What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Hitachi HS-330

 Hitachi has created the metal Cone Speaker because we believe it is superior  to speakers made with paper cones. Paper cones are fine but they have a tendency to respond partially and not "whole-heartedly" to a signal coming from the amplifier.
In other words, as the voice coil pushes or pulls at the cone center, part of the cones respond correctly while other parts don't.

 What is needed is something piston movement. A material with free circumferential elongation and contraction.  The result of extensive research into all possible (and sometimes impossible) cone materials. Hitachi's engineers created the Metal Cone with perfect low resonance characteristics.
Light,rigid, it also possesses a "gathered edge" supporting the metal cone firmly without disturbing piston movement.  Altogether producing far less distortions than conventinal paper cones.
It responds "wholeheartedly" and not partially giving your music full power of expression.
You might even say it gives your music an edge.
 Paper has always been the traditional material for even the finest speaker systems. Unfortunately, a paper cone doesn't move evenly over its entire surface, which results in uneven frequency and transient response - or "breakup distortion".
So Hitachi engineers overcame that problem by using metal cone diaphragms for the woofer, mid-range and tweeter combined with a peak control circuit which eliminates any possibility of cone resonance affecting sound quality.
 Then, a patented Gathered Edge suspension design was applied to the woofer which prevents lateral vibrations causing distortion, while at the same time, allowing a greater dynamic bass response.
We believe this unique pair of performers are the most exciting, lifelike, distortion-free speakers we've ever heard.  More important, we think you'll agree.
Specifications

HS 330
Type:  3-way, 3-speaker bookshelf type
Speakers:
Woofer L-253:  250 mm (10") Sandwiched Metal Cone Gathered Edge
Midrange M-65: 65 mm (2½") Metal Cone
Tweeter H-40:  40 mm (1½") Metal Cone
Max. Input (Peak):  100 Watts
Frequency Response:  40 - 18,000 Hz ±4 dB
Sensitivity:  82 dB (2,83 V/1m)
Crossover:  900 Hz;  3,500 Hz
Impedance:  6 Ω
Enclosure Volume:  40 l
Dimensions ( H x W x D):  575 x 315 x 305 mm

Weight:  13 kg

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