In progress: 3-way line array consisting of:
12 e,a, Satori 5" MW13TX-8 in cardioide, power tapered in 3 steps
Satori TW29BNWG tweeter
6 e.a Wavecor SW182BD03 7"rear subwoofers in closed box /EQ
Hypex 503 integrated at bottom rear in column.
Dummy-box is tested and revised a couple of times..
Will it sink or will it flow ;-)
12 e,a, Satori 5" MW13TX-8 in cardioide, power tapered in 3 steps
Satori TW29BNWG tweeter
6 e.a Wavecor SW182BD03 7"rear subwoofers in closed box /EQ
Hypex 503 integrated at bottom rear in column.
Dummy-box is tested and revised a couple of times..
Will it sink or will it flow ;-)
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Looks like quite an undertaking. But its doable and should yield an excellent speaker. Good luck.
Roll inn for mid tweeter (pre-lim values); combined active and passive, DSP in Hypex will iron it out. Woofers will be EQ'ed to 27 hz.
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Thank you Adason. All parts are in-house and sheets are now in the CNC-mill. This is a result from friendly and innovative contributers in a Norwegian forum.
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What do the horizontal and vertical patterns look like?
Challenging as always, you guys always do the fun stuf!
Challenging as always, you guys always do the fun stuf!
given the shape, there is a focal point that the signals from all drivers reach with the same path length, i.e the radius of the curve. I think that means you need to have your head at the right height.
Other than that, which turn out to be too much vertical directivity, there should be good vertical directivity to make it relatively immune to floor and ceiling reflections.
Horizontal directivity will decrease with frequency based on the size of the drivers It looks like there is a waveguide for the tweeter to match its H to the mids above and below it.
Looks like it "should" work.
Other than that, which turn out to be too much vertical directivity, there should be good vertical directivity to make it relatively immune to floor and ceiling reflections.
Horizontal directivity will decrease with frequency based on the size of the drivers It looks like there is a waveguide for the tweeter to match its H to the mids above and below it.
Looks like it "should" work.
Thanks Wesayso & nc535 . Tweeter (with wave guide) is positioned in ear height and mids low pass to 300hz and 600hz is symmetrical to tweeter axis. Measurements to come. Listening position will not be at the focal point, but more near the speaker where the listening window is about 0,5m height. At this position we measure and dial in in the house curve by DSP. For cardioide, you might see the same part in a "Sigberg" cardioide development thread.
so the tweeter is a coax? with side vents for cardioid? even better!
Several years ago I explored a ton of vituix simulations looking for the best way of embedding a tweeter in a line array. Back then I hadn't learned how to do cardioid and I hadn't found a coax I considered smooth enough in the HF. So I never considered what you are doing here. Now cardioid coax is my favorite thing but I think I'm going to settle for a bookshelf version.
Several years ago I explored a ton of vituix simulations looking for the best way of embedding a tweeter in a line array. Back then I hadn't learned how to do cardioid and I hadn't found a coax I considered smooth enough in the HF. So I never considered what you are doing here. Now cardioid coax is my favorite thing but I think I'm going to settle for a bookshelf version.
The curved baffle may be detrimental, I'd say go for a flat baffle. You certainly have a very good project, line array vertically and narrow beamwidth cardioid horizontally.
The tweeter is at the center of column, connected to Hypex xo at 2000 hz 1.st order
The 6 subwoofers at rear are connected to Hypex XO at 75 hz 1.st order (preliminary base points).
(The Hypex FusionAmp FA503 (500W+500W+100W, Ncore) is a 3-way DSP plate amp)
The set points and orders may be altered after measurements and listening sessions.
As you already might have guessed, not very unlike to example Buchardt S500 & Dutch and Dutch 8C.
We also concider a rear tweeter, not very sure about that yet.
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Going back to your first post. The third image from the left - are those resistive side vents you are showing?
So the mid array is cardioid but not the coax?
So the mid array is cardioid but not the coax?
Yes, the first two mids (75-2000 hz) near tweeter at the front have 3 cardioide ports at each side where one is located at the front.
The next two mids (75- 600 hz) have two ports located at each side.
The last 8 mids (4+4, 75-300 hz) have one port at each side per driver.
Inner damping pads are PET based (40 kg/m3) from HVAC sound attenuator industry. We are now determining the thickness and layers.
The next two mids (75- 600 hz) have two ports located at each side.
The last 8 mids (4+4, 75-300 hz) have one port at each side per driver.
Inner damping pads are PET based (40 kg/m3) from HVAC sound attenuator industry. We are now determining the thickness and layers.
Attachments
To me it seems you have thought about quite a few things. Will you incorporate front wall correction options on the low channel like Genelec, D&D and others do?
The Hypex dsp will allow for phase alignment. But: As the rear baffle is curved, the distance to wall will be different for each woofer. We will investigate how this will affect a possible boundary coupling adjustment as the wavelength is high at 75 hz.
There will be no "smart switch" to compensate for wall boundary compensation. The Hypex EQ can of course be manually adjusted for unwanted bass-jumps caused the loudspeakers room location in question. It is not a Dirac Live smartbox though.
