Yet another reminder I really, really need to do a bracing write up as this type of bracing is way overkill from a structural engineering POV. 🙁
That would be a very valuable write up. I think some designers go overboard on the internal bracing, because they don't really know how much is needed. So it's easier to build in way too much, than try to figure it out more precisely.
True, no such thing as too rigid, just a point of diminishing returns.
High aspect ratio cabs in particular require vertical rib bracing along its long side ~71% of its length, then vertical tie ribs or dowels to tie all six sides together to keep it from 'breathing', using this system to brace/support/mass load large drivers. Ideally, end caps would be thicker or at least have diagonally offset ribs.
If more mass [weight] is required/desired, then make it a removable base, top, potted plant, whatever, attached with industrial Velcro tabs and from sad/expensive experience as of 2003 I do mean just fairly small dots as it's so much more powerful than consumer grade it's not even comparable.
Of course it can be used on 'bookshelf' size cabs, but better IME to make rigid via mass.
High aspect ratio cabs in particular require vertical rib bracing along its long side ~71% of its length, then vertical tie ribs or dowels to tie all six sides together to keep it from 'breathing', using this system to brace/support/mass load large drivers. Ideally, end caps would be thicker or at least have diagonally offset ribs.
If more mass [weight] is required/desired, then make it a removable base, top, potted plant, whatever, attached with industrial Velcro tabs and from sad/expensive experience as of 2003 I do mean just fairly small dots as it's so much more powerful than consumer grade it's not even comparable.
Of course it can be used on 'bookshelf' size cabs, but better IME to make rigid via mass.
Hey, let's include the Greg above!
Aside of this...no,. really, Greg, the Loud and Beautyful Is a good image, but, aside of that, I Just wrote that the maximum size of a woofer should be no more than 6" in diameter. Ok, let's get It over...what about horns?
What the guy said about horns?
And, my pleasure, I'm Tony😀
The internal braces don't need to be as "complicated" as they look on Troels' website. He's got some designs with a simple rectangular box in your preferred "Monkey Coffin" format, which should be easy enough to make. Also, the Open Source Monkey Coffin was designed explicitly with woodworking simplicity in mind.
Greets!
Ah! A real name! I wish it was mandatory to only use verifiable legal names on these types of [monitored] forums.
6" effective diameter or frame size and why your upper limit for HIFI/HT apps?
Do you mean horns for controlling directivity due to long distance to the listening position [LP]?
Well, as I wrote - It must be post#11😀- the model is the classic two way for typical room apartment or bigger.
I had good experience with speakers like that- It must be post#14 for complete analysis- but that was 35 years ago...
So, yes to both...being analitycal regarding the frame,well, the bigger the better?! (It Is rhetoric and no Need to reply; in any case, the answer is no
)
I had good experience with speakers like that- It must be post#14 for complete analysis- but that was 35 years ago...
So, yes to both...being analitycal regarding the frame,well, the bigger the better?! (It Is rhetoric and no Need to reply; in any case, the answer is no
)
It's One of the pros of music reproduction vs live event.
...as I wrote today in another thread...It must be post #28000 😱
One of the pros of music reproduction vs live event Is the function of sonority vs distance.
Someone was saying that the process was Always subtractive
...as I wrote today in another thread...It must be post #28000 😱
One of the pros of music reproduction vs live event Is the function of sonority vs distance.
Someone was saying that the process was Always subtractive
So a Kef R7 sounded bad in that flat volume ???
You have a 1 000 budget to do better ?? Is that a joke
I would keep the 1000 and investigate elswhere : amp or dac or both. Also listening position ! What ? The sofa near against the opposit wall in a 8x5 square meter room and no one is seing the problem ? !
At this level I don't think the op will be more happy with a refurbished half pro vintage speaker, or kits than half of the advisers had not listened themselves. If the Coffin project is certainly a good idea I'm not sure the loudspeaker is the culprit but more the integration of the whole.
I sincerely beleive one should direct the op towards dsp and not vintage myths, bigger the better, old good better box, blah ! It's a flat in Paris not a cave man. There is a confusion mix in the analysis.
Especially for that budget ! It will end like : it sounds no good as well, plus the WAF problem.
Ask more to some people how to henhance the Kef R7 for few and launch an analysis problem with further decriptions of your problems. I would have move myself to the flat if there was not this stupid asiat virus problem to help !
Hope that helps
You have a 1 000 budget to do better ?? Is that a joke
I would keep the 1000 and investigate elswhere : amp or dac or both. Also listening position ! What ? The sofa near against the opposit wall in a 8x5 square meter room and no one is seing the problem ? !
At this level I don't think the op will be more happy with a refurbished half pro vintage speaker, or kits than half of the advisers had not listened themselves. If the Coffin project is certainly a good idea I'm not sure the loudspeaker is the culprit but more the integration of the whole.
I sincerely beleive one should direct the op towards dsp and not vintage myths, bigger the better, old good better box, blah ! It's a flat in Paris not a cave man. There is a confusion mix in the analysis.
Especially for that budget ! It will end like : it sounds no good as well, plus the WAF problem.
Ask more to some people how to henhance the Kef R7 for few and launch an analysis problem with further decriptions of your problems. I would have move myself to the flat if there was not this stupid asiat virus problem to help !
Hope that helps
Last edited:
So a Kef R7 sounded bad in that flat volume ???
You have a 1 000 budget to do better ?? Is that a joke
I would Simply dismantle them and...
You know what the english did with the jeep?
Yes, a range rover 😎
You have a 1 000 budget to do better ?? Is that a joke
I would Simply dismantle them and...
You know what the english did with the jeep?
Yes, a range rover 😎
😀... or simply begining by drawing a triangle and put the head inside it, not outside near a room mode intersection 😱. Take care to loudspeakers position, amps and source. Eventually look at the filter, though ask some experience.
Last edited:
Since the aim of a cabinet Is to separate the front from the back emission of the speaker, and that the speaker Is going to be located very near to a Wall, and of space permits, wouldn't be wise to make holes in the Wall and mount the speakers there?!
Oh no no! Wasn't this thread about 200l each available in bookshelf space, disponibility of using modern advanced technique ?!
I haven't listened to it, but this was designed to be simple to make, on walls, so with the front wall parameter in the design. It should be budget friendly. Heissmann-Acoustics | WaveWall 182.2 | In-Wall Lautsprecher
Problem with conventional loudspeakers is they have the front wall from at leat one meter to the front wall often to sounds nice.
The sofa is farer than the width of the room, which can be quite complicate for the sweet spot and listening confort.
Maybe a cornu spirale pair as well with a standalone subwoofer as well ? why not behind the listeners, so in the wall behind the sofa ?
I will no bother more if the listening position and family don't permit to let play a better loudspeaker. Cause at the ends it is the same to ask a bigger car to drive around the bloc only. Loudspeakers with DSP could make sense as well, but already said. Classic Monkey coffins, or pencil speakers (which is not a bad idea) are ok with a chair moved closer from the loudspeaker instead the sofa.
A further crazyness could be LX Mini close to the sofa and sided walls but tilted in towards the sofa with the aproval of Madame who could be proud about an original little piece of art that is original for a loudspeaker.
No more idea (ah si : a pro loudspeaker à la Neuman 😛 in lieu of the LX Mini: DSP, amp embeded, so no wires intrusives)😎 ....
Problem with conventional loudspeakers is they have the front wall from at leat one meter to the front wall often to sounds nice.
The sofa is farer than the width of the room, which can be quite complicate for the sweet spot and listening confort.
Maybe a cornu spirale pair as well with a standalone subwoofer as well ? why not behind the listeners, so in the wall behind the sofa ?
I will no bother more if the listening position and family don't permit to let play a better loudspeaker. Cause at the ends it is the same to ask a bigger car to drive around the bloc only. Loudspeakers with DSP could make sense as well, but already said. Classic Monkey coffins, or pencil speakers (which is not a bad idea) are ok with a chair moved closer from the loudspeaker instead the sofa.
A further crazyness could be LX Mini close to the sofa and sided walls but tilted in towards the sofa with the aproval of Madame who could be proud about an original little piece of art that is original for a loudspeaker.
No more idea (ah si : a pro loudspeaker à la Neuman 😛 in lieu of the LX Mini: DSP, amp embeded, so no wires intrusives)😎 ....
I'd say the monkey coffin, the real One by Mbwrenna(?)
Like Neumann, if no better, Who knows...certainly DIY Wins 😉
Not my kind of idea of correct reproduction but...
Like Neumann, if no better, Who knows...certainly DIY Wins 😉
Not my kind of idea of correct reproduction but...