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→Compression driver protection: Added a question to an ambiguous statement: the high frequency drivers are protected [from damage to the compression diaphragm?] |
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==Compression driver protection==
In some [[Sound reinforcement system|sound reinforcement]] and [[studio monitor]]s the high frequency drivers are protected [from damage?] by current sensing self-resetting circuit breakers. When too much power is dissipated by the driver, the circuit breaker interrupts the flow of electric current. The circuit breaker resets itself after a brief interval. An older circuit protection technique used by [[Electro-Voice]], [[Community Professional Loudspeakers|Community]], [[UREI]], [[Cerwin Vega]] and others is a light bulb placed in series with the driver to act as a variable resistor. The resistance of the bulb filament is proportional to its temperature which increases as current flow through the filament increases. The net effect is that as the power increases the filament consumes an increasing share of the total power thus limiting the power available to the compression driver.<ref>{{cite web |url=http://www.audioxpress.com/magsdirx/voxcoil/addenda/media/seaandland.pdf |title=Sea & Land's Speaker Protection Devices |accessdate=2009-01-17 |url-status=dead |archiveurl=https://web.archive.org/web/20090407131736/http://www.audioxpress.com/magsdirx/voxcoil/addenda/media/seaandland.pdf |archivedate=2009-04-07 }}{{dead link|date=January 2024}}</ref><ref>{{cite web |url=http://www.patentstorm.us/patents/6201680/description.html |title=Adjustable high-speed audio transducer protection circuit - US Patent 6201680 Description |website=PatentStorm |accessdate=2009-01-17 |url-status=dead |archiveurl=https://web.archive.org/web/20090216174010/http://www.patentstorm.us/patents/6201680/description.html |archivedate=2009-02-16 }}</ref>
==References==
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