The CS3.7 tweeter provides much lower distortion and higher output than any other tweeter we are aware of. This is accomplished in spite of a size small enough to mount coincidently with the midrange driver by a unique long gap motor system that uses a set of four radial and one axial neodymium magnets with a total weight six times that of a typical neodymium powered tweeter.
|
|
In addition, the tweeter provides the complete absence of any coloration-producing diaphragm resonances in the audible range, a very wide operating bandwidth and very low power compression. The result is high frequencies of utter neutrality and effortless dynamics.
A set of four radially- and one axially- magnetized neodymium magnets (shown right) have a total weight of 64 grams (2.3 oz), six times usual.
The midrange driver should precisely reproduce every musical nuance while introducing not even a trace of its own colorations or distortions caused by diaphragm resonances or electromagnetic nonlinearity. The most exciting innovation in the CS3.7 is a new midrange diaphragm that advances midrange performance much closer to this ideal.
The midrange driver's diaphragm is constructed with an entirely new shape that provides far greater stiffness than typical diaphragms, even those made from exotic materials. The diaphragm is shaped with corrugations that are oriented from the center outward (like spokes) and act a little like small I-beams to provide enormous strength in that direction. The large diameter voice coil attached to the diaphragm gives it strength in the other direction--around the circle. This design achieves such great stiffness that the diaphragm continues to vibrate perfectly, as one unit, all the way up to 20 kHz, usually considered the upper limit of human hearing. Such fabulous vibrational behavior is unprecedented and allows the CS3.7 to achieve a purity and delicacy of the high frequencies that is extraordinary.
This new diaphragm geometry also has a second important benefit that derives from its shape. The diaphragm is basically flat and therefore has virtually no detrimental effect on the tweeter’s output, unlike a normal cone shaped diaphragm that alters the sound of a tweeter mounted in its center.
The woofer also utilizes an innovative diaphragm that is basically flat and therefore reduces the diffraction of the midrange energy usually caused by the woofer’s conical cavity. The massive magnet powers a very high output and low distortion long magnetic gap and distortion is further reduced by the use of a heavy copper pole ring and a copper pole sleeve that reduces inductance nonlinearity. The large 3" diameter voice coil allows high power handling.
The very low frequencies are augmented by a passive bass radiator diaphragm which avoids the resonance and noise problems of a ported enclosure.
10” with wave-shaped aluminum diaphragm, 3” diameter voice coil, 5 lb magnet in a 13 lb structure, copper pole ring, copper pole sleeve, short coil/ long gap design with 14 mm Xmax, die-cast chassis
4.5” with wave-shaped aluminum diaphragm, 3” diameter voice coil, 115 g (4 oz) neodymium magnet, copper pole sleeve, short coil/ long gap design with 6 mm Xmax, die-cast chassis
1” aluminum dome, 64 g (2.3 oz) neodymium magnets, copper pole sleeve, short coil/ log gap design with 3 mm Xmax, coincidently mounted with midrange
10” wave-shaped diaphragm
BANDWIDTH (-3DB) 32 Hz - 35 kHz
33 Hz - 26 kHz ±2 dB
minimum ±10°
90 dB
4 ohms (2.8 ohms minimum)
100-600 watts
12.5 x 21 x 45 in /32 x 53 x 114 cm
91 lb 41.5 kg
|
