Dayton manual Using WT3 to Diagnose Loudspeaker Fault Conditions

Using WT3 to Diagnose Loudspeaker Fault Conditions

When carefully applied WT3 can be used to spot common problems with a speaker system. For example, the screen below shows two impedance measurements of the same two-way speaker system. The green (lower) plot shows the normal impedance response of this system. The purple (upper) plot shows the system with the tweeter in an open circuit fault condition. The missing tweeter load causes the impedance response to rise above 2 kHz suggesting that the tweeter has faulted to an "open circuit". If only the faulty system is available for testing it may be less apparent that there is a problem. But if a suspect speaker is compared to a good speaker the fault condition is easy to see.