The LS4 element is a very compact and extremely powerful high-output speaker that exceeds all the expectations about how a Line-Source system should sound. It is an active 4-way system with a operating frequency bandwidth from 60Hz to 20Khz. This response is lowered down to 28Hz with the addiction of the SB118 or SB221 Subwoofers. LS4 features four 8” drivers in a bass-reflex tuned enclosure and a 1.5” compression driver coupled to our patented (Elliptic Plane Progression isophasic Coupler) (Eppic®) waveguide for HF reproduction.

The 8” drivers are powered in a way that all four are actually working in parallel at Low frequencies, providing the surface area equivalent to a 15” loudspeaker. At the Mid frequencies however, only the two front coplanar V-shaped transducers are working, aiding the HF waveguide to deliver a symmetric horizontal coverage of 100º without secondary lobes over the entire frequency range.

The LS4 comes pre-wired, complete with rigging hardware, power and control electronics and delivered in road cases.

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Technical Info

Usable Bandwidth: 60 Hz - 20 kHz
Nominal Directivity: 100° Horizontal - Symmetric
Maximum Continuous SPL: 130 dB
Power Handling: 1300 W RMS


LF: 4/4 x 8’’ (All 4 working) weather-resistance 2 x 16 ohm
MF: 2/4 x 8’’ (Only front V-shaping) weather-resistance 2 x 16 ohm
HF: 1 x 1,5’’ HF compression driver 16 ohm


Angles from 0° to 5° in 0,25° linear step increment

Physical Data

Width: 756 mm

Height: 270 mm

Depth: 581 mm

Weight: 36 Kg

Material: Baltic Birch Plywood

Connections: 2 x 8 Pin Speakon