Self Powered



LSS's SP425 2-way loudspeaker system provides high output, low distortion sound reinforcement for the entire range of pro audio applications.

Speaker Power

540 W (EIAJ) - 4 Ohms
1080 W (PEAK) - 4 Ohms

• Horizontal 90° 
• Vertical 40°
(96dB 1 Watt @ 1 m)
123 dB Max SPL (EIAJ) calc.
126 dB Max SPL (PEAK) calc.

  • SP425 F6a11208ed
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The 250 mm (10") low frequency cone and 44 mm (1.75") voice coil high frequency compression driver provides higher output and lower distortion plus enhanced power handling capabilities for better performance in both portable and permanently installed applications. The SP425 powering mode is active with digital amplifier


The SP425 was designed for distributed systems, the 13° per side trapezoid angles match the 90° horizontal coverage pattern allowing the creation of tight packed clusters.
The pole mount cup and balance-optimized handles allow for quick and easy load-in for portable use.
Its high output capabilities let it act as a main system for smaller concert or portable A/V events or even provide front or side fill for concert touring applications. The comprehensive system mounting points permit safe suspension in permanent installations.

  • 10" LF in Vented Enclosure
  • 1.75" Compression Driver with Rotable Horn
  • Fly Mounting Points and Pole mount Cup Included
  • Powering Mode: Bi-Amp Active with Digital Amplifier
  • For Portable or Permanent Installation


Dimensions mm (±1 mm)
• Height 510
• Front Width 320
• Rear Width 165
• Depth 365
• Trapezoid angles (degrees) 13° per side

Weights Kilograms
• Net Weight 21
• Shipping Weight 24
• System Configuration 2-way full range

Enclosure Material
• Enclosure Material: Birch Plywood of 15 mm
• Finish: Texture Polyurethane Black Paint
• Suspension: 12 Point Mounting Suspension M10
• Grille: Powder Coated Perforated Steel with anti-dust foam
• Connectors: XLR IN & OUT, AC Power: 240V, VDE Connetor
• Optional Accessories: Fly Clip with Ring, Speaker Soft Bag


Frequency Response 
• ±5 dB 65Hz to 18KHz
• -10 dB 45Hz

Sensitivity (dB 1 Watt @ 1 m)
• Full Range Passive 96dB
• LF 96dB
• HF 103dB

Max SPL Calculated
• 122 dB

Nominal Input Impedance (Ohms)
• Full Range Passive 4
• LF 4
• HF 16 

Power Handling (Watts EIAJ)
• 450 W

Nominal Dispersion (degrees @ - 6 dB)
• Horizontal 90°
• Vertical 40°

Product Series SP
• LF Subsystem & Loading One 250  mm (10") woofer vented
• HF Subsystem & Loading One 25 mm (1") exit/44 mm (1.75") voice coil
• Crossover DSP Active
• Operating Mode Active with digital Amplifier


• OCTO18
• DG118


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