Bose Panaray MA12 Landasan Teknis & Diskusi - Halaman 24

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Bose Panaray MA12 Landasan Teknis & Diskusi

speaker can be mounted high on a wall and the radiation pattern steered down to the audience

area on the floor.

Why did Bose elect not to use

sought a pure wedge-shaped radiation pattern, not a variety of different, selectable radiation

patterns. We did this so that we could cover a large audience area from a speaker located at

ear height. For this, no

high in the air is needed, then this seems to us an ideal application for traditional hang-and-

tilt speakers, which have shown in countless facilities to meet basic customer requirements at

a fraction of the cost of using many channels of

effect.

High-output arrays for touring systems

is a class of speakers that use much larger and more powerful transducers in much

HERE

larger enclosures than what is used in the MA12 . As a result, these speakers are much larger,

and more expensive than the MA12. As a result– in addition to the differences in transducer

complements - the most important difference between these speakers and the MA12 is the

markets for which they are intended. They are very clearly aimed at large touring sound

systems for musical groups playing in stadia and arenas. The MA12 is aimed at the heart of

the installed sound market. While philosophically similar, these products are far too large, far

too powerful, and far too expensive for our target markets.

Column like speakers

last category is speakers that look like line arrays but really are not. They are really

spherical-wave sources housed in line-shaped enclosures. This is not to say that the

manufacturers are making false claims, but merely to note that a line-shaped source may not

house an acoustical design intended to behave like the line sources we have discussed here.

An example of these speakers uses four 4" (10.2 cm) drivers and three tweeters in a line.

This design and others like it, while having features that can have advantages in certain

applications, do not attempt to achieve pistonic behavior over the length of the line and over

a wide range of frequencies. The four drivers in this configuration could be too widely spaced

for this purpose, for example. Similarly the tweeter array in the middle may not be tall

enough to produce a wedge-shaped radiation pattern at the lower part of its frequency range;

the array is simply not tall enough, and the drivers not densely- packed enough. These

speakers behave more like conventional loudspeakers, albeit with narrower vertical radiation

patterns.

Bose

MA12™ Modular Array: Technical Foundation & Discussion

in the MA12™ Modular Array ? First, in our solution we

DSP

is needed and thus none is used. Second, if a speaker positioned

DSP

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and amplification to achieve the same

DSP