3517 RALEIGH AVENUE,   ST. LOUIS PARK, MN  55416
952/926-8198
HOURS
Wednesday – Saturday 10am - 5pm
Closed Sunday - Tuesday and holidays
ADMISSION
Adults $7
Students $5
 
 
 

Al Lein's Loudspeaker Impedance Tester


From Howard Tremaine’s Audio Cyclopedia, “As a rule, the impedance characteristics of a loudspeaker are measured in the enclosure used with the system.” Tremaine also recommends using a “400 cps signal” to test full-range speakers.

To make the dial scale, Al taped paper around the pot and marked it with pencil.