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5th Order Bandpass |
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Ibex 
Young Croc 
Joined: 27 May 2009 Status: Offline Points: 1013 |
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 Posted: 29 September 2009 at 1:01pm |
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Maybe, thats the 5th order... they write:
Adding a restriction to the duct assembly outlet created a duct that would now resonate across a wider frequency band (like a vero-vent) and that improved power handling again.
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Jake_Fielder
Old Croc 
Joined: 08 October 2007 Status: Offline Points: 4231 |
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Posted: 30 September 2009 at 1:01am |
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You cant just make the port a funny shape and add another "order" on, read the thread i posted earlier
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Ibex
Young Croc
Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 30 September 2009 at 7:38am |
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I also thought so, cause only the effective port area to port length ratio is essential.
Would a variable or a few different port lenghts add another order?
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Naff_monk
Young Croc
Joined: 11 July 2009 Status: Offline Points: 500 |
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Posted: 30 September 2009 at 7:08pm |
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minaximal
Old Croc
Joined: 26 September 2004 Location: United Kingdom Status: Offline Points: 1780 |
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Posted: 30 September 2009 at 8:12pm |
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looks similar to a karlson coupler slot arangement, shame freddi doesn't post here anymore..
http://forum.speakerplans.com/k-bin-discussion_topic7452_page5.html?KW=karlson+coupler |
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godathunder
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Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1833 |
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Posted: 30 September 2009 at 8:13pm |
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tapering vents to excite a broader resonance; is that not the general concept of karlson cabs?
wheres freddyi when you need him?
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LOUDER THAN LOUD
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godathunder
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Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1833 |
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Posted: 30 September 2009 at 8:13pm |
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minaximal, thats a rather freaky coincidence
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LOUDER THAN LOUD
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opus
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Joined: 25 June 2007 Location: Worcester Park Status: Offline Points: 112 |
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Posted: 30 September 2009 at 8:37pm |
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Why?? What does this offer over more popular 4th and 6th order designs ???
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Unknown Enemy
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Joined: 03 October 2007 Location: Kent Status: Offline Points: 266 |
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Posted: 30 September 2009 at 8:43pm |
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Just interested in different designs and how they work.  Looking at new ways of trying things out. No harm in that surely? |
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minaximal
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Posted: 30 September 2009 at 9:31pm |
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ha! freddyi and his constant karlson pics, hehe |
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godathunder
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Joined: 19 July 2004 Location: wicklow Status: Offline Points: 1833 |
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Posted: 30 September 2009 at 10:10pm |
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I always appreciated that they were firing somewhere over my head.
freddy, please come explain; there is a chance that after half a decade of this site indoctrinating me I may finally understand
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LOUDER THAN LOUD
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Phattoo43725
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Joined: 02 August 2016 Status: Offline Points: 1 |
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Posted: 02 August 2016 at 6:19pm |
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I was reading the old post by you and wondered if you found any information on the box. I actually built one back in the late 80's early 90's for a friend that had moved from SC and showed me the plans.
It was built , with two chambers, for two 12 inch subs sharing 1.5 cuft of air space in the rear chamber. This chamber was also tapered to make a wedge. The front chamber was tune able with a slot port. The shorter the chamber the harder it hit within the bandwidth. In the time period running Megawattage was crazy talk, so it was ran on around 125 watts of clean power for both subs. It was a beast for that day I would assume that this could be replicated with modern subs that can be placed in a 4th order using the correct sealed air space figures and tuning the slotted portion to the space it is in. Please tell me if you pursue this and send pics. Thx, Phattoo
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Jake_Fielder wrote: