Measuring 680mm wide x 559mm high x 775mm deep, the installation version of the L18 sub employs a 18″ long excursion driver in Baltic birch / poplar plywood cabinet with a fabric covered grille and threaded inserts for mounting accessories, and quick-connect push connector. With a frequency range of 32Hz-120Hz, and 140dB Peak SPL, the L18-I is perfect for extending the low frequency response of P+ Series installations.

Key Features

  • Install version of L18 sub
  • Fabric grille cover and quick-connect push connector
  • Extends LF performance to 32Hz
  • 140dB peak SPL
  • Threaded inserts on the back and on both sides for connection of mounting accessories
  • Available in black, white and custom RAL colours


Frequency Response (+6 dB)32 Hz - 120 Hz
Peak SPL Level (1m)140 dB Peak
Recommended Amplifiers1550 to 2450 Watts / 4Ω
Crossover Frequency60 Hz, 85 Hz, 120 Hz
Nominal Impedance


Components1x 18" – 4 ohms – Long excursion – Neodymium driver
ConnectorsQuick-connect push connector
Rigging Points1 x Universal accessory fit on each side + 1 x M20 thread for Pole Stand on top
MaterialCustom made bent plywood of Baltic birch and poplar
FinishBlack or white structural paint
Front FinishFabric covered front grille
Weight50 kg
Height x Width x Depth559mm x 680mm x 775 mm (22.0” x 26.8” x 30.5”)
Operating Temperature Range0°C - 40°C (32°F - 104°F)
Storage Temperature Range20°C - 60°C (-4°F - 140°F)
System Operation
Recommended Powering Solution NXAMP4X2MK2: 1 x L18 per channel
Optional Powering SolutionsNXAMP4X1MK2 (Bridged): 1 x L18 per channel
NXAMP4X4MK2: Up to 2 x L18 per channel