Abstract
Loudspeakers used in high-power applications are stressed by mechanical and thermal load. Both can be the reason for damage and should be controlled. Whereas the mechanical situation can be derived from the input voltage and the total impedance, which can be measured easily, it is rather difficult to calculate for the actual voice coil (VC) temperature under working conditions. It is possible to derive the VC temperature from the input voltage using linear mathematics if the thermal equivalent circuitry of the loudspeaker including the cabinet is known. Former papers have discussed the thermal equivalent circuitry of the loudspeaker without taking the cabinet into account. In the presented paper an equivalent circuit is presented, which can be used for loudspeakers in different cabinets and a measuring method is shown, that enables long-term measurements on loudspeaker systems with constant input power using a PC-based regulator. The main problem is to calculate the voice coil temperature from the measured impedance data. The solution of this problem is presented. At least the thermal parameters of the equivalent circuit are calculated from the measured data using curve fitting. Different loudspeakers and setups have been tested. The results will be presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
