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14
English
Solid Coupling
Your loudspeaker system generates frequency vibrations or
waves into the room. This is how it creates sound. These vibra-
tions vary from 20 per second to 20,000 per second. 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 dipolar
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 produced by the front of
the speaker.
The low frequencies can either be enhanced or nulled by
the position from the front wall. Your Neolith’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 differently. 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 com-
bination 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 pre-
cious timing information that carries the clues to imaging.
Consequently the result is blurred imaging and excessive
brightness. Soft walls, curtains, wall hangings, or sound damp-
eners (your dealer can give you good information here) can be
effective if these negative conditions occur.
Solid Footing
For your convenience Neolith ships with caster wheels
installed. After living and experimenting with your speaker’s
placement you will want to use the ETC (energy transfer
coupler) spikes supplied with the Neolith. With the use of
these spikes, the Neolith will become more firmly planted
on the floor and, consequently, bass will tighten and imag-
ing 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 Neolith use a
common 3/8 - 16 thread (see figures 12 & 13).
Spike Installation Instructions:
1 Carefully tilt the speaker to gain access to the bottom. This
will require at least 2 people.
2 Remove existing feet or casters. 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 12. The ETC™ Spike.
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