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build quality of porn horns

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davey t View Drop Down
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    Posted: 17 October 2005 at 6:31pm

Building 4 porns horns at the mo. Having to make a few mods to make the cabs thin enough to match labs. One thing i have noticed  is the questionable build quality of the porn horn mids. The side edges have varying thickness and are not always straight meaning  my reccessed slots have to be too big/wide. Also the back hole/mount varys from one to annother meaning i have to match baffle pieces to the horn. Little problems but i was expecting slightly higher quality for the price.

anyone else found this?

Also, i'm using the selenium HL14-50 instead. Smaller horn so may give slightly higher hf? I'l let you know how it sounds.



Edited by davey t
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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2005 at 5:11am

Hello

That is why i did it like this:

http://www.speakerplans.com/forum/forum_posts.asp?TID=2397&a mp;a mp;a mp;a mp;PN=1

I also had to shape the side edges but it was easy as you can take several mms off by just using a sandpaper.

Making the boxes was really time consuming because every box had to be matched to it's midhorn.

PS. sometimes i hope my english vocabulary would be better. it would be so much easier to explain things...

 



Edited by Vivo - 20 October 2005 at 2:38am
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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2005 at 5:32am
Why didn't you place the baffle between the horn and the phase bung piece? thats what i plane to do. That way you don't affect the front chamber volume so much.
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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 18 October 2005 at 5:44am

Are you sure you mean front chamber?

I think that the way i have done it just makes the rear chamber smaller and Rog said it should be as small as possible.

http://www.speakerplans.com/forum/forum_posts.asp?TID=641



Edited by Vivo
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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2005 at 6:16pm

yea yea, i get you.

Kinda fuct up mine. Story is, i wanted the cab to be the same width as my labs, so i thought "i know, i'l just recess 3mm round so the cab slots round the front of the porn horn"

wrong

the poor ass build quality of the horn means that the sides bow, aren't straight and have varying thickness. Unfortunately, i have been rushing and saw all this too late. bollox to it, i'l just have to use lots of filler etc.

Other thing abut this way is that the speaker has to be rear loaded. To do this I went speaker, phase bung, 8mm of wood then horn. Seems fine, i don't think it will effect the horn at all.

To be honest, i am totally dissapointed with the build quality of them. I have worked with turbo 10" horns and other horns so i know its possible to get it perfect. Why are the porns so dodgy?

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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 19 October 2005 at 8:24pm

daveyt ....Why are the porns so dodgy?

because the people that buy them trade keep trying to knock the price down and there for the build quality goes down too

there is know way near enough glass in those horns the walls are way too thin,

 stop skimping boys and build some good stuff please

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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2005 at 2:11am
Originally posted by mykey mykey wrote:

 

there is know way near enough glass in those horns the walls are way too thin,

 

The walls are about 1cm thick... That really is enough.



Edited by Vivo - 20 October 2005 at 2:19am
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mykey View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2005 at 7:48am

you must have bought some really good show models then!

because the ones i have checked out are about 4mm

1cm thick they would weigh to much think you got that wrong

you better get down to spec savers mate

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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2005 at 10:09am

I haven't seen anyone elses pornhorns but mine really are atleast 1 cm thick or more.

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Dom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dom Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2005 at 4:40pm

Originally posted by davey t davey t wrote:

Also, i'm using the selenium HL14-50 instead. Smaller horn so may give slightly higher hf? I'l let you know how it sounds.

I've got some comparison plots of the HL14-50 vs the porn top horn, both with the SD740N which I can upload if you're interested...

"It sounded like a million fire engines chasing ten million ambulances through a war zone and it was played at a volume that made the empty chair beside me bleed."
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davey t View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote davey t Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2005 at 5:40am
yes please mate. Which turns out better?
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Dom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dom Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2005 at 2:21pm

 

They are pretty similar sounding to be honest and the plots are pretty identical until you get to around 14-15k when the porn horn drops off whereas the selenium horn gets to around 16.5khz.

The plots might look pretty peaky but the vertical axis is quite small

"It sounded like a million fire engines chasing ten million ambulances through a war zone and it was played at a volume that made the empty chair beside me bleed."
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