L SUB 4000

L SUB 4000 is a powerful 18” double vented bandpass subwoofer. Compatible with all LINEAR 5 fullrange speakers and mid/high units, its powerful low end – ranging from 30 to 100 Hertz – is totally and powerfully impressive. L SUB 4000 A can also serve as a sub-low add-on to LINEAR SUB 2000 to beef up the bottom end when required (optional frequency separation). Filter presets are available for Lab.gruppen IPD and PLM 12K44 controllers.

  • Powerful and versatile 18” subwoofer
  • Rugged wooden enclosure of birch multiplex: 15/18 mm, 9/13 ply
  • Power handling program: 2400 W
  • 31Hz – X-Over
  • 137 dB half space
  • 1 x 18” speaker with 4” voice coil
  • Compatible with all LINEAR 5 fullrange speakers and mid/high units
Ideal add-on for setups using LINEAR 5 LTS A
  • Sub-low add-on to LINEAR SUB 2000
  • Filter presets available for Lab.gruppen IPD and PLM 12K44 controllers
  • Made in Germany
L SUB 4000
Power-handling nominal (RMS)1200 W
Power-handling, program2400 W
Power-handling, peak4800 W
Nominal impedance4 ohms
Max SPL135 dB half space (@ 10% THD)
Max SPL peak137 dB half space (@ 10% THD)
Sensitivity 1W/1m106 dB half space
Frequency response +/- 3 dB39 Hz - X-over
Frequency response -10 dB31 Hz - X-over
LF Speaker1x 18" (4 ohms) with 2.5" voice coil featuring advanced ventilated voice coil gap (Neodymium)
Crossover frequency100 Hz, active X-over with controller amp (can be set lower when used as a sub-low)
Connections2x Speakon NL4, pin assignment switchable between 1+/1- and 2+/2-
Pole mount2x M20
Handles8, integrated
Castersoptional 100 mm
EnclosureBirch multiplex
Grille2 mm metal grille backed with black acoustic foam
FinishAcrylic enamel, black
Optional accessoriesProtective cover, M20 Distance Pole Add-On, 100 mm casters, Wheelboard, TiltUnit
Dimensions (WxHxD)91 x 51 x 81 cm
Weight57.1 kg / 125.9 lbs
(Set of 2 x DFP)

Double flange plate. For attaching two distance poles with M20 threads to one subwoofer. Delivers acoustically correct, horizontal clusters of L5 LTS units in stacking setups.

Stereo Pole Add-on M20

The add-on set consists of two height-adjustable König & Meyer M20 distance poles, two high-quality XLR or Speakon cables and a carry bag.

Tilt Unit

The tilt unit permits perfect satellite-to-audience alignment and tilt protection using a full stack system.


Padded covers are available as optional accessories for all Linear SUB models.

WB-4 Wheel Board

Professional wheel board for L SUB 4000 (A). Four 100 mm casters (two with braking mechanisms), two integrated handles.

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