I can't recall the exact dimensions. In transit back from USA to AUS as we speak.
shameless plug
A small donation to your favourite charity or Erin Hardison and you get the complete build plans for this amazing 6.5" 2-way in a very slim and compact 14L cabinet.
end shameless plug
Huge interest cause I am not only making this system I need to make boomboxes and namy things for my famaly thats why I got in this Hobby. I am 51 yeasr old and semi retired to have time and money. Already got huge inventory drivers and minidsp and hypex amps. I have a carpenter on my payroll fulltime since we have some carpentyr work going on in our houses and offices. I am finding it difficult to understand minidsp and winISD setting I have a LXmini but since with the plan I got minidsp file so I didnt have to do anything. I find REW complicated also have umik but never used it. I can give teamview access to helper I need little handholding thats the problem with me. I live in India and getting person to help me use measurement cant find person. I have a 2K sq ft basement that I doing my DIY hobby of speakers and furniture and electric scooter DIY
I need person to design cabinet and suggest what configuration is required I can get it boxes made thats not a problem. I have CNC shops in my city
where to give donation and link and will I get minidsp or crososover file
If you want to roll your own, and have time and interest to learn, the best, and first thing you should do, is enrol in Marius Tanasescu's course on Udemy:
https://www.udemy.com/course/acoustics-201-loudspeaker-measurements/#instructor-1
Take these in order:
101 course (basics and enclosure design)
201 course (how to take measurements)
and then how to design speaker crossovers
The best $100 investment, and you get watch and pause and rewind at your own pace.
If you like to read books instead, there are lots of great books published last century like Vance Dickason's Loudspeaker Cookbook or Speakerbuilding 201, but Marius has read them all and runs a visual and auditory concise, and uses reasonably up to date theory and practice.
After that, start your own thread and ask away.
If you just want to have a speaker to plug and play like the Lxmini, just make a donation and send the receipt to me by starting a conversation with me. I will send you the cabinet plans and crossover design. I run miniDSP Flex 8, but I could give you files for 2x4HD. If you twist my arm I can do files the nanoDigi.
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Thank you yes I will surely go through them but frankly I know my nature and my background is finance will be tough to understand I will go mad . I like to follow plan what people with experince do and use miidsp to load their crossover I dont have shortage of hypex amps drivers and carpentry thats why I took LXmini to start sine its with plan. ready for inexperieced people like me. Trovels also has kit purifi 6.5 and viawave ribbon ( I got the same driver) but doent give/ sell diagram or minidsp / hypex file and I dont want to buy drivers as kit since i already have. India has crazy high customs import dutes and taxes. So I have to be reasonabe in my hobby
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That is incorrect!
The size of the woofer will affect the amount power needed to produce resonance. Even ignoring that, the balance of indirect and direct energy to the listener, in the room changes, by ways of the size of the Radiation Mass and Directivity, in favor of the Larger woofer. Spl at the listeners ear will be an accumulation of Direct and Indirect energy, Lessening the size of the radiation mass, will increase the proportions indirect energy, thus lessening Sound Quality.
As I pointed out, the issue isn't the stroke length, the issue is the small radiation mass. The lesser amount of energy needed by the larger woofer, is not to be discounted, is it?
Someone just spoke up, the other day, How the 8" was the best of both worlds, in the consideration of the pioneers at least. Whoever they might be. Still, the majority of people here, that I've spoke to, preferred to see the 15" as the Apex mid range, along side a Compression driver on a large horn/waveguide, also, being an Apex of midrange.
Dispersion (of the smaller woofer) is not Better lol, its definitely wider and sooner. How wide do you want it lol. In the designs like Geddes Monitor utilizes the high directivity of the 15" and matches it at the XO with a large Waveguide..... The higher directivity in the system is tailored and desirable. Technically, Better, as the IR will reflect....when Direct energy is increased in proportion to Indirect.
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Don't quote only part of a response because the rest of it contradicts the point you are trying to make. Your point is separate from what Lars actually said.
lol What? The rest...of his quote? The quote I quoted and "the rest of the quote" contradicts the point I am trying make...its all the same. Other wise his whole quote would be Contradictory.....
The bolded part is the important bit you cut off. Read it as it is written. The far field on axis SPL is due to volume displacement, the SPL in the far field does not change whether it is a small driver working like an air pump with high excursion or a large driver moving hardly at all, what matters in that specific instance is their volume displacement capability.
Basically how loud any driver can get depends on it's volume displacement capability. You tagged incorrect under this, when it is absolutely correct.
Your point is that how the driver produces the SPL is important to how it sounds and I would agree with you, this is completely separate. The bolded part of the quote just makes it clearer about the specific circumstance that is being described.
Everyone can make mistakes but if you read something Lars has said involving physics and acoustics and you think he is wrong, just like Earl Geddes, it is wise to make sure that you have understood what they actually meant before disagreeing.
It still sounds off to me..."the point is that the far field on axis SPL is only a function of the air volume acceleration produced by the piston/cone. "
Why does this matter...Whos listening in the Far field in a small room? And what about all the people listening closer than far field?...Its like talking about what happens in an anechoic chamber...when the actual listening happens in an echoic room. Thats little strong of an analogy but the orininal comment is as strong by saying "it doesn't matter"
"This means that it does not matter whether we use a large short stroke woofer or a smaller long stroke woofer as long as they give the same volume displacement/acceleration."
It does matter....There are more pieces to the puzzle than "spl on axi"s......
Why does this matter...Whos listening in the Far field in a small room? And what about all the people listening closer than far field?...Its like talking about what happens in an anechoic chamber...when the actual listening happens in an echoic room. Thats little strong of an analogy but the orininal comment is as strong by saying "it doesn't matter"
"This means that it does not matter whether we use a large short stroke woofer or a smaller long stroke woofer as long as they give the same volume displacement/acceleration."
It does matter....There are more pieces to the puzzle than "spl on axi"s......
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You and I must be speaking to very different people. I have never heard anyone argue that 15" is the idea size for a midrange. I've bene to a few DIY meets and competitions, seen dozens of designs presented, and never seen a 15" midrange. I'm sure they exist, but it's a bit of a stretch to suggest they represent any majority opinion.
The only place he said it didn't matter is when working out how loud something can be. You took it to mean something other than what he said.
You know those “15” midranges” are all about high voltage sensitivity and maximum SPL (dynamic range) right?
In a domestic environment a 6.5” midrange should be enough. Lots of people are happy with a 3-5” midrange. Actually most people are happy with none, if you look at the market for pure midranges.
But 640KB used to be enough.
I think Camplo wants a 15” mid.
A 15” mid with an effective cone diameter of 14” can hit 140dB/1m for 250Hz, with only 9mm x-max. Perfect for the Purifi neutral surround technology.
HD2 and everything else probably more than -100dB down
If you build it Lars, Camplo will come.
AWESOME!
In a domestic environment a 6.5” midrange should be enough. Lots of people are happy with a 3-5” midrange. Actually most people are happy with none, if you look at the market for pure midranges.
But 640KB used to be enough.
I think Camplo wants a 15” mid.
A 15” mid with an effective cone diameter of 14” can hit 140dB/1m for 250Hz, with only 9mm x-max. Perfect for the Purifi neutral surround technology.
HD2 and everything else probably more than -100dB down
If you build it Lars, Camplo will come.
AWESOME!
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I definitely would buy into a 15" Purifi woofer... but if you are saying those monitors have no place in small rooms you are mistaken... those woofers are high efficiency, and since every one of those are mastering monitors with exception of the Geddes ns15 which is equivalent, their actual design goal is highest sound quality.
.... I would be more interested in the Scientific sound quality aspects, not so much human preference.... if one speaker model was truer to the source and the other one was "the group fav "....I'd go for the former.
Neat.
I guess I must have misunderstood. Based on this:
I assumed that you were referring to DIY speaker builders; and claiming that a majority of them agreed 15" was an optimal size for a midrange.
I do agree there are some impressive commercial products that use a 15" midwoofer. Maybe Purifi will make one someday if there's demand.