Hi thanks a lot These advices have been very valuable for me
There is a very important point that i did not consider If the cabinet absorbs vibrations takes out energy from the drivers
If the cabinet is stiff it does not absorb energy and the driver can unleashe all the energy to the room
This is an extremely important point that explain the importance to have a high stiffness cabinet
Therefore also for the satelllites is important to have a stiff cabinet
This changes completely my approach And bracing looks to be the way to reach high stiffness
This could be the reason why some speakers with a very stiff cabinet seem to sound louder With less compression
Very important point indeed
Then MDF will not be the best material at all considering its low stiffness
Maybe its cheapness this is the reason of its popularity
i do not want to sound trivial but there is no vibration without movement and viceversa
if you know a case please tell me
but this is not the very important point Stiffness is the key properties of great cabinets
this i understand prefectly I am already reading about stiffeners and so on How to improve the stiffness of a cabinet
there must be ways
this is not clear to me ... but again having established that stiffness is the most important property for cabinets now the goal for me is to understand how to increase stiffness of a cabinet in the most efficient way
As i said i have to mod something existing do to the lack of machinery and skills
For instance an old idea is to purchase a pair of speakers with great woofers
extract the mid and high increase the stiffness of the bass box and do some rework of the xovers and connections
nothing out of this world
this is also my thinking Some manufacturers think differently by the way
I think they are wrong But who am i to judge the others from my ignorance
At the end i start to see the good reason for metal cabinets a lot indeed A lot
hi thank you very much a lot I start to see the reason behind this choice Their price is staggering Out of my reach
I am looking at the prices of trunk boxes in metal ... they can cost up to 1000 USD each Only the box
The nice thing is that they can be opened and work inside very easily
Another idea to use metal just for the front baffle and bolt the woofer on it
to save on costs
One of the beautiful things about life is that each of us has our own beliefs and convictions, and we love them regardless of whether or not they are shared.
It is precisely from those convictions (which can sometimes even be wrong) that everything starts.
Then, one starts with his own way.
The Master says: "The first step is also the last".
Then it is up to the genius and sensitivity (I was about to say intelligence) of that someone to verify their ideas and convictions.
Some continue to believe in them even if they are shown the opposite.
But this too, in my opinion, is one of the beautiful things about life.
When sound propagates then air vibrates, but air does not move from the source of the sound to the listener.
If you realize this then you would have realized everything about also different things are related to.
I won't go into further explanations unless you want it to, in that case let me know and I will. 🙂
It is precisely from those convictions (which can sometimes even be wrong) that everything starts.
Then, one starts with his own way.
The Master says: "The first step is also the last".
Then it is up to the genius and sensitivity (I was about to say intelligence) of that someone to verify their ideas and convictions.
Some continue to believe in them even if they are shown the opposite.
But this too, in my opinion, is one of the beautiful things about life.
Yes and no.
Sure it is a singular kind of movement, but not the first meaning of the word "movement". 😉
When sound propagates then air vibrates, but air does not move from the source of the sound to the listener.
If you realize this then you would have realized everything about also different things are related to.
I won't go into further explanations unless you want it to, in that case let me know and I will. 🙂
If one had enough knowledge and was skilled enough to exploit the resonance of each object (and therefore of each material) to build a perfect cabinet then we would have taken a step forward of great importance in my opinion in the construction of well-sounding speakers.
Since virtually any material can vibrate and any object has its (or even more) own resonant frequency, if there was the knowledge and ability to channel this into building a great cabinet then it would be done.
And in fact that is precisely what is done, regardless of whether a matter is universally recognized or not.
But I don't think the perfect choice exists.
And to me you seem to be searching for perfection, which doesn't exist.
It's okay, of course, but one must be aware of it (so as not to suffer of it) and also one should not lose common sense, in my opinion
I believe metal is no exception, it is rigid (?) and it can vibrate and any object created with it will have its own (or even more) resonance frequency.
But here we are thinking theoretically, I believe.
And yet on a practical (and economic) level, the usability (and cost) of a material is a crucial and basic element in the construction of loudspeakers (and not only).
Do you have a real idea of what it means to build a metal cabinet DIY, how much it costs and how much it might weigh?
And what does it mean to "drill" all the relative holes?
And what does it mean to change (a part of) it?
And of course you also want it to look nice at the end of the day, right? 🙂
I believe that the knowledge acquired by most people and the fact that a material is preferred by most designers has its own reason and is not at all accidental.
Then, there are also brilliant minds and unconventional choices... 😉
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This is a light (about 1 kg) thin (3.4mm) plywood WAW enclosure, for about an 8 litre internal volume, not including the volume taken up by the full range section. Lots of bracing to make it very stiff, giving it a natural frequency well about that of the bass driver - the full range is mechanically decoupled.
I've also made some full range with fill in tweeter speakers, used 3.4mm plywood for the top and sides, damped by carpet tile with a thin felt between it and the ply - this seems to work well to, although they are well braced by the internal "Z" baffles
We want to absorb/eliminate/keep it inside/use part of the output of the back of the driver.
This whole thread of thot doesn't make sense to me.
dave
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Given the current state of loudspeakers — primitive and full of compromises. We have a long ways to go.
dave
Cylindrical sonotube or concrete cabinets have been the typical departure from 6-sided boxes.
Wesayso's full range line array construction has worked well, the same construction could be used for subs.
https://www.diyaudio.com/community/...ers-a-25-driver-full-range-line-array.242171/
Using laminated "bendy plywood" would waste far less material:
That said, extensive bracing of 6-sided boxes makes for much easier construction for similar acoustic outcomes.
Art
Wesayso's full range line array construction has worked well, the same construction could be used for subs.
https://www.diyaudio.com/community/...ers-a-25-driver-full-range-line-array.242171/
Using laminated "bendy plywood" would waste far less material:
That said, extensive bracing of 6-sided boxes makes for much easier construction for similar acoustic outcomes.
Art
Bells are excited by a strike on one point; the air pressure inside a sub would be evenly distributed around the circumference.
A tube would still be able to have ripples going up and down ( like if you pluck a guitar string right at one end), but a sub is unlikely to experience frequencies high enough to cause this.
A tube would still be able to have ripples going up and down ( like if you pluck a guitar string right at one end), but a sub is unlikely to experience frequencies high enough to cause this.
thanks again Of course a metal cabinet is a very challenging project
but i would love to understand is a no compromise/ideal cabinet do exist For woofers of course
however i have found two small 2 ways from Teac using a metal boxes ls-x8
this could work from 200 up i guess
woofers are the problem Always
If you really want metal on the cheap, why not visit a council reuse type centre and get some pipes or tanks to cut up. Iron is easy enough to weld and make presentable and aluminium, while more challenging, can be kerfed and brazed flame from a can for results superior to welding it
Even ratchet straps can be used to bend flat iron of the right thickness into a nice curved shape. Aluminium powder can be mixed with epoxy an used in glass laminate layers if you really want to get funky
Even ratchet straps can be used to bend flat iron of the right thickness into a nice curved shape. Aluminium powder can be mixed with epoxy an used in glass laminate layers if you really want to get funky
There are a lot of those. The first i sw were little Brauns, and then Cantons shaped to fit really well on the back deck of a car (just add Nak 550), I have 5 Radio Shack Optimus 7 — i really need to try Wolf_teeth’s XO. During my recycling on eBay days i probably ran into 20 or so different brands.
Nice little enclosures.
dave
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Of course it exists, it's called State of the Art.
But in my opinion it will be up to you to find it. 😉
Each of us can only speak according to his own experience.
Others will talk about their knowledge too.
Try to take a look at what the most highly rated (and I imagine expensive) subwoofer builders out there do.
And you will form your own opinions.
Will a $6 million system meet your expectations? LOL
https://www.digitaltrends.com/home-...s-studio-standard-6-million-kss-home-theater/
To do what?
An ideal subwoofer?
To put it into which system?
How much time did you give yourself to build all you need?
So what?
How big should your (woofer and) subwoofer cabinet be?
🤔
I agree, and that goes for any type of technology.
The art of choosing the lesser evil. 😉