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ok, its big.
Does anyone know where I can get a bus that seats 40 comfortably but is only 10 feet long, goes 130mph and gets 30 miles to the gallon?
Thanks!
/trollface
Thanks!
/trollface
Sure DrDyna, in dwarf land they have a bus that runs on hydrogen. Trying to not disrepect this site but this isnt the site to discuss top bus designs, not many here care about transportation and > 10people performance. There are better sites with those who are complete nuts about bus.
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The final answer is obvious, you have 5 choices
Use drivers that are known to work in horns, throw them in horn response, move the slider around to get what you want--subtract 2dB for box flex and 1 or 2dB at the top for power compression and build.
If you don't want to learn horn response, use a plan that already is done--use the driver(s) specified.
Model a ported box and keep adding boxes until your requirements are met.
Buy subs off-the-shelf
Try to find a design that allows both a really inexpensive woofer to be used, if it gets smoked, you'll have the option to put a much stronger speaker in the box to handle requirements.
Since the last option has the lowest cost to build--and if you blow it up the $200 box can be re-used, it is the best option. Finding such an option requires a lot of searching on the boards but you might get lucky. Generally, that option requires becoming very good at Horn Response to see if a $100 driver can be swapped with a $250+ speaker without major problems.
If the box is 3/4" Baltic Birch, gorilla glued seams, correct bracing, steel handles, stout carpet or industrial paints, pro-grade input connections, thick corner hardware to protect the corners, machine screw inserts in the wood, high grade screws/fasteners to hold everything together, high quality sealants, gasket materials/Loc-Tite and very accurate prep work, that is expensive and very time consuming.
What are the odds that someone would make a very expensive and complex enclosure with all the best materials then throw a marginal speaker inside? Survey says....
Use drivers that are known to work in horns, throw them in horn response, move the slider around to get what you want--subtract 2dB for box flex and 1 or 2dB at the top for power compression and build.
If you don't want to learn horn response, use a plan that already is done--use the driver(s) specified.
Model a ported box and keep adding boxes until your requirements are met.
Buy subs off-the-shelf
Try to find a design that allows both a really inexpensive woofer to be used, if it gets smoked, you'll have the option to put a much stronger speaker in the box to handle requirements.
Since the last option has the lowest cost to build--and if you blow it up the $200 box can be re-used, it is the best option. Finding such an option requires a lot of searching on the boards but you might get lucky. Generally, that option requires becoming very good at Horn Response to see if a $100 driver can be swapped with a $250+ speaker without major problems.
If the box is 3/4" Baltic Birch, gorilla glued seams, correct bracing, steel handles, stout carpet or industrial paints, pro-grade input connections, thick corner hardware to protect the corners, machine screw inserts in the wood, high grade screws/fasteners to hold everything together, high quality sealants, gasket materials/Loc-Tite and very accurate prep work, that is expensive and very time consuming.
What are the odds that someone would make a very expensive and complex enclosure with all the best materials then throw a marginal speaker inside? Survey says....
lol, I think you miss my point. ALL bass horn designs are HUGE, its an inherent fact to the design. For a 20Hz horn, its not that large considering its 30"x20"x60"
Its honestly easier to hide then many 10cuft ported designs because it can be a stage or placed up against the wall (like a wall unit). Someone could paint it the same color as a wall, mount a plasma on the front, etc and it could disappear into the room.
What is your max foot print, what is your max budget, what max SPL do you want and what is the lowest tuning point? Those are the important questions.
im no dj or sound guy, this is just a fun project for me.
1.im flexible on footprint, but weight no more then 120 lbs complete, ideally no more then 12 cubic feet, a 6 cube box that delivered some killer bass with 400 watts would be great. im really into the *highest quality* bass below 60 hz. outdoors. not highest spl sacrificing quality.
2.$250 including ply.
3.as much as i can get without damaging equipment.
4.35 hz.
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to summarize...
1. Size <= 12 cuft (prefer 6 cuft)
2. $250 including wood ( I assume not including amp)
3. 35Hz.
4. As much SPL as possible. You actually need to figure out what SPL you want, its very important to the design.
FWIW, small foot print, High SQ and good SPL levels never equates to LOW dollars. Something has to give. For those $$$ you have to sacrifice size and build a bass horn if you want output and SQ but since your tuning point is 35 Hz, you should be able to keep it below 12 cuft.
1. Size <= 12 cuft (prefer 6 cuft)
2. $250 including wood ( I assume not including amp)
3. 35Hz.
4. As much SPL as possible. You actually need to figure out what SPL you want, its very important to the design.
FWIW, small foot print, High SQ and good SPL levels never equates to LOW dollars. Something has to give. For those $$$ you have to sacrifice size and build a bass horn if you want output and SQ but since your tuning point is 35 Hz, you should be able to keep it below 12 cuft.
if you had to build a horn subwoofer and had no computer.
lets say thee was $10,000 to be won in a competition 🙂
if you had no way to measure a speakers ts params,, and no way to calculate a horns response, but using all you know about what might work and what to avoid.
in a nutshell, how would you go about building an experimental horn?
im sure it can be done, that a clever person could take almost any driver build a horn for it, and have that horn perform well, maybe not realize the last 8% of performance, but a good working effective horn.
what things/details would need to be included and avoided to have it work?
keep your answers simple fellas 😉
lets say thee was $10,000 to be won in a competition 🙂
if you had no way to measure a speakers ts params,, and no way to calculate a horns response, but using all you know about what might work and what to avoid.
in a nutshell, how would you go about building an experimental horn?
im sure it can be done, that a clever person could take almost any driver build a horn for it, and have that horn perform well, maybe not realize the last 8% of performance, but a good working effective horn.
what things/details would need to be included and avoided to have it work?
keep your answers simple fellas 😉
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landing a man on the moon
lets say there was $10,000,000 to be won in a competition 🙂
if you had no way to measure the rockets engines thrust, and no way to calculate gravitational pull, but using all you know about what might work and what to avoid.
in a nutshell, how would you go about building an experimental Apollo moon rocket?
im sure it can be done, that a clever person could take almost any gasoline or other fuel build a rocket for it, and have that rocket perform well, maybe not realize the last 8% of performance, but a good working effective rocket.
what things/details would need to be included and avoided to have it work?
keep your answers simple fellas 😉
lets say there was $10,000,000 to be won in a competition 🙂
if you had no way to measure the rockets engines thrust, and no way to calculate gravitational pull, but using all you know about what might work and what to avoid.
in a nutshell, how would you go about building an experimental Apollo moon rocket?
im sure it can be done, that a clever person could take almost any gasoline or other fuel build a rocket for it, and have that rocket perform well, maybe not realize the last 8% of performance, but a good working effective rocket.
what things/details would need to be included and avoided to have it work?
keep your answers simple fellas 😉
yea, because building a box that go boom is rocket science.
ps. god knows the difference between helpful and spiteful 😉
im not afraid to ask questions others are afraid to ask, some of the threads i started developed into excellent discussions/debates.
i spose they could be consolidated,
i have zero attachment to them *ohm*
i spose they could be consolidated,
i have zero attachment to them *ohm*
I would just put it in reasonably sized sealed cabinet.
It gets complicated with ports and horns.
Oh, I'm not afraid to ask about modelling a horn without using a computer, I just find it rhetorical to use a computer to ask how to do something without a computer.
2 plus 2
60ndown....
You've asked the same question over and over, in many threads, and you refuse to hear the answer. I intentionally used your own words to try to bring that to light. Again, I failed. Let me try a couple different analogies and see if either of them work.
You are 16, you are given a car -- dad holds the keys in his hands and says, go have fun. You want to go get in the car and drive. Dad says, take the keys. You say, I don't want to take the keys, I just want to drive. Dad says, no son... you must use the keys. You get irritated and say, reasonable people must just be able to get in a car and drive... I don't need keys.
In this analogy, hornresp is the keys to the car.
A second analogy even simpler.
You want to know how to add 2 plus 2, but you don't want to use math.
You have the tools available to you (your hands) they are free, there are good tutorials written for you that show you how to count on your fingers to add 2 plus 2.
You refuse, you assume 2 plus 2 is like putting 2 and 2 together and you end up with 22.
A subwoofer cabinet is a mathematical answer. To get a mathematical answer, you must use math. Even if it has been simplified to the point of using keys to start a car, or counting on your fingers -- it's still math.
Hornresp is as easy as using car keys and counting on your fingers. If you want to design a subwoofer -- use it, or any of the other free software that accomplish the same thing.
60ndown....
You've asked the same question over and over, in many threads, and you refuse to hear the answer. I intentionally used your own words to try to bring that to light. Again, I failed. Let me try a couple different analogies and see if either of them work.
You are 16, you are given a car -- dad holds the keys in his hands and says, go have fun. You want to go get in the car and drive. Dad says, take the keys. You say, I don't want to take the keys, I just want to drive. Dad says, no son... you must use the keys. You get irritated and say, reasonable people must just be able to get in a car and drive... I don't need keys.
In this analogy, hornresp is the keys to the car.
A second analogy even simpler.
You want to know how to add 2 plus 2, but you don't want to use math.
You have the tools available to you (your hands) they are free, there are good tutorials written for you that show you how to count on your fingers to add 2 plus 2.
You refuse, you assume 2 plus 2 is like putting 2 and 2 together and you end up with 22.
A subwoofer cabinet is a mathematical answer. To get a mathematical answer, you must use math. Even if it has been simplified to the point of using keys to start a car, or counting on your fingers -- it's still math.
Hornresp is as easy as using car keys and counting on your fingers. If you want to design a subwoofer -- use it, or any of the other free software that accomplish the same thing.
Read about "Transflex"; practically you don't need any measure, because it's a pure quarter wave resonator with a smart speaker position...In theory it would be better to know at least Fs to choose wave lenght hence Transflex size, but it's not fundamental.
bleh,
and you continue to prove unable to answer *the asked question*
if we left a reasonable man in a woodshop with some tools and drivers and asked him to build a subwoofer horn, using his best guesses/skills, and he did so, he would create a horn based subwoofer, a few hours listening and tweaking the design and he may even have something quite good.
you would have nothing, you would offer multiple reasons why it was not worth picking up any tools.
and you continue to prove unable to answer *the asked question*
if we left a reasonable man in a woodshop with some tools and drivers and asked him to build a subwoofer horn, using his best guesses/skills, and he did so, he would create a horn based subwoofer, a few hours listening and tweaking the design and he may even have something quite good.
you would have nothing, you would offer multiple reasons why it was not worth picking up any tools.
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