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Over 30 year old software. Actually nearer to 40 years. Simply amazes me. REW, now ARTA is open for download. ARTA is very fully featured. And REW is quite a step above MLSSA.

Right beside you! I was never really much good at complex mathematics. But measuring drivers and loudspeakers yes!

I would love to see John get involved and we all end up with a Klippel capable measurement method. It's called price driven competition. Right now they are priced as the only game in town. To see that change would be so lovely. Mark

It's critical when you are charging $100 000 for a pair of 2-way loudspeakers. Electrically it is not much different than copper. Mark

That aluminium in the middle is key as well. At least I think it is comparing it to other work I have done. I'll include it, and be able to turn it on and turn it off in the simulations.The same goes for the rear side of the magnets. When you have no steel wicking the flux the magnets behave a...

Who writes this stuff? There's bits of truth. It's just so much other crap in there that annoys me. Back in the early 80's when I was wet behind the ears reading all this stuff I'd have questions about all these things. But being out in the countryside in rural Canada, good libraries were not an...

Well Steve you nailed the under designed part. This is supposed to be a midwoofer, and I see a midrange, spider/damper. One that is really more of a cone tweeter style damper/spider than a damper that is designed for a driver that should support reasonable levels of bass.

Nice! I didn't have this picture.

That is not true. Parts of these speakers are very well engineered. I try to never denegrate people. Michael Borreson if he copied Steve's design still needed to figure it out. That cone is interesting. To say that it's the best? Well best they can do. I have worked with spread tow carbon fiber...

Copper or aluminium basically shove around magnetic flux. There's much more to it. But that is the gist of their purpose. Thickness of the non-ferrous metal, position of the metal is all important. Ass in the shape of the metal that you are trying to force to have a useful flux field within. As...

I know who could build it. The main trouble is that it must be assembled with the magnets pre-charged. Magnetized. That requires a press, and special jigs. We are talking seriously harmful forces with this much neodymium. Also the exotic crazy Neodymium grades are not exactly a huge gain on...

:facepalm::facepalm::facepalm::facepalm::facepalm::facepalm: Anything non-magnetic would be just as good. The shape has some utility. But to sell this at 500 000 Euros you need some craziness. I started to read their sales technobable. I had to stop. I was searing at my defenceless monitor. To...

Now that I have a better handle on the size. I should go back and rework my guestimates.

It will. Busy today. Last night was dealing with questions from China.

You reminded me of pics I took at the Montreal Audio Show last year. They are smaller than my initial extrapolations. Which means those machine screws are not an M3 for one thing. They are probably an M2 that will resize everything to about the correct guess by olieb.

Hard to argue when you are right!

Step one. As on side a picture as I can find. Educated guess that these are M3 machine screws. My getting old eyes like a large screen so I use a 43 inch 4K TV for my Monitor. As you can see a 730% zoom. This gives me a 12mm cross section on the M3 Machine screws as measured by my ultra...

So we are going to need to guess about a few things. As I look through and come up with ideas I'll post the reasoning behind each of them. Altering any demension in the simulation is trivial. The Spreadsheet is only a convenient interface method to call out to the other program components...

My compendium of pictures from Borreson Audio. I make a living knowing what other companies do, and figuring out how it's done. So, I need to establish a few baselines and then try and configure some dimensions for the driver simulations.

That is completely related to quantity. That 3D metal printed basket will be in the hundreds all by it's self. So per driver cost in 500pcs? I would throw a dart in the vicinity of $500. Take away the funky basket that rally is doing nothing of any real value and I'd put it at about $280. Nobody...