That was single driver vs. two.
What about two vs. two, other reversed?
The backside has frame, spider and motor making obstructions, but they appear above typical woofer range.
What is W-M xo of model B? What is mid's and tweeter's dispersion really?
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Yes, single driver vs. two. I am to lazy to turn one speaker and mechanically it is also problematic, they just did not fit to the panel other way.
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OK, it's domestic harmony you were worried about, not acoustic performance. I never realised before that I could get interior design tips and relationship advice on diyaudio. I'm learning all the time! 😉
Yes the model B is big. However at 60cm wide, it's only a mini-pallet. It's not even as wide as a Quad electrostatic.
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I agree, the wide baffle and wings seem an odd choice for mid and treble. It would be interesting to see measurements.
For the the sake of your argument for performance, and let’s say you could get a mini pallet past the warden, I can’t see a reason not to use 2 18’s stacked then. Add a .5 coil to the bottom to counter baffle step and raise the bottom end 6db. Power the lower section with a flea amp ( expected SPL 1w1m with a 4ohm load is gonna be at least 100db) with DSP and good gracious…..that’s a speaker!
Or take a page from my book…..slot load 4 18’s for around the same footprint?……..you won’t be able to cross them above 150hz though as the slot will add a steep low pass filter around 125hz. You’d need an 8” pro mid to play that low.
In this lyngdorf model b, are the 6 woofers loaded by a sealed box, and radiate as dipole? or are they loaded as open-baffle, and radiate as push-pull dipole?
So a Z-fold OB with sufficently tight fit that they get some of Nelson’s slot loaded woofers effect and a bit like the Heil-like woofer shown at TridodeFest.
dave
dave
No,but it is difficult to get exact info https://steinwaylyngdorf.com/steinway-sons-model-b/
My conception is that the box is closed and backside woofers are in opposing polarity but placed with cone visible to make dipole wavefront
My conception is that the box is closed and backside woofers are in opposing polarity but placed with cone visible to make dipole wavefront
If you see the video, the bass module consists of two narrow open baffle connected mechanically with each other only at the edge of the baffle. The remaing of the baffle is just protective grill for cosmetic reason.
By connecting all the driver in phase, both open bass baffles will be in push-push configuration mechanically. It will reduce vibration greatly.
By connecting all the driver in phase, both open bass baffles will be in push-push configuration mechanically. It will reduce vibration greatly.
There are no closed boxes involved.
That link you gave to the Steinway Lyngdorf website - it says this: "In every conventional loudspeaker, the woofers have to work against the compressed air inside a closed cabinet. Furthermore, any enclosure adds sound coloration. In the Model B, all woofers are mounted on an open rigid aluminum frame without any enclosure limiting them."
There is a cloth front grille concealing the magnets of the rear facing drivers, that's all.
They have done a very good job hiding the backsides... even the graph drawing hides the backsides!
https://steinwaylyngdorf.com/downlo...F&wpdmdl=3216&refresh=66b0c4b8f1d791722860728
https://steinwaylyngdorf.com/downlo...F&wpdmdl=3216&refresh=66b0c4b8f1d791722860728
If they would slot load it, they could hide fronts too...could look better.
They look a little 'boxy' to me and user might be tempted to place them close or even worse, right at wall. Not my problem though, as i do not have that much money to buy such speaker.
They look a little 'boxy' to me and user might be tempted to place them close or even worse, right at wall. Not my problem though, as i do not have that much money to buy such speaker.
Hi all
I guess it is just a dipole in push-pull configuration with the drivers cramped together as much as possible in the horizontal plane.
Regards
Charles
P.S.: Placement and looks are not my problem either, as I do not have that much money to waste by buying such speakers.
I guess it is just a dipole in push-pull configuration with the drivers cramped together as much as possible in the horizontal plane.
Regards
Charles
P.S.: Placement and looks are not my problem either, as I do not have that much money to waste by buying such speakers.
Now looking at the pic I ask myself if the "box" is open at both sides? That would make acoustic behaviour really mysterious even if woofers are push-push. Nelson Pass's SLOB is not better at all basically. Four lobes, quadripole? Total elimination of room modes 😎
It's worth saying, too, that Peter Lyngdorf has a long audio pedigree, and most of it is not the megabucks stuff. As well as the Lyngdorf brand (obviously) he's behind Dali, and is one of the founders of Purifi. His first commercial open baffle speakers, I believe, were the Dali Skylines, which date from about 1990 - that's before Siegfried Linkwitz's Audio Artistry designs. My introduction to open baffles (other than electrostatics) was a second-hand pair of the Dali Skyline 2000, fifteen years ago. They were real ear-openers.
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I took clips from the factory video. That must be old version, different from the present version at homepage. The video shows that the woofer system is sort of H-frame. Mid.tweeter is wide U-frame or are the sides open?
S-L have many speaker models from in-walls to dipoles, many of them use open back planar-magnetic tweeters and special dsp-amps.
S-L have many speaker models from in-walls to dipoles, many of them use open back planar-magnetic tweeters and special dsp-amps.