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Critical Zone: 500Hz–20kHz

The most significant advantage of MartinLogan’s exclusive

transducer technology reveals itself when you look at

examples of other loudspeaker products on the market today.

The Script uses no crossover networks above 500 Hz because

they are not needed. The Script consists of a single, seamless

electrostatic membrane reproducing all frequencies above

500 Hz simultaneously. How is this possible? 

First we must understand that music is not composed of

separate high, mid and low frequency pieces. In fact,

music is comprised of a single complex waveform with all

frequencies interacting simultaneously. 

The electrostatic transducer of the Script essentially acts as

an exact opposite of the microphones used to record the

original event. A microphone, which is a single working

element, transforms acoustic energy into an electrical signal

that can be amplified or preserved by some type of storage

media. The Script’s electrostatic transducer transforms elec-

trical energy from your amplifier into acoustical energy.

Due to the limitations of electromagnetic drivers, no

single unit can reproduce the full range of frequencies.

Instead, these drivers must be designed to operate within

narrow, fixed bandwidth of the frequency range, and then

combined electrically so that the sum of the parts equals

the total signal. While nice in theory, we must deal with

real-world conditions.

In order to use multiple drivers, a crossover network is

enlisted to attempt a division of the complex musical signal

into the separate pieces (usually highs, mids, and lows) that

each specific driver was designed to handle. Unfortunately,

due to the phase relationships that occur within all crossover

networks and during the acoustical recombination process,

nonlinearities and severe degradation of the music signal

take place in the ear’s most critical zone (See Figure 20).

The Script’s electrostatic transducer can single-handedly

reproduce all frequencies above 500 Hz simultaneously.

You have in one transducer the ability to handle in elegant

simplicity the critical frequencies above 500 Hz.

The crossover phase aberrations that are associated with

traditional tweeter, midrange, and woofer systems are

eliminated. The result is a dramatic improvement in imaging

and staging performance, due to the minutely accurate

phase relationship of the full-range panel wave launch.

Tweeter

Midrange

Woofer

Conventional Loudspeaker

MartinLogan Script

Figure 20. This diagram illustrates how a conventional
speaker system must use multiple crossover networks
that have negative effects on the musical performance.

Full Range Operation

crossover point (2–5kHz)

crossover point (500Hz)

crossover point (100–500Hz)

Woofer