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THIEL • 1026 Nandino Boulevard • Lexington, Kentucky 40511 • USA

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Technical Information

THIEL CS3.6

Coherent Source

®

Loudspeaker

This paper describes some of the technical performance aspects, design
considerations and features of the THIEL model CS3.6 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.

Summary of Contents for Coherent Source CS3.6

Page 1: ...Loudspeaker This paper describes some of the technical performance aspects design considerations and features of the THIEL model CS3 6 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: ...g the distances from each driver to the listener to change with different listener positions The major potential disadvantages of dynamic speakers are diaphragm resonances cone break up time errors phase errors cabinet resonance and cabinet diffraction None of these problems is a fundamental limit and all can be minimized or eliminated by thorough and innovative engineering resulting in a speaker ...

Page 3: ...ies The CS3 6 mid driver uses a very effective new method of greatly reducing diaphragm resonance patent applied The diaphragm is constructed of two cones each with a different shape which are joined at the rim and at the neck with only air between them The resulting three dimensional structure is drastically stronger than a conventional diaphragm of equal weight This increased strength causes the...

Page 4: ...s To greatly reduce diffraction the CS3 6 employs a front baffle that is curved at the edges so energy radiated along the baffle can continue into the room without encountering abrupt cabinet edges Figures 9 and 10 illustrate the beneficial effects of the CS3 6 s curved baffle on the response of the tweeter Results The end result of greatly reducing diffraction and diaphragm resonances is a speake...

Page 5: ...results in the loss of spatial and transient information During the past decade the fourth order Linkwitz Riley crossover has risen in popularity and it is sometimes promoted as being phase coherent What is actually meant is that the two drivers are in phase with each other through the crossover region However neither driver is in phase with the input signal nor with the drivers output at other fr...

Page 6: ...motion with a viscous material so that the stored energy can be dissipated as heat instead of mechanical vibration which produces unwanted sound This method has limited benefit for two reasons First energy can only be dissipated as heat after there is unwanted mechanical vibration to convert Secondly even though some of the absorbed energy is transformed into heat it is still absorbed from the des...

Page 7: ... 6 woofer incorporates heavy copper rings around the center pole With these rings any changes in the magnet s strength induces an electrical current in the rings which generates a magnetic field that is opposed to and practically cancels the original change A second problem is that the field strength is not symmetrical in front of and behind the gap but is stronger behind the gap than in front of ...

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