主题：宝岛寻书记-- 购得《Speaker Building 201》

Speaker Building 201 is a full, sequential explanation of the physics on which the loudspeaker is based, starting with magnetism and its discoverer. All the breakthroughs, step by step, which made the loudspeaker possible are deftly detailed. Along with this, Ray Alden conducts a wonderfully simple, understandable approach to the math involved, still explaining and demonstrating simply as he goes along. He shows the reader how to do the math and why it is important. His formulas are explained for use with a scientific calculator-with completely worked-out examples. Alternate methods using professional software or free calculators found on the Internet are also shown.

Subtitled "With 11 Completely Designed Speaker Systems," this book will be a godsend to the neophyte who really wants to learn how to design speaker systems. Further, the author has had substantial participation by several firms who have supplied data on drivers and components, plus designs for complete speaker systems. The final chapters of the book offer full plans for eleven loudspeaker projects, five of which were measured by Joseph D'Appolito in prototype form.