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Thiel CS1.5, Technical Information

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

Telephone: 859-254-9427 • Fax: 859-254-0075 • E-mail: [email protected]

Web: www.thielaudio.com

                              5/00

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.

Summary of Contents for CS1.5

Page 1: ...EL 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 ...

Page 2: ...L 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 Another advantage of dynamic drivers is that their small size allows the multiple drivers to be arranged in one vertical line This alignment avoids ...

Page 3: ...ion more than 1 dB is confined to only a narrow frequency range and therefore will have less effect on the perceived balance Achieving these goals requires the use of drivers with very uniform responses drivers with high consistency so that few units need be rejected reduction of usual cabinet diffraction which causes response errors and an unusual degree of compensation of driver response anomali...

Page 4: ...ependable 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 brain interprets real life sounds by using timing information to locate the position of a sound The ear perceives a natural sound as coming from the left mainly because the left ear hears it first That it...

Page 5: ...combine to produce the input step signal well but instead greatly alter the waveform The third graph shows how in a first order crossover system the outputs of the two drivers combine to reproduce the input waveform without alteration In practice the proper execution of a first order system requires very high quality wide bandwidth drivers and that the impedance and response variations of the driv...

Page 6: ...l 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 Both are used in zobel networks to correct the drivers impedance and are bypassed with high quality polypropylene types to prov...

Page 7: ... inductance does not change with the diaphragm position In addition the problem is further reduced by the copper sleeve which reduces the inductance of the coil to a fraction of its normal value by acting as a shorted turn of a transformer secondary winding Short coil advantages In summary the short coil long gap magnet system used in the CS1 5 provides several important advantages First it provid...

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