Ok, i know how to build power amp but not horn boxes, or powerfull sub boxes, even if i did so in the early 90's for cars (bandpass and ported only).
The deal is, i have 1 big power amp (1200w) and a 12 inch speaker capable of 3000w peak supposedely.
I want to make a semi horn box that will fill up a 20hz-100hz range or so for home theater with a lot of output (freq range may change).
I would like to make something like pictured. I dowloaded the hornresp programm but am totaly lost at to where to start entering parameters.
I have all the parameters of the sub itself. Please dont fire me if it sounds simple and stupid...let me know where i can start.
The deal is, i have 1 big power amp (1200w) and a 12 inch speaker capable of 3000w peak supposedely.
I want to make a semi horn box that will fill up a 20hz-100hz range or so for home theater with a lot of output (freq range may change).
I would like to make something like pictured. I dowloaded the hornresp programm but am totaly lost at to where to start entering parameters.
I have all the parameters of the sub itself. Please dont fire me if it sounds simple and stupid...let me know where i can start.
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Here is another tutorial - though this is for front-loaded horns:
Simple Offset Driver HornResp Tutorial - How to design your own Bass Horn - AVS Forum
Simple Offset Driver HornResp Tutorial - How to design your own Bass Horn - AVS Forum
thanks for the reply, keep them coming !!
here is the primary speaker parameters if someone ever want to try loading them up in the programm (which i still didnt masterised how to do it
)
i have winISD and it comes with a low fz at 24hz with a ported box.
paramter of the speaker:
fs 29hz
vas 45L
QMS 7,89
QES 0,5
QTS 0,47
dia 12 inches
max excursion is 65mm
here is the primary speaker parameters if someone ever want to try loading them up in the programm (which i still didnt masterised how to do it
)i have winISD and it comes with a low fz at 24hz with a ported box.
paramter of the speaker:
fs 29hz
vas 45L
QMS 7,89
QES 0,5
QTS 0,47
dia 12 inches
max excursion is 65mm
Simple Offset Driver HornResp Tutorial - How to design your own Bass Horn - AVS Forum
This covers parameter entry.
This covers parameter entry.
This driver isn't efficient enough for high output at low distortion in a simple reflex, but if it has at least 15 mm of Xmax, then it will in theory do the DD/DTS/THX 115 dB reference at 1m/400 W, but this is based on the listening position, so either some room gain or more Xmax will be required to meet it.
Here's one like you want, but FWIW, a ducted port alignment is theoretically slightly more acoustically efficient in slightly less bulk.
GM
PS: driver brand/model for my records please........
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thanks for all the numbers, there is something i am not doing right, my screen is different than yours, maybe i dowloaded a wrong version ?
and for the human alike, the S numbers are the volume of each section of the throat righ ? i try hard to understand here...i am begginer with thoses designs.
ok, i corrected my drawing a litle bit.
The reason i want to make such a box is because i heard one designed like that and the bass was soo deep. Maybe my expectations are wrong but at least this is easy doable.
At first i wanted to make an equivalent front loaded box with a single port, the port beign at the back and the lower portion beign just a rough horn.
Volume A beign around 75L
Volume B beign the port, which is a rectagular calculated port at 1" by 16" by 20" long, for a tuning frequency of about 24hz,
and volume C would be just some sort of exit/horn...
maybe it sounds too simple mind, let me know what you think.
The reason i want to make such a box is because i heard one designed like that and the bass was soo deep. Maybe my expectations are wrong but at least this is easy doable.
At first i wanted to make an equivalent front loaded box with a single port, the port beign at the back and the lower portion beign just a rough horn.
Volume A beign around 75L
Volume B beign the port, which is a rectagular calculated port at 1" by 16" by 20" long, for a tuning frequency of about 24hz,
and volume C would be just some sort of exit/horn...
maybe it sounds too simple mind, let me know what you think.
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The SWR-1242D only handles 500wrms (250 per coil).
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield Signature
I can't believe Alpine-USA won't provide the T/S parameters on their site.
Alpine Electronics of America, Inc.
Alpine Electronics of America, Inc.
yeah i had a hell of a time finding the specs. the canadian web site is down btw for several years.
on the data sheet i have it says 1500w peak per coil, 500rms. Anyway, for what it changes...
You're welcome!
Don't know, mine is V26.00 and don't recall it looking any different from any recent versions. Anyway, what are the differences you're seeing?
Right, they are the cross sectional areas in cm^2. For folks like me that only think in Imperial units, highlighting the values and pressing F6 brings up a conversion window.
GM
well, i came upon the Tuba HT on BFM web site, it looks quite easy and impressive.
I am just concerned about the power handling of that sub enclosure itself, everyones states that they only drive it with lets say 25w, 60w,...and get plenty of bass. Ok, i buy the idea, but what happens if i drive it with more than 250w ?
Will it overload the box design ?
I am just concerned about the power handling of that sub enclosure itself, everyones states that they only drive it with lets say 25w, 60w,...and get plenty of bass. Ok, i buy the idea, but what happens if i drive it with more than 250w ?
Will it overload the box design ?
OK, but did it use this driver?
Regardless, reducing the rear chamber's Vb and adding a straight initial expansion increases its HF gain BW above 100 Hz at the expense of some acoustic efficiency with the length and flare frequency governing the shape of its pass-band response. Unfortunately, adding another section means the Loudspeaker Wizard is disabled, so you'll have to do it the old way of tediously comparing different input values instead of seeing it in real time as you use its sliders.
Anyway, using your dims and adding a 20" long flared section expanding to ~116.25"^2 (750 cm^2) yields a ~maximally flat half space response of ~23.7 Hz -185 Hz. Again though, the simple ducted port alignment I suggested yields more bang/buck and easier to build, but being more acoustically efficient it's ~50% bigger also, though still tiny by my standards for a 'sub'.
Note that published specs are probably off enough to render all this moot unless significant EQ is used.
GM
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