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The Cynosure

Cynosure
Design Goals
Driver Selection
Enclosure Design
Enclosure Assembly
Crossover Design
Conclusion
Parts List
About the Designer
- Enclosure Design -

When it comes to getting the most out of small drivers, using a vented alignment is generally the best bet if enclosure size is not an issue. This is especially true in a home theater environment where low frequency signals can be eliminated in the digital domain. By filtering the signal from below the tuning frequency of a ported design, we can get the best of both worlds; i.e. greater bass extension without unloading at low frequencies.

Based on the driver parameters, the required cabinet volume for venting six W3-926S drivers is about .5 cu. ft. For my design, this translated into a 4" tall, 24" wide, and 14" deep cabinet constructed of 1/2" MDF. While 24" wide is about the minimum to fi t the drivers on the front baffl e, the dimensions can certainly be adjusted depending on the size of the television. If I had a large TV, I would probably consider making the front baffl e wider and putting the ports on the front Instead of the sides. This design calls for four 1-3/4" x 4" ports for a tuning frequency of roughly 100 Hz. While this size and number of ports seems like overkill for such small drivers, the ports do start to move substantial amounts of air at high power.

Diagram #1

 

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