. Elements of acoustical engineering. Electro-acoustics; Sound. MULTIPLE LOUD SPEAKER 119 The above discussion, together with Figs. , , and , shows that to obtain adequate power handhng capacity and uniform response over a wide range (greater than 70 to 5000 cycles) requires a relatively large diameter and heavy diaphragm and large coil at the lower frequencies and a relatively light weight vibrating system at the higher frequencies. There are a large number of direct radiator loud speaker systems which may be built to satisfy these conditions. It is the purpose of the sections wh
. Elements of acoustical engineering. Electro-acoustics; Sound. MULTIPLE LOUD SPEAKER 119 The above discussion, together with Figs. , , and , shows that to obtain adequate power handhng capacity and uniform response over a wide range (greater than 70 to 5000 cycles) requires a relatively large diameter and heavy diaphragm and large coil at the lower frequencies and a relatively light weight vibrating system at the higher frequencies. There are a large number of direct radiator loud speaker systems which may be built to satisfy these conditions. It is the purpose of the sections which follow to consider a number of these systems. Multiple Single Cone, Single Coil Loud Speaker. — The character- istics of Fig. show that the low frequency efficiency may be maintained to the higher frequency ranges by employing a small and relatively light cone and coil. On the other hand, to obtain adequate power handling capacity at the lower frequencies with tolerable excursions of the vibrat- ing system requires a cone of relatively large area. To insure operation below the elastic limits of the materials a cone of large area must be of a sturdy construction. As shown in Fig. and by equation a large. FRONT VIEW AMPLIFIER A SIDE VIEW. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Olson, Harry Ferdinand, 1901-. New York, D. Van Nostrand company, inc.
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