In Reply to: The iron core has to go. posted by Edp on September 16, 2024 at 07:55:50:
...And the lower system sensitivity was not the main determination for going with the laminate woofer inductor.
In this case, I was tasked to only design the crossover. The drivers, enclosure volume and type of enclosure (passive radiator) were already determined and built. I did model the enclosure and found it was appropriate for the driver but the driver requires a very small enclosure which limited the available volume/space for the crossover.
In addition, the DCR of the woofer inductor needed to be as low as possible in this design. Utilizing an air core was an issue on two fronts:
-Increasing the DCR would also cause a higher Qt, which would have required building a new larger enclosure.
-Using an air core with a DCR that came closer to the laminate inductor DCR would have required a foil inductor of approximately 4" in diameter by 2" tall, and a non-starter for the available space and volume of the existing enclosure. In my opinion, this made the laminate inductor the best choice for this design.
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Follow Ups
- RE: The iron core has to go. - Curt C 16:31:50 09/18/24 (1)
- No worries, Doubt you first to make trade offs - Edp 21:23:54 09/18/24 (0)