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Planar Wave horn

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Mircea Bartic View Drop Down
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    Posted: 12 March 2006 at 4:57am
It looks like I'll have some new toys for a few days

I have a custom order for some really powerfull subs

Planar wave horn plan


the sub used will be Selenium 18SW1P
http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7& Partnumber=264-438&ctab=10


Edited by Nexus_3 - 01 April 2006 at 3:01pm
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 12 March 2006 at 4:58am
I'll post some pics as I'll build them next week
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tb_mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 12 March 2006 at 5:25am
Planar horn bass reflex?

18" on BR,decent anyway.
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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 12 March 2006 at 5:40am
it's a design derived from dynacord Planar wave horn subs

the port ending outside the waveguide helps achieve better subbass reproduction

horn coupling is not necesary
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tb_mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 12 March 2006 at 8:58pm
Ah yes i remember that sub now. When you do make some,could you measure its impedence vs frequency etc? Im interested in how that short tunnel helps it at all.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote freddyi Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2006 at 2:28pm
COOL horn expansion rate  - PV Low Rider (if meet spec) look like a drop-in substitute for US cheapass.  Are PV Low Rider 18 OK?  -- I've 1808 and they are way off specification so are now "open baffle woofer"


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Mircea Bartic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mircea Bartic Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2006 at 2:54pm
one way of testing if other speakers work in the design is this one:

because there is no speaker simulation program capable to polt this design we have to work around that.

1. plot this speaker in bass box as a simple bassreflex box (no horn)
2. load another driver in that enclosure and try to reach the same plot
3. when you have identical plots then it should work ok in the planar horn.

modifications to the reflex ports will be necesary

I know that P-audio c18-650EL works in this design , but you have to shorten the ports by 110 milimeters


Edited by Nexus_3 - 13 March 2006 at 2:56pm
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tb_mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2006 at 7:19pm
Originally posted by freddyi freddyi wrote:

COOL horn expansion rate  - PV Low
Rider (if meet spec) look like a drop-in substitute for US
cheapass.  Are PV Low Rider 18 OK?  -- I've 1808 and they are
way off specification so are now "open baffle woofer"




Freddy - Easier to make a K?
Whatabout d&B B2 patent? I want to try it,measure impedence etc,even if it just makes a nice 45hz !
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Post Options Post Options   Thanks (0) Thanks(0)   Quote djstefanos Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2006 at 10:28pm

does anyone know where i can get the full plan of the sub above? Those are really easy to make. Just move the baffle half way....

I have heard those (dynacords) in stacks of 6 per side during an outdoor concert in a square. Rattled my glass of wine in the bar i was in.



Edited by djstefanos - 13 March 2006 at 10:34pm
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james folkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote james folkes Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2006 at 5:44am
probably a silly question, but i'm assuming to load the driver you shimmy it
past the mouth brace and then climb half in side the cab to bolt it in?
pictures would indeed be nice, plots would be nicer.

james.
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Mark James View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 14 March 2006 at 8:14am
are they actualy that simple/good? im interested in finding out more!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Moller Quote  Post ReplyReply Direct Link To This Post Posted: 15 March 2006 at 5:11pm

Originally posted by Nexus_3 Nexus_3 wrote:

It looks like I'll have some new toys for a few days

I have a custom order for some really powerfull subs




the sub used will be Selenium 18SW1P
http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7& Partnumber=264-438&ctab=10

 

2 questions:

Can you explain the hornloading part of this box?.. In other words: How do I do the math to design that horn?... Are we talking Helmholz resonators or ?

Why does the handles on your drawing say "Cobra PWH" :-)... Did you measure a PWH sub or are you just using the outside dimensions and retuning it to suit the Selenium driver?

/peter

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