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A Compression Driver Flat From 10 kHz - 20 kHz

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snowflake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2017 at 10:50am
Originally posted by _djk_ _djk_ wrote:

The PRV is a Selenium D 220TI copy, on a 40° conical horn (laser beam in the top octave).

Nice driver though, just picked up four at PE for $140 (shipped).




looks exponential not conical or event tractrix:

http://prvaudio.com/wp-content/uploads/2015/05/WG14-25_Datasheet.pdf
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doller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doller Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2017 at 12:00pm
That is the same as the selenium hl 14 25.( as you all know) Really it sounds gash. outside you can get away with it.About. But it has no uhf atall. What does come out is so compressed it's hard work to listen too. Made in mexico.
I just should point out that here we have no real options. No 18 sound or beymer anything good needs importing.
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snowflake View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote snowflake Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2017 at 5:57pm
Originally posted by doller doller wrote:

That is the same as the selenium hl 14 25.( as you all know) Really it sounds gash. outside you can get away with it.About. But it has no uhf atall. What does come out is so compressed it's hard work to listen too. Made in mexico.
I just should point out that here we have no real options. No 18 sound or beymer anything good needs importing.


Imagine you will get loads of throat distortion at any sort of volume. table in Olson says a 600Hz 1" horn will produce 10% distortion playing a 1W 12kHz signal. exponential horns are objectively pretty useless for sound reinforcement but a surprising number of people are used to this terrible sound and just interpret it as what things sound like when loud.
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_djk_ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 12 August 2017 at 10:38pm
"looks exponential not conical or event tractrix"

Technically it is an axis-symmetrical exponential horn.

(it was easier to call it a conical)
djk
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doller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doller Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2017 at 2:30pm
My home made one next to the selrnium. should i be calling it a symetrical axis expo? I just know it sounds far better. Need to work on the mouth in the mk3 version. this is mk2. lots more sanding to do.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote _djk_ Quote  Post ReplyReply Direct Link To This Post Posted: 13 August 2017 at 10:49pm
Is the side wall curved, or straight?

Conical would be straight.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doller Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2017 at 9:06am
curved. so i guess expo. My mistake. always learning. thanks djk.
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Elliot Thompson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 14 August 2017 at 5:49pm
Originally posted by doller doller wrote:

That is the same as the selenium hl 14 25.( as you all know) Really it sounds gash. outside you can get away with it.About. But it has no uhf atall. What does come out is so compressed it's hard work to listen too. Made in mexico.
I just should point out that here we have no real options. No 18 sound or beymer anything good needs importing.


That horn loses all its UHF once mounted on a baffle. And of course, the Compression Driver plays a factor. Here is the same horn using a low grade compression driver not attached to a baffle.



Best Regards,


Edited by Elliot Thompson - 14 August 2017 at 5:52pm
Elliot Thompson
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