Tectonic LS-118 Subwoofer

The new LS-118 Subwoofer uses a front-loaded, single 18-inch woofer that features a bent bass reflex port. It delivers excellent dynamics and output from a compact cabinet profile that can be easily ground-stacked or hung in multiples of two, three or four units. Rated to handle 2400 watts of program power and 3600 watts of peak power, this new model is compatible with Tectonic Distributed Mode Loudspeakers (DMLs) and other mid to high frequency speaker systems.


  • Woofer Size: 18.00″ (457mm)
  • Voice Coil Diameter: 4.00″ (100mm)
  • Magnet Type: Neodymium
  • High efficiency/low extension woofer design
  • Advanced neodymium magnetic motor structure
  • Lightweight 18-inch carbon fiber loaded cone with progressive, high excursion, constant geometry triple roll surround
  • Dual spider design with silicone based damping control
  • 4-inch, inside/outside wound, high temperature composite polyamide coil assembly
  • Innovative voice coil ventilation system for higher output and less power compression

Construction Features

  • Front Loaded with bent bass reflex porting
  • Hardware/Flyware: (8) M10 attachment points
  • Four bottom and four top feet allows cabinet to be stacked in a variety of positions
  • Locating and locking cutouts on top and bottom surfaces allows stacking of additional LS-118 and LS-212 cabinets
  • M20 pole mount top hat
  • Dimensions (inch): 27.55” W x 23.72” H x 29.52” D
  • Dimensions (mm): 700 W x 602.6 H x 750 D
  • Weight (lbs/kg): 115 lbs. (52Kg)

Performance Specifications

  • Frequency Response: 36Hz – 120Hz (-3dB)
    32Hz – 140Hz (-10dB)
  • Sensitivity: 98dB @ 1W/1 Meter
  • Max SPL Long-term: 130dB
  • Max SPL Peak: 136dB
  • Recommended high pass: 24 db/Oct at 35 Hertz

Settings & Impedance

  • Nominal Impedance: 8 Ohms, NL4 connector can be used to connect 2 cabinets in parallel (4 ohms) as well as passing signal thru for connection to another LS-118 running in 8 ohm mode


  • Continuous Power Rating: 1200W AES (8 Ohms)
  • Program / Peak Power: 2400W/3600W (8 Ohms)
  • Recommended Amplification: 3000W (8 Ohms)
Suggested filter sets, crossover types, and slopes are intended to provide a basic starting point for operation.
For further assistance please contact Technical support.


  • WOOFER SIZE18.00” (457mm)
  • VOICE COIL DIAMETER4.00” (100mm)
  • MAGNET TYPENeodymium


Spec Sheet