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Old 26th September 2012, 01:57 PM   #11
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I measured the impedance curves by holding the drivers with my hand.
The woofer has very low mechanical losses. You can see that the peak at the fundamental resonance is sharp and narrow. That translates into a high Qms.
The edge resonance at 1kHz is just visible in the phase of the impedance curve as a small wrinkle. For such a low loss driver this is very well controlled and looks better then the preliminary data sheet. I do not care much about the small hole it may create in the frequency response at that frequency but undamped there would be a rise in distortion too. There is a sharper discontinuity at somewhat under 4kHz. That seems to be the cone break up frequency. A very high frequency for a paper cone so it is quite stiff. The driver should be very useful until 3kHz.
The tweeter looks simply perfect. Low, symmetric and well damped fundamental resonance. Both drivers have a very flat impedance curve so they must have some copper in the magnetic gap. Actually this kind of low rise is a rare sight so modulation from changing inductance over lever is very well controlled. Inductive modulation is a very nasty type of distortion so i am very happy to see this eroded here.
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File Type: pdf Satori TMT 4 Ohm Imp.pdf (17.4 KB, 373 views)
File Type: pdf Satori HT Imp.pdf (15.7 KB, 230 views)
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Old 27th September 2012, 06:33 PM   #12
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I came up with this shape for the cabinet.
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File Type: jpg Satori cab 2.jpg (92.0 KB, 2002 views)
File Type: jpg Satori cab 3.jpg (92.7 KB, 1951 views)
File Type: jpg Satori cab 4.jpg (70.1 KB, 1906 views)
File Type: jpg Satori cab 5.jpg (69.9 KB, 1842 views)
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Old 27th September 2012, 06:44 PM   #13
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Joachim i don't think many people could build a cabinet like that.
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Old 27th September 2012, 07:13 PM   #14
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Yeh, it needs a CNC program that transfers the dimensions into the rooter.
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Old 27th September 2012, 07:58 PM   #15
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If the kit includes a flat-pack cabinet then some extravagant affair is fine. If not I'd stick with a standard box, boring I know, but if it's to be build-able by the majority then that's pretty much necessary I think.

I'm looking forwards to how this turns out + additional measurements of the tweeter. It's going to be interesting to see how it justifies itself in the face of the already very nice standard version.
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Old 27th September 2012, 08:21 PM   #16
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The angle between the top plate and the baffle - is it 90?
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Old 27th September 2012, 09:19 PM   #17
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It is hard to see but the baffle is angled 8 back for delay alignement.
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Old 27th September 2012, 09:36 PM   #18
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That doesn't make it easier .
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Old 27th September 2012, 09:39 PM   #19
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Yes, it is hard to make with simple methods but i like it. I know that much of the fun is building the cabinet. I may come up with a simplified version but still i would like to make the proposed version too.
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Old 27th September 2012, 09:42 PM   #20
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When designing the cabinet i tried to make the sides from one piece instead of the triangles but my CNC program was too stupid to draw that element.
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