Dispersion Interactions; Controlled Horizontal Dispersion; Controlled Vertical Dispersion; Three Major Types Of Dispersion - MartinLogan Montis Manuel De L'utilisateur

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Controlled Horizontal Dispersion

Your Montis's launch a 30 degree horizontal dispersion pattern.

This horizontal dispersion field gives a choice of good seats for the

performance while minimizing interactions with side walls (see

figure 9). Make sure both speakers stand exactly at the same verti-

cal angle, otherwise the image can be skewed or poorly defined.

The wave launch of both speakers is extremely accurate in both

the time and spectral domain. Consequently, small refined adjust-

ments can result in noticeable sonic improvements.

Controlled Vertical Dispersion

As you can see from the illustrations, your Montis speakers proj-

ect a controlled dispersion pattern (see figure 10). Each Montis

is a 44 inch line source beginning 13.75 inches above the base.

This vertical dispersion profile minimizes interactions with the

floor and the ceiling.

Figure 5– 6. As can be seen here, point source

concepts invite a great deal of room interaction.

While delivering good frequency response to a

large listening audience, imaging is consequent-

ly confused and blurred.

Figure 7–8. Even though they suffer from

"venetian blind" effect, angled multiple panel

speakers can deliver good imaging, but only

to specific spots in the listening area.

Figure 9–10. A controlled 30 degree cylindri-

cal wave-front, a MartinLogan exclusive, offers

optimal sound distribution with minimal room

interaction. The result is solid imaging with a

wide listening area.

IsPersIon

Three Major Types of Dispersion

It is a known fact that as the sound wave becomes progres-

sively smaller than the transducer producing it, the dispersion

of that wave becomes more and more narrow, or directional.

This fact occurs as long as the transducer is a flat surface. Large

flat panel speakers exhibit venetian blind effects due to this

phenomenon. This is one reason why many manufacturers opt

for small drivers (i.e. tweeters and midrange) to approximate

what is known as a point source wave launch.

Historically, most attempts to achieve smooth dispersion from

large flat panel transducers resulted in trade-offs. After exhaus-

tive testing of many different methods, we conceived an

elegantly simple, yet intensely hand crafted process. By curving

the radiating surface, we create the effect of a horizontal arc.

This allows the engineers at MartinLogan to control the high fre-

quency dispersion pattern of our transducers.

nteraCtIons