Stage Monitors



WM4 is a low profile monitor of high performance before feedback

Speaker Power

1200 W (AES) - 4 Ohms
• Horizontal 30° 
• Vertical 60°
(98dB 1 Watt @ 1 m)
133 dB Max SPL calculated

  • WM4 98b5189d64
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WM4 uses two 320 mm (12") low frequency cone with 75 mm (3") voice coil with double silicon demodulation rings and Neodimyium magnet. The high frequency drivers of 75 mm (3") Titanium voice coiland neodimyum magnet on asimmetrical wave guide provides higher output and lower distortion plus enhanced power handling capabilities for better performance in both touring applications. LSS's advanced crossover incuded professional protection of HF. The WM4 offers a switchable powering mode: passive operation using the internal crossover filter network or biamplified operation.


The WM4 was designed to support the widest possible range of pro audio applications. Is ideal for stage monitoring applications high output vocal presence and neutral balanced sound. WM4 use two woofers of 320 mm an 75mm HF driver on asimmetrical wave guide.

  • Dual 12" LF Neodumium in Vented Enclosure
  • High-frequency section of 3"driver coupled to asymmetrical wave guide
  • Stage Monitor for mid-high applications (main vocal,drum or Heyboard)
  • Powering Mode: Full Range or Bi-Amp (with Internal Passive Crossover)
  • For Portable Use or Permanent Installation


Dimensions mm (±1 mm)
• Height 417
• Front Width 750
• Depth 610

Weights Kilograms
• Net Weight 33.8
• Shipping Weight 36
• System Configuration 2 way full range

Enclosure Material

• Enclosure Material: Birch Plywood of 18 mm
• Finish: Texture Polyurethane Black Paint
• Grille: Powder Coated Perforated Steel with anti-dust foam
• Connectors: 2 Neutrik NL4 Speakon
• Optional Accessories: Flight Case for 2 WM4


Frequency Response
• ±3 dB 60Hz to 18KHz
• -10 dB 50Hz

Sensitivity (dB 1 Watt @ 1 m)
• Full Range Passive 98dB
• LF 98dB
• HF 103dB

Max SPL Calculated
• 129 dB

Nominal Input Impedance (Ohms)

• Full Range Passive 4
• LF 8
• HF 8 

Power Handling (Watts cont. AES)

• Full Range Passive 1200
• LF 1000
• HF 200

Peak Power (Watts)
• Full Range Passive 4800
• LF 4000
• HF 800

Nominal Dispersion (degrees @ - 6 dB)

• Horizontal 30°
• Vertical 60°


• Product Series WM
• LF Subsystem & Loading Two 320 mm (12") woofer vented
• HF Subsystem & Loading One 75 mm (3") exit/75 mm (3") voice coil with asimmetrical wave guide
• Crossover 2 way 12/18dB
• Sistem Protection HF
• Operating Mode Passive or BI AMP (passive LF/HF)


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