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The making of: The Two Towers (a 25 driver Full Range line array)
The making of: The Two Towers (a 25 driver Full Range line array)
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Old 13th January 2021, 11:52 PM   #6561
TNT is offline TNT  Sweden
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The making of: The Two Towers (a 25 driver Full Range line array)
Yes - I suppose I described a long and tall ESL63 but maybe it wouldn't produce a sphere as you say.. for some reason unknown to me.

Now, I don't know if I'm hit with spherical sound waves at concert hall 8th row?

I'm sure one could have quite interesting time experimenting with such a system anyway...

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Old 14th January 2021, 12:04 AM   #6562
wesayso is online now wesayso  Netherlands
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That's the one firing in rings, right? Basically Tom made the equivalent of that in a horn shape.

While I do use a straight array, the DSP will try to make it into the right shape again. Most people say of arrays: they make everything sound huge! Well, not if you absorb early reflections, avoid diffraction and use DSP to make them behave.

They sound huge on full scale recordings, small if the recording captured that. And anything in between.

If I weren't using arrays, I'd have horns. But I'd need to have the room for them too, which is why I have arrays. Good choice? I'm not complaining!
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Last edited by wesayso; 14th January 2021 at 12:06 AM.
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Old 14th January 2021, 01:55 AM   #6563
fluid is offline fluid  Australia
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Quote:
Originally Posted by wesayso View Post

I bet I could make an even better proposition, if I were to wire the array differently. Nah, maybe I won't take that bet, as it would involve accepting other compromises that could make it hard to achieve.

More time to sim?
I would be interested to see what you could come up with relaxing the wiring restrictions, if the vertical could be widened somewhat that would open up a lot more tweeter possibilities. If I was to do anything to my arrays I would most likely rebuild the whole thing as a v2 so exploring these sort of possibilities is interesting.
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Old 14th January 2021, 09:23 AM   #6564
wesayso is online now wesayso  Netherlands
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If you look at the bend sims I posted, even that would be a possibility to widen the output, up to a limit. Also Crumboo's wiring scheme is a different example on how to have more ways to widen the beam.

I can't promise to try it, as I am fully committed to see my own filtered array come to life. I've spend a lot of time coming up with that, it would take me at least an equal amount of time to try another schematic.
You'd have to know the listening axis height in advance, if using a tweeter, can we do the tricks Crumboo showed, to have the design axis below the central tweeter axis? What does it do to the IR? What do the different heights look like in such a case?
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Old 14th January 2021, 10:43 AM   #6565
fluid is offline fluid  Australia
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Originally Posted by wesayso View Post
I can't promise to try it, as I am fully committed to see my own filtered array come to life. I've spend a lot of time coming up with that, it would take me at least an equal amount of time to try another schematic.
Totally understand, I have my hands full trying to get my waveguide speaker progressing, running ribbon sims in ABEC doesn't help that either but sometimes ideas come up that are interesting enough to be distracting
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Old 14th January 2021, 11:40 AM   #6566
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Old 15th January 2021, 07:46 PM   #6567
wesayso is online now wesayso  Netherlands
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I'd figure it would look something like this:
The making of: The Two Towers (a 25 driver Full Range line array)-24-1x-tc9-fr-shaded-six-pack-png

(tweeter position is missing, the zero position has no driver)

Schematic:
The making of: The Two Towers (a 25 driver Full Range line array)-24-1x-tc9-fr-shaded-xo-schema-1-png

As the correction I used the FIR correction file for a single TC9.

According to line array theory, this should give me a 3 dB/octave drop, right?

The making of: The Two Towers (a 25 driver Full Range line array)-24-1x-tc9-fr-shaded-power-di-2pi-png
Positions 0, +100, -100 and +700 (floor and ceiling reflections on at -12 dB)
Attached Images
File Type: png 24+1x TC9 FR Shaded Six-pack.png (289.0 KB, 213 views)
File Type: png 24+1x TC9 FR Shaded XO-schema-1.png (33.1 KB, 214 views)
File Type: png 24+1x TC9 FR Shaded Power+DI (2pi).png (122.3 KB, 120 views)
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Last edited by wesayso; 15th January 2021 at 08:11 PM.
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Old 15th January 2021, 08:05 PM   #6568
wesayso is online now wesayso  Netherlands
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I'd say it may have a future .

It looks pretty even in response up to 4 KHz...
All it really needs is a killer tweeter (and most probably adjusting the height to make it fit).
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Last edited by wesayso; 15th January 2021 at 08:10 PM.
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Old 15th January 2021, 09:07 PM   #6569
Crumboo is offline Crumboo  Sweden
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Beautiful result!!

Y position for D20 and D23 is 0, I guess it shouldn't be?

Anyway - really nice! I'll copy your schematics and try it for myself
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Old 15th January 2021, 09:11 PM   #6570
fluid is offline fluid  Australia
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Interesting distractions can be worthwhile

That looks like much easier directivity to match at about 4K, when I've tackled the latest distraction I'll see if I can find a match
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