MartinLogan Source Speakers Specifications download pdf (Page 11)

on the floor or solid surface, it can shake as it produces

sound and, consequently, the sound can be compro-

mised. 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 dipolar

radiators. This means that they produce sound from both

their fronts and their backs. Consequently, musical infor-

mation is reflected by the wall behind them and may arrive,

either in or out of step, with the information produced by

the front of the speaker.

In a typical speaker system the low frequencies can either

be enhanced or nulled by the position from the front wall.

Listening to the difference of the bass response as a result

of the changes in distance from the front wall will allow

you to get the best combination of depth of bass and tonal

balance.

Now that you know about reflective surfaces and resonant

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 information 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 Odysseys, you

will then want to implement the enclosed 3/8" x 16 thread

special version ETC (Energy Transfer Coupler) Spikes (See

Figure 6). With the use of these spikes, the Odyssey will

become more firmly planted on the floor and, conse-

quently, 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.

MartinLogan ETC spikes are also available with a common

1/4" x 20 thread insert that may be used on your other

audio equipment (racks, speakers, etc.), which are avail-

able from your local MartinLogan dealer or on our website

at www.martinlogan.com.

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 visually adjust to an equal height.

3. Tighten 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.

Room Acoustics 11

Figure 6. The ETC Spike.

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MartinLogan Source Speakers Specifications Page 11

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