Wisdom Series LS4m

Line Source On-Wall Loudspeaker

The Wisdom Series LS4m 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 LS4m 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 LS4m yield breathtaking performance including low distortion, detail, dynamic range, transparency, horizontal dispersion, sound stage imaging and maximum output capability.


Key Features

Line Source

Eliminate floor and ceiling reflection

Enhance clarity

More power over distance

Share experience

Planar Magnetic

Highly Detailed & Dynamically Accurate

(1)  80” Planar Magnetic Driver

Covers 8 Octave of Clarity

Light Weight Film PEEK

FAST acceleration


Available as In-Wall LS4i

Available as Free-Standing LS4

Stackable LS4i

Custom Colors Available LS4 and LS4m


More Features

80Hz – 20kHz

Two-way Planar Magnetic Driver

Outboard Active Crossovers (DSP Required)

(2) Channel of Power Amplification

Per loudspeaker required

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 point source. This is great benefit when designing entertain net space in large modern open floor living space as well as multi tiers theaters.


Frequency response 80Hz – 20kHz ± 2dB relative to the target curve
Impedance, tweeter 4.25 ohms
Impedance, midrange/bass 4.25 ohms
Sensitivity 100 dB / 2.83 V / 1m
Shipping weight 550 lbs. (250 kg)
Dimensions HxWxD 86.54” x 28.5” x 11.83” (219.8cm x 72.4cm x 30.5cm)