Self, Douglas. <br/><br/>
The design of active crossovers / 
Douglas Self. 
 - Waltham, MA :  Focal Press/Elsevier,  2011. 
 - xxiii, 579 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780240817385  RM217.54 0240817389 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters, Active--Design and construction.