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My BassHorn VS Martin WSX

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Deadbeat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 2:33pm
Man says he's designed it around an 18sound.

Am interested to see a redesign - as it is there's a number of problems with the simulation as has been pointed out. Looks like an old version of hornresp as well.

Where did you find that WSX sim?
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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 3:14pm
And why he must calculate in 2pi?

As i understand calculating in 0,5pi is like getting a freq response for corner loading one box or for a cluster of 4 boxes. By my understanding one should always use at least 4 horns in a cluster to gain the full potential of the horn box (ie making a big enough mouth).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357 Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 3:34pm
Originally posted by biotec biotec wrote:

How about the RCF LF15N401?
 
Yes that does look like a "horny driver"...
 
Looks like it would stay in control, even if in fairly large chamber as well.
 
Seems a bit stiff though...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 3:57pm
Originally posted by MarjanM MarjanM wrote:

And why he must calculate in 2pi?

As i understand calculating in 0,5pi is like getting a freq response for corner loading one box or for a cluster of 4 boxes. By my understanding one should always use at least 4 horns in a cluster to gain the full potential of the horn box (ie making a big enough mouth).
because you'd be dissapointed
 
and people build one prototype and not 4
 
 
imagine testing 1 cab and not seeing the result you wanted to see or have seen on your 0.5 x pi graph
 
atleast in 2.0 x pi you can see the exact result and know that 4 will be even better
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 4:23pm
Mykey,

Anyone designing a horn box should be aware of that at the first place :-)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 4:29pm
then i don't understand your question?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 October 2008 at 7:15pm
Originally posted by MarjanM MarjanM wrote:

And why he must calculate in 2pi?

As i understand calculating in 0,5pi is like getting a freq response for corner loading one box or for a cluster of 4 boxes. By my understanding one should always use at least 4 horns in a cluster to gain the full potential of the horn box (ie making a big enough mouth).


0.5 pi is radiating out of an infinite granite corner basically.
1pi is radiating out of a wall-floor transition.
2pi is radiating out of an infinite baffle.

In a big enough stack (not 4 bins), the middle ones will be sort of radiating into 1pi.

It really depends on the scale - if you zoom out and out and out that same stack would really be simply radiating into an infinite baffle of the world. If you zoom out so the earth is tiny, the speaker would be in full space.

But you already knew all of that.

Hornresp has the ability to model multiple cabinets, the universal standard for modeling sub for pro sound is 2pi as you rarely get a place that allows you to radiate out of a corner. do remember that lots of material is basically invisible at the operating range.

The question of how many horn boxes to use is down to the design. The 1850 was designed to be used in stacks of 4 - if it was on hornresp I would design it looking at plots for 4 cabinets. PA is all about compromise with bass horns. Horn length and mouth area increases as you stack cabinets - but this is no substitution for radiation out of a corner - while they have similar effects of lowering apparent f3 etc, they aren't the same thing and shouldn't be confused. The 186 on the other hand was optimized for two bins.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2008 at 4:04am
RCF LF15N401 is very good driver for it! Thumbs Up

I redesigned new versions of my basshorn. Look at the page:
http://amanosempai.narod.ru/web/Doc2.htm

Theese versions much bigger.. Ouch
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2008 at 4:34am
my friend you really must upgrade your Hornresponse, you may also find that your charts may change
 
looking at the new drawing......you have a letter box throat right? letter box throat is fine if you have plenty of space in front of it, you don't have enough space
 
the strain on your driver would be immense, this gap is too small, the cone would be fighting against its self, instead of pushing air down the horn, I reckon, that the driver at full power, would destroy itself in less than 10 mins
 
you aslo need to put a piece of wood (stopper) at the front edge of the throat when using a letterbox design, to stop the sound from going the opposite way
 
Tommysb was bang on, look what he said last post 1st page
 


Edited by mykey - 07 October 2008 at 5:44am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2008 at 5:15am
Is meant that in throat for diffuser necessary to do deepenning..

http://amanosempai.narod.ru/web/Doc3.htm

The version 19.40 of Hornresp looks wrong.. It Calculates wrong SPL - Sound pressure does not correspond to power..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Amano Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2008 at 5:22am
For example... Calculating in Hornresp 19.40 of my basshorn with 2.83volts and 0.5xPI ANG:
http://amanosempai.narod.ru/web/Doc4.htm

I don't believe that it can give 113db 1w/1m from 50-300Hz! Confused

But displacement is the same as in older version of Hornresp..


Edited by Amano - 07 October 2008 at 5:28am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 07 October 2008 at 5:58am
the area in red is to small, this needs to be deeper, the blue marking should be a solid piece across the width of the cabinet
 

[URL=http://g.imageshack.us/img410/easycapture1dj4.png/1/][IMG]


Edited by mykey - 07 October 2008 at 5:59am
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