MartinLogan Vista Specifications download pdf (Page 13)

Room Acoustics 13

ond. If your speaker system is not securely planted on the

floor or solid surface, it can shake as it produces sound

and, consequently, the sound can be compromised. If

your speaker is sitting on the carpet and only foot gliders

are used, the bass can be ill defined and even boomy. The

use of spikes is recommended to insure secured footing for

your speakers. (See ‘Solid Footing’ for spike information

and installation instructions).

Dipolar Speakers and Your Room

MartinLogan electrostatic loudspeakers are known as dipo-

lar radiators. This means that they produce sound from

both their fronts and their backs. Consequently, musical

information is reflected by the wall behind them and may

arrive, either in or out of step, with the information pro-

duced by the front of the speaker.

The low frequencies can either be enhanced or nulled by

the position from the front wall. Your Vista’s have been

designed to be placed two to three feet from the front

wall (the wall in front of the listening position) to obtain

the best results; however, your room may see things dif-

ferently. So listening to the difference of the bass response

as a result of the changes in distance from the front wall

can allow you to get the best combination of depth of bass

and tonal balance.

Now that you know about reflective surfaces and reso-

nant objects, you can see how the midrange and high

frequencies can be affected. The timing of the initial wave

as it radiates to your ears, and then the reflected informa-

tion as it arrives at your ears later in time, can result in

confusion of the precious timing information that carries

the clues to imaging. Consequently the result is blurred

imaging and excessive brightness. Soft walls, curtains, wall

hangings, or sound dampeners (your dealer can give you

good information here) can be effective if these negative

conditions occur.

Solid Footing

After living and experimenting with your Vista’s, you may

want to use ETC (energy transfer coupler) spikes sup-

plied with the Vista (see figure 7). With the use of these

spikes, the Vista will become more firmly planted on the

floor and, consequently, bass will tighten and imaging

will become more coherent and detailed. It is best not to

implement the spikes, however, until you are secure in

the positioning, as the spikes can damage the floor if the

speaker is moved. The feet that attach to the bottom of

the Vista use a common

/4 - 20 thread.

Spike Installation Instructions:

1 Carefully lay your speaker on its side to gain access to

the bottom.

2 Remove existing feet or spikes. Thread new spikes into

holes and screw them in all of the way. If the speaker

does not sit level loosen one spike until level is achieved.

3 Tighten the jam nut snugly by hand. Do not over tighten

the nut.

4 Right the speaker.

Caution: Make sure your hands and any cabling are

clear of the spikes. Do not slide speaker as spikes are

sharp and can damage your floor or carpet.

5 Adjust to level by rotating spikes. Tighten the jam nut

securely when satisfied that speaker is level.

Caution: Walking the speaker may result in a broken spike.

Figure 7. The ETC™ Spike.

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MartinLogan Vista Specifications Page 13

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