Wisdom Seres LS4i


RESI Award LogoLS4 Excite Award WinnerLS4 CEDIA Manufacturers Excellence Award Finalist

Line Source In-Wall Loudspeaker

The Wisdom Series LS4i is the latest planar magnetic thin-film technology and represents an uncompromised engineering effort to achieve the ultimate in music and film sound reproduction. With 80” of Planar Line Source, it is ideally suited for installation behind an acoustically transparent screen, as a main speaker, or surround.

A single LS4i is capable of reproducing sound pressure levels in excess of 130 dB at 12’. The 80-inch tall line source will provide seamless timbre matching and uniform dynamic expression throughout any listening space.

The LS4i yield breathtaking performance including low distortion, detail, dynamic range, transparency, horizontal dispersion, sound stage imaging, and maximum output capability.

Eliminate Floor and Ceiling Reflection

The line source design eliminates floor and ceiling reflection while distributing sound levels uniformly across the width of any room.

Power Over Distance

Line source provides a much better power constituency than a point source. This is a great benefit when designing a large modern open-floor living space as well as multitiered theaters.

Key Features

Eliminate Floor and Ceiling Reflection
Enhance Clarity
More Power Over Distance
Share Experience

Highly Detailed & Dynamic
(1) 80” Planar Magnetic Driver
Covers 8 Octaves of Clarity
Light Weight Film PEEK
FAST Acceleration

Available as On-Wall LS4m
Available as Free-Standing LS4
Stackable LS4i
Custom Colors Available LS4 and LS4m

80Hz – 20kHz
Two-way Planar Magnetic Driver
Outboard Active Crossover
DSP Required
2-CH’s of Amplification Required


Frequency Response80Hz – 20kHz ± 2dB relative to the target curve
Impedance, Tweeter4.25 ohms
Impedance, Midrange/Bass4.25 ohms
Sensitivity100 dB / 2.83 V / 1m
Shipping Weight425 lbs. (193 kg
Dimensions HxWxD84.75” x 23.75” x 12” (215cm x 60.3cm x 30.5cm)


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LS4i Owners Manual

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Wisdom Series Brochure

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LS4i Drawings (PDF)

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LS4i Drawings (DWG)

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