hi oliver
i see what you mean.
jbells design rols of verry quick,but it seems to sound nice(thats what counts right)
if i open up the throat a bit more to say 170 it wil loose a few db on the high end and gain some in the low end.
but it seems to be a more relaxing sound.
ive bild several mid horns with a 1,5 to 2 :1 cr,but they only been used up to 500hz.
not bild a mid that runs to and above 1khz,hence the high cr.
what you think?
i see what you mean.
jbells design rols of verry quick,but it seems to sound nice(thats what counts right)
if i open up the throat a bit more to say 170 it wil loose a few db on the high end and gain some in the low end.
but it seems to be a more relaxing sound.
ive bild several mid horns with a 1,5 to 2 :1 cr,but they only been used up to 500hz.
not bild a mid that runs to and above 1khz,hence the high cr.
what you think?
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I have a question. Does it make sense to run the bass 35-90hz, midbass 90-200hz, midhigh150-1khz.is it a good idea or bad idea
i would say yes,but the downside is you need more amps,spaekers and you need more space.
more complex to setup and "tune"
for a simple setup like this,there is noting wrong with a tree way system.
they can sound real nice,and keeps $$ in your pocket.
edit/
more complex to setup and "tune"
for a simple setup like this,there is noting wrong with a tree way system.
they can sound real nice,and keeps $$ in your pocket.
edit/
no disrespect, but compared to the systems i work with🙂
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Hi epa,
My only attempts at building front loaded horns with regular cone drivers have been with a throat area between 0.5xSd to 0.7xSd. Nothing close to 5.4:1.
I'll attach a Hornresp input screen that shows what I came up with for the Beta-12A-2 around your idea. I just don't have any experience in trying to increase the throat compression ratio beyond 0.5xSd.
Obviously, drivers do get loaded a lot harder in tapped horns and front loaded bass horns, so your idea may very well work. It sure would be nice if one of the guys that have actually build this kind of horn would chime in here with their practical experience.
One of the reasons this interests me is that I have a few Selenium 10PW3-SLF on the shelf that I wanted to use in a similar application.
Regards,
My only attempts at building front loaded horns with regular cone drivers have been with a throat area between 0.5xSd to 0.7xSd. Nothing close to 5.4:1.
I'll attach a Hornresp input screen that shows what I came up with for the Beta-12A-2 around your idea. I just don't have any experience in trying to increase the throat compression ratio beyond 0.5xSd.
Obviously, drivers do get loaded a lot harder in tapped horns and front loaded bass horns, so your idea may very well work. It sure would be nice if one of the guys that have actually build this kind of horn would chime in here with their practical experience.
One of the reasons this interests me is that I have a few Selenium 10PW3-SLF on the shelf that I wanted to use in a similar application.
Regards,
Attachments
hi oliver
i have no douth the driver wil take the high cr,if its crossed @ 150 hz(it is cut off before the horn unloads and excursion go's up)
however the high cr might choke the driver a bit.
in your last sim the horn rols of quite steep upwards,nut sure if the selenium connects.
erik
i have no douth the driver wil take the high cr,if its crossed @ 150 hz(it is cut off before the horn unloads and excursion go's up)
however the high cr might choke the driver a bit.
in your last sim the horn rols of quite steep upwards,nut sure if the selenium connects.
erik
Hi epa,
Post #166: "...nut sure if the selenium connects."
Don't get what you're trying to say. With the Selenium 10P3 I was just looking for a "filler" between a woofer and a 2" horn, but it has nothing to do with this thread. I'll attach a simulation of the selenium in a horn with the 22"x22" front just for fun, it would be fine from 200Hz to 2kHz, I guess.
Regards,
Post #166: "...nut sure if the selenium connects."
Don't get what you're trying to say. With the Selenium 10P3 I was just looking for a "filler" between a woofer and a 2" horn, but it has nothing to do with this thread. I'll attach a simulation of the selenium in a horn with the 22"x22" front just for fun, it would be fine from 200Hz to 2kHz, I guess.
Regards,
Attachments
aha sry
i thought the selenium was the driver😱
the thing is this ,above the horn cut of you only get what the driver gives.
therefor if the horn fals of about 5db but the driver has a rising responce of 5 db(in the case of the beta 12)the end result wil be flat(isch).
when you fal of even more then a dip wil arise there.
btw (still under investigation)😀
i thought the selenium was the driver😱
the thing is this ,above the horn cut of you only get what the driver gives.
therefor if the horn fals of about 5db but the driver has a rising responce of 5 db(in the case of the beta 12)the end result wil be flat(isch).
when you fal of even more then a dip wil arise there.
btw (still under investigation)😀
aha sry
i thought the selenium was the driver😱
the thing is this ,above the horn cut of you only get what the driver gives.
therefor if the horn fals of about 5db but the driver has a rising responce of 5 db(in the case of the beta 12)the end result wil be flat(isch).
when you fal of even more then a dip wil arise there.
btw (still under investigation)😀
My baby. Lol
oliver i posted the issue in davids hr topic to hear some opinions,before whe dicide on cr.
grtz erik
grtz erik
Hi Nathenry,
Very often PA subwoofers will not have any damping material applied. You don't want to stuff a bass reflex box completely, that might interfer with the internal action of the box. Always keep the damping material away from the port entries.
Regards,
Very often PA subwoofers will not have any damping material applied. You don't want to stuff a bass reflex box completely, that might interfer with the internal action of the box. Always keep the damping material away from the port entries.
Regards,
which one of these picutres show the correct way to layout the bracings for this box.
if everything goes well the boxes will be finish tomorrow.
if everything goes well the boxes will be finish tomorrow.
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Hi Nathenry,
Post #175, picture 1 (1339806373497.jpg) looks OK to me, but the pictures are all so small, that I cannot really tell the difference. The braces (or cleats) belong into the corners between two boards.
Regards,
Post #175, picture 1 (1339806373497.jpg) looks OK to me, but the pictures are all so small, that I cannot really tell the difference. The braces (or cleats) belong into the corners between two boards.
Regards,
Bracing layout
Oliver
Which is the correct way to layout the bracings
Red triangular strip and black regular bracing
Oliver
Which is the correct way to layout the bracings
Red triangular strip and black regular bracing
Hi Nathenry,
Post #177:
Top picture: the red line is wrong, as it goes across the port, reducing the port opening. (It wouldn't reduce it enough to matter, but anyway.) The black lines look OK.
Bottom picture; that looks like the correct place for both types of bracing, the red one should go all the way to the left edge of the side board. The black line should be inside the rear and top panels.
The main purpose for this type of cleat (or batten) is to help in sealing the box (especially in the long run), they also provide some additional stiffness. You want to make sure that y'all remember the side-to-side and top-to-bottom and back bracing.
Regards,
Post #177:
Top picture: the red line is wrong, as it goes across the port, reducing the port opening. (It wouldn't reduce it enough to matter, but anyway.) The black lines look OK.
Bottom picture; that looks like the correct place for both types of bracing, the red one should go all the way to the left edge of the side board. The black line should be inside the rear and top panels.
The main purpose for this type of cleat (or batten) is to help in sealing the box (especially in the long run), they also provide some additional stiffness. You want to make sure that y'all remember the side-to-side and top-to-bottom and back bracing.
Regards,
Hi Nathenry,
It good to see you are making progress.
As the subject of a midrange horn build around a coned driver came up, and as I was going to use a Selenium 10PW3 in a different project, I designed it into a box that would fit with your woofer: 22"W x 22"H x 28"D. I'll attach the drawing (it's really just a sketch, and if you're going to play around with it, you'll have to work out the details as you go along), and I tried to make it about as easy to build as I can think of. The range is 200Hz to 2kHz. At least this will give you another alternative.
As jbell did in his version of the Beta-12-2 horn (start at Post #257 here: http://www.diyaudio.com/forums/subwoofers/170771-single-sheet-th-challenge-26.html - please, take note of his use of a passive crossover between the 12" and the compression horn) the front can be covered with a metal grill, and the horn and driver as mentioned in Post #151 can be mounted against the grill from the inside.
Regards,
It good to see you are making progress.
As the subject of a midrange horn build around a coned driver came up, and as I was going to use a Selenium 10PW3 in a different project, I designed it into a box that would fit with your woofer: 22"W x 22"H x 28"D. I'll attach the drawing (it's really just a sketch, and if you're going to play around with it, you'll have to work out the details as you go along), and I tried to make it about as easy to build as I can think of. The range is 200Hz to 2kHz. At least this will give you another alternative.
As jbell did in his version of the Beta-12-2 horn (start at Post #257 here: http://www.diyaudio.com/forums/subwoofers/170771-single-sheet-th-challenge-26.html - please, take note of his use of a passive crossover between the 12" and the compression horn) the front can be covered with a metal grill, and the horn and driver as mentioned in Post #151 can be mounted against the grill from the inside.
Regards,
Attachments
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