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Technical Information
THIEL CS1.5
Coherent Source
Loudspeaker
This paper describes some of the technical performance aspects, design
considerations and features of the THIEL model CS1.5 loudspeaker system.
It is intended to supply information for those who are interested in such
matters. It is not intended to imply that good measured technical
performance is sufficient to guarantee good sonic performance.
THIEL • 1026 Nandino Boulevard • Lexington, Kentucky 40511 • USA
Telephone: 859-254-9427 • Fax: 859-254-0075 • E-mail: mail@thielaudio.com
Web: www.thielaudio.com
®
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Related Manuals for Thiel CS1.5
Summary of Contents for Thiel CS1.5
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Page 1: Technical Information
Loudspeaker This paper describes some of the technical performance aspects, design considerations and features of the THIEL model CS1.5 loudspeaker system. It is intended to supply information for those who are interested in such matters. It is not intended to imply that good measured technical performance is sufficient to guarantee good sonic performance. - Page 2 These properties include wide area radiation and the absence of out-of-phase energy. To meet these requirements all THIEL speakers employ dynamic drivers. Dynamic drivers have the advantages of providing a point source radiation pattern with good dispersion of sound over a wide area, great dynamic capability, good bass capability and a lack of rearward out-of-phase energy.
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Page 3: Frequency Response
Our design goal was to achieve accuracy in the design prototype of 2 dB with a production tolerance of 1 dB. The result is a tolerance in every production speaker of 3 dB and a tolerance from speaker to speaker of 2 dB at all frequencies. -
Page 4: Time Response
One problem caused by different arrival times from each driver is that the only dependable locational clue is the relative loudness of each speaker which causes the sound stage to exist only between the speakers. In contrast to this loudness type of imaging information, the ear–... -
Page 5: Phase Response
There is a type of crossover system that does not introduce any phase shift or time smear, although it is difficult and expensive to execute. This crossover is the first order (6dB/octave) system that THIEL has employed since 1978 in all Coherent Source systems. A first order system is the only type that can achieve perfect phase coherence, no time smear, uniform frequency response, and uniform power response. -
Page 6: Energy Storage
The usual type of capacitor for speakers is electrolytic. This type has the advantage of very low cost but also causes audible distortion due to dielectric absorption and other mechanisms. There are only two electrolytics used in the CS1.5 and neither of these is in the signal path. - Page 7 Short coil advantages In summary, the short coil/long gap magnet system used in the CS1.5 provides several important advantages. First, it provides extremely low distortion, both harmonic and intermodulation. This is especially important in two-way systems where intermodulation of the upper midrange by the bass is possible.