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4

Some rooms, especially narrow ones, can

benefit from placing the speakers along the

long wall. Although space behind the

speaker and behind the listener is reduced,

this positioning increases the space

between the speakers without side wall

interference, and can improve overall

performance. 

Figure 4

 shows the same

average size room as 

Figure 3

, but with

long wall placement. The speakers should

be at least a foot from the rear wall, but the

amount of toe-in can be adjusted, along

with listener position, as well as the amount

of spacing between the speakers.

In a larger room, the optimum posi-

tioning suggestions on pages 2 and 3 are

easier to implement. 

Figure 5

 shows one

set-up with the speakers five feet from the

side walls, three feet from the rear wall,

and the speakers aimed straight ahead. This

arrangement  provides an ample amount of

space around the speakers to reduce

unwanted reflections and should give

excellent spatial performance and a very

“open” sound. Other placement options in

this room include: wider spacing between

the speakers, adding toe-in as the spacing

increases; increased space between the

speaker and the back wall to improve

imaging depth. Various listening position

distances can also be tried.

As mentioned at the beginning of the

positioning section, all rooms are different

and no hard rules can be given. Even rooms

with similar dimensions can have differ-

ences in wall, floor and ceiling construction

that greatly affect the sound. Also, “live”

rooms with hard surfaces, glass, and little

damping sound much different from “dead”

rooms with heavy carpet, drapes and plush

furniture. In other words—EXPERIMENT.

Figure 5. Large listening room speaker placement

Figure 4. Average listening room with long wall placement

8'

3'

5'

12'

8'

5'

3'

18'

25'

8-12' Listening Distance

1'

8'

1'

18'

14'

8-10 ' Listening Distance

10'

10'

4'

4'

Summary of Contents for Coherent Source CS3.7

Page 1: ...THIEL Model CS3 7 Coherent Source loudspeaker system OWNER INFORMATION ...

Page 2: ...e highest quality components and taken great care in the CS3 7 s construction Properly set up and used with good associated equipment the CS3 7 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 Grille 7 Outrigger Base optional 7 Care 7...

Page 3: ...ion of all tonal spatial and dynamic information supplied by the amplifier The CS3 7 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 1 Jim Thiel Founder Chief Des...

Page 4: ... perceived timbre to be altered and the spatial characteristics to be confused Figure 1 illustrates the problems caused by early side wall reflections When the speaker is placed too close to side walls the difference in arrival times between the primary sound waves and the reflected sound waves is too short for the brain to discrimi nate between them Figure 2 illustrates the advantages of placing ...

Page 5: ...peaker is from the listener although this will depend on the width of the room narrow rooms require more narrow placement If the speakers are too far apart for the room there will tend to be a hole in the middle of the soundstage if they are too close together the image will be compressed and will not achieve optimum width Aiming Depending on the room in which they are used the CS3 7s can be aimed...

Page 6: ...provides an ample amount of space around the speakers to reduce unwanted reflections and should give excellent spatial performance and a very open sound Other placement options in this room include wider spacing between the speakers adding toe in as the spacing increases increased space between the speaker and the back wall to improve imaging depth Various listening position distances can also be ...

Page 7: ...are able to rock slightly and will vibrate in reaction to forces the speaker generates to move the driver diaphragms Every action has an equal and opposite reaction This motion slightly reduces the music s clarity To eliminate this effect the CS3 7s can be used with four stabilizer feet on uneven surfaces or on carpeted floors to provide a more solid footing and allow the speaker to couple more fi...

Page 8: ... power Most everyone will be happier with a 100 watt amplifier of high sonic quality than a 200 watt amplifier of mediocre sonic quality For this reason we feel there is no substitute for listening in making your amplifier decision The question how much power do I need does not have the simple answer most people expect because it is not determined only by the loudspeaker s efficiency but also by t...

Page 9: ...stallation instructions are included with the Outriggers CARE The cabinets possess a high quality lacquer finish that is both beautiful and durable However any wood finish can be damaged by excessive moisture dryness or direct sunlight When cleaning your speakers avoid using oils waxes or polishes that contain silicone We recommend Endust Dusty grilles can be cleaned by using the upholstery attach...

Page 10: ...m traffic 50 Light traffic normal conversation quiet office 60 Air conditioner at 20 feet sewing machine 70 Vacuum cleaner hair dryer noisy restaurant 80 Average city traffic garbage disposals alarm clock at two feet We Want You Listening For A Lifetime Used wisely your new sound equipment will provide a lifetime of enjoyment Since hearing damage from loud noise is often undetectable until it is t...

Page 11: ...ostpaid This warranty does not cover damage due to accident or abuse and is void if the unit has been tampered with This warranty is automatic and no registration is required This warranty gives you specific legal rights You may also have other rights which are particular to your state The following information is for your records Serial Numbers______________________________ Purchase Date_________...

Page 12: ...4 07 THIEL 1026 Nandino Boulevard Lexington Kentucky 40511 1207 Telephone 859 254 9427 E mail mail thielaudio com Web www thielaudio com 04 07 ...

Page 13: ...U WLJKWHQ 8VLQJ WZR RI WKH LQFOXGHG EROWV WR VHFXUH LW PRXQW D VKRUW VWUXW WR WKH UHDU RI WKH VSHDNHU ZLWK the ends curving backward and the recesses at the ends pointing downward Remove the locknuts from the feet and store them Thread the feet completely through the threaded holes in the outrigger struts from the bottom Install the caps over the exposed threads on the top of the struts LWK WKH VS...

Page 14: ...s only information specific to the CS3 7 speaker system It is intended to supplement the general technical information paper which explains our engineering philosophy goals and techniques This advance copy contains only technical information about the unique midrange driver used in the CS3 7 PRELIMINARY ...

Page 15: ... residual effects of the diaphragm resonances that do exist And therefore to achieve even better performance requires further improvement in diaphragm behavior An Additional Problem There is an additional problem concerning the midrange driver that we wish to address This second problem exists only as a by product of solving another problem this type of situation is not uncommon in loudspeaker des...

Page 16: ...evious graph there is very little difference Compared to the graph of the response in a normal midrange the large improvement is obvious Other Details There are of course many other elements to a driver than its diaphragm Even with the two problems we have discussed solved there are other design elements that are required to provide clean dynamic and clear reproduction In order to provide very cle...

Page 17: ...THIEL CS3 7 midrange driver with coincidently mounted tweeter actual size THIEL 1026 Nandino Boulevard Lexington Kentucky 40511 USA www thielaudio com 12 05 ...

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