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Help Understanding Tekton Tweeter Array Schematic?
Help Understanding Tekton Tweeter Array Schematic?
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Old 16th April 2019, 03:34 PM   #1
dualuxe is offline dualuxe  United States
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Default Help Understanding Tekton Tweeter Array Schematic?

I have a pair of Tekton Double Impacts and I am trying to understand the details of the tweeter array. I created the attached schematic from my pair.

Can any of you crossover gurus break this down and explain the functions of circuit?
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File Type: pdf Double Impact Tweeter Crossover.pdf (301.6 KB, 152 views)
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Old 16th April 2019, 05:37 PM   #2
planet10 is offline planet10  Canada
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Help Understanding Tekton Tweeter Array Schematic?
I am no XO expert but this is what it looks like to me:

Click the image to open in full size.

dave
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File Type: png tekton-double-impact-TXO.png (12.7 KB, 1100 views)
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Old 16th April 2019, 07:35 PM   #3
planet10 is offline planet10  Canada
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Help Understanding Tekton Tweeter Array Schematic?
It seems to me that the sensitivity of Ta = Tb + Tc but the other 4 are going to be 3 dB louder? Perhaps that is what the EQ is for?

dave
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Old 16th April 2019, 08:18 PM   #4
DougL is offline DougL  United States
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Cool idea.
As you go down in frequency, more drivers kick in, adding more cone area.
Without details, hard to say where the ".5"'s add in.
Depending on the Rdc of the inductor, the 4 may be equal loudness to the other drivers.
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Old 16th April 2019, 08:22 PM   #5
planet10 is offline planet10  Canada
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Help Understanding Tekton Tweeter Array Schematic?
That would have to be a lot of Rdc.

dave
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Old 16th April 2019, 08:27 PM   #6
lowmass is offline lowmass  United States
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If planet's scema is right it makes sense to me. I see it as an array that grows in size as the frequency goes down.

Ta is the "point", then gradually at a lower freq Tb Tc come into play and at this stage there is rightly a vertical "line array" of 3 units, then eventually at a lower freq still the entire array is active.
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Old 16th April 2019, 08:34 PM   #7
dualuxe is offline dualuxe  United States
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Planet 10’s redraw of my schematic is correct. By the way, the tweeters are SB Acoustics SB29RDNC-C000-4.
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Old 16th April 2019, 10:26 PM   #8
dualuxe is offline dualuxe  United States
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Could someone explain the second order high pass and equalization circuit? I cannot find any resources that explain the equalization portion of the circuit layout. Thanks!

Last edited by dualuxe; 16th April 2019 at 10:36 PM.
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Old 17th April 2019, 09:12 PM   #9
dualuxe is offline dualuxe  United States
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Bueller? Can someone explain how to the attenuation RC in series (1ohm/8.2uF) is calculated?
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Old 17th April 2019, 11:52 PM   #10
AllenB is offline AllenB  Australia
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The resistor shelves the capacitor at some frequency *. Around this point and at higher frequencies the capacitive reactance is below 1 ohm and the resistor is effectively shorted. At lower frequencies, 1 ohm is added to what the 15uF capacitor is doing.

The 1uF capacitor almost looks to be unnecessary, but is likely making a subtle but wanted change in the response. Simulating would make this much easier to understand.

* [about 20kHz - 1/(2*pi*1*0.0000082)]

Last edited by AllenB; 17th April 2019 at 11:56 PM.
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