D-fend™ is the industry's first all-digital, programmable loudspeaker protection and attenuation circuit designed to solve the age-old problems associated with protecting loudspeakers from excessive power conditions. D-fend™ has eliminated the headaches for speaker engineers – no more hassling with polyswitches, blown lamp filaments, lossy resistors, or slow relays. Incorporating such features as digital signal processing with on-board digital filtering, customizable microprocessor and MOSFET construction, the D-fend™ protection circuit enables a designer to use this technology prior to passive filtration and allows different sensitivity settings in specific frequency bands, such as woofer over-excursion bands or high frequency peak damage regions.
A patented technology of Evenstar™, D-fend™ allows maximum driver performance while ensuring damage-free operation. Continuing in the successful evolution of their electronic technology, Evenstar™ has pushed the limits of modern technology and achieved unparalleled performance in speaker protection with the implementation of the unique features listed below.
Model #: sa300
*Warranty: Full manufacturer's warranty applies.
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