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Multi-Way Conventional loudspeakers with crossovers

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Old 5th November 2019, 05:02 AM   #621
mabat is offline mabat  Czech Republic
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Thanks. No I don't, but you should be able to easily reproduce the shape anytime.

Now it would be interesting to see the horns measured in an (rounded) enclosure for how much of it is caused by the horn itself and how much by the improper termination. For example the slight widening between 2 - 5 kHz should not be there according to the infinite baffle simulation so I wonder if it is related to a particular termination.

- From these plots it seems that the time window was quite short, wasn't it. I guess that data below ~3 kHz are not very reliable.
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Old 5th November 2019, 05:49 AM   #622
jzagaja is offline jzagaja  Poland
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It was named d99: width 357mm, height 282mm, depth 125mm, coverage 90x80.
Can print rounded baffle. R= 5cm?

I've used 2ms gate for polars and 1.5ms for raw plots.

Qestion remains can we minimize second pulse in slot waveguide by using rounded slot end. Will make sketch.
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Old 5th November 2019, 05:57 AM   #623
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Why would you want a coverage wider than ~90 deg in the first place?

But I agree that for the smaller speakers it might be advantageous. You can easily modify this A9 for a wider coverage...
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Old 5th November 2019, 06:16 AM   #624
mabat is offline mabat  Czech Republic
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Quote:
Originally Posted by jzagaja View Post
I've used 2ms gate for polars and 1.5ms for raw plots.
Yeah, that's quite short. You can see that the truncation of the IR has still an obvious impact on FR below about 3 kHz, meaning it's not reliable there.
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Old 5th November 2019, 06:33 AM   #625
jzagaja is offline jzagaja  Poland
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Plus problem with RME Babyface, it has stronger impact.
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Old 5th November 2019, 06:45 AM   #626
onni is offline onni  Sweden
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Originally Posted by jzagaja View Post
Here you are. I requested elliptical design from Dr. Keele for direct comparison. Do you remember that black elliptical data?
That A9 seems very promising!

How far do you have to boundaries? 4 ms gate should be easy to achieve in almost any room.

/Anton
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Old 5th November 2019, 06:49 AM   #627
mabat is offline mabat  Czech Republic
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To be honest, I wouldn't expect such a strong reflection in the diffraction horn. I believe this is really not a typical behaviour, or is it? That would make them hardly usable at all. Despite of that, people seem to use them, still. What's going on here?
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Old 5th November 2019, 07:00 AM   #628
jzagaja is offline jzagaja  Poland
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Dr. Keele writes it is normal and minimum phase, easy to eq.
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Old 5th November 2019, 07:02 AM   #629
mabat is offline mabat  Czech Republic
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OK
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Old 5th November 2019, 07:25 AM   #630
mabat is offline mabat  Czech Republic
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Could you also show (or upload) the IRs for the two horns, say the ones for 10 deg?
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Last edited by mabat; 5th November 2019 at 07:28 AM.
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