David B. Weems is an acknowledged expert in speaker systems and speaker enclosures. He has written several books, including all four editions of Designing, Building, and Testing Your Own Speaker Systems--with Projects and the first edition of this volume. Weems also has contributed numerous articles on speaker systems to such widely read electronics publications as Audio, High Fidelity, Popular Electronics, Radio Electronics, and Speaker Builder. G. R. Koonce is a member of the Audio Engineering Society and contributes many articles to Speaker Builder magazine.