The Ribbon Network” inventory and comes with a 6-years “no hassle” warranty.

Array configurations can be simulated in the Alcons Ribbon Calculator (ARC), Alcons’ high-resolution 3D simulation program.

Dimensional drawing

Technical specifications

Frequency response 70 Hz – 250 Hz (+/- 3dB)
  51 Hz -             (+/-10dB)
Sensitivity nominal 96 dB (50 - 200 Hz)
Nominal impedance 8 ohms
Recommended drive ALC Sentinel10
Nominal SPL peak 127 dB (Sentinel10 50 - 200 Hz)
Dispersion H x V (single) Omni

Physical specifications

System 1-way, limited bandwidth
Drivers LF 2x AW8.3ND-16 8”, vented
Connectors 2x Speakon NL4 input / link
Physical dimensions  
Height 226 mm / 8,9 inch
Width 790 mm / 31,1 inch
Depth 436 mm / 17,2 inch
Weight (approx.) 20 kg / 44,1 lb
Warranty 6 years limited

Due to Alcons Audio continuous R&D, all specifications are subject to change, without prior notice.

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