Thiel Audio Products CS7.2 User Manual
THI E L
Model CS7.2
Coherent
®
Source
loudspeaker
system
OWNER INFORMA TION
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INNOVATIONS
CONSUMER ELECTRONICS SHOW
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COMPONENTS OF THE YEAR
®
Speaker of the Millennium
image hifi
ongratulations on your purchase of
C
the THIEL CS7.2 Coherent Source
loudspeaker system. The CS7.2 is the
result of a long and dedicated effort to
provide the most accurate music
reproduction possible. We have used
only the highest quality components and
taken great care in the CS7.2’s
construction. Properly set up and used
with good associated equipment, the
CS7.2 will provide a great deal of
musical enjoyment for many years.
®
CONTENTS
Design philosophy..................................1
Positioning the speakers ....................... 2
Connecting the speakers ....................... 5
Leveling feet ......................................... 5
Break-in ................................................ 6
Associated equipment........................... 6
Power requirements .............................. 6
Service .................................................. 7
Cabinet Care ..........................................7
Grille ......................................................7
Warranty ............................................... 9
DESIGN PHILOSOPHY
The CS7.2 is a precision
instrument designed to translate,
as accurately as possible,
electronic information into
musical sound. All our efforts
have been directed toward
achieving extremely faithful
translation of all tonal, spatial
and dynamic information
supplied by the amplifier.
The CS7.2 is not intended to
mask or mitigate shortcomings
of the recording or other
components in the music
playback system.
We believe this approach is
the only way to provide the
potential of experiencing all the
subtle aspects that help make
reproduced music a most
enjoyable human experience.
Jim Thiel
1
POSITIONING THE SPEAKERS
Because of their unipolar radiation pattern and co-axial design, the CS7.2s will provide good results when placed in
a variety of room locations. However, speaker placement will affect the accuracy of timbre, spatial performance, and
bass performance. Here are some guidelines to help you achieve the best sound from your speakers. (The pointed
metal stabilizer pins should not be installed until the final positioning has been determined.)
All aspects of speaker placement are dependent on the particulars of the room. Since every room is different, no
hard rules can be given, and experimentation is necessary to achieve the best results.
Distance from walls
The CS7.2s, like most speakers, sound best if
Direct sound
Reflected sound
Difference in arrival times
they are placed well away from all walls. Such
placement optimizes imaging characteristics,
and musical timbres are reproduced with the
least coloration because the initial sound
coming from the speaker is distinctly separated
in time from the secondary sound of wall
reflections. If reflections are heard too soon
after the primary sound, the brain tends to
interpret them as part of the initial sound,
causing the perceived timbre to be altered and
the spatial characteristics to be confused.
Figure 1 illustrates the problems caused
by early side wall reflections. Sound waves
Figure 1. Early reflection problems caused by speakers placed
too close to side walls
from the loudspeakers radiate both forward,
toward the listener, and laterally, reflecting off
side walls. When the speaker is placed too
close to side walls, the difference in arrival
Direct sound
Reflected sound
Difference in arrival times
times of the primary sound waves and the
reflected sound waves is too short for the brain
to discriminate between them.
Figure 2 illustrates the advantages of
placing the loudspeakers farther from side
walls. The arrival times of the primary, forward
radiating sound waves and the secondary,
reflected sound waves are well separated,
providing the proper delay needed for faithful
tonal and spatial reproduction.
There will also be a noticeable improvement in openness when the speakers are even
Figure 2. Optimum placement for reducing reflection problems
two feet from the rear wall instead of one. If
possible, we prefer the speakers at least three feet from the rear wall and at least five feet from the side walls. Also,
it is not desirable for large objects to be placed very near the speakers since these will also be a source of unwanted
early reflections that reduce imaging accuracy.
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