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Bandpass Enclosure Patents (4th, series 6th, parallel 6th, etc). TECHNICAL READS


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I was reading up on 6th order bandpass boxes and I ran across some patents.  I found a lot of interesting design information in these patents, but no calculations.  Whats the point you ask?  To understand better how bandpass boxes function.  Knowledge is power.

Most of the patents have a lot of blah blah blah near the beginning of each patent since justifying the patent is first and foremost.  Somewhere past halfway, each patent lists some design tips, tricks, rules, etc that are great and thats where the interesting portions begin.

I recommend to have the attached pictures (at the beginning of the patent) opened on a second screen so that you can quickly reference the numbers identifying each component and its importance in each system.

4th order: https://www.google.com/patents/US2689016

Parallel tuned 6th order (Bose): https://www.google.com/patents/US4549631

Series tuned 6th order: https://www.google.com/patents/US4875546

Series and parallel-series tuned Nth order (8th and higher): https://www.google.com/patents/US7103193 

Helmholtz Resonance, the concept that drives ported enclosures and all 4th, 6th, etc enclosures: https://en.wikipedia.org/wiki/Helmholtz_resonance

I've been reading through these for a few days now trying to understand whats going on with these more complicated arrangements and I think some of you will benefit from the information in these patents.  Enjoy.

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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