SLA Pro High pass crossover

Short and Transmission Line Arrays for Pros
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SethRocksYou
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SLA Pro High pass crossover

#1 Post by SethRocksYou » Mon Mar 23, 2020 10:48 am

I just want to verify that the high pass crossover is the same for the 2, 4, and 6 tweeter options in the SLA Pro. Is that correct? Same circuit for all?

Thank you

Bruce Weldy
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Re: SLA Pro High pass crossover

#2 Post by Bruce Weldy » Mon Mar 23, 2020 10:50 am

SethRocksYou wrote:
Mon Mar 23, 2020 10:48 am
I just want to verify that the high pass crossover is the same for the 2, 4, and 6 tweeter options in the SLA Pro. Is that correct? Same circuit for all?

Thank you
Yep....I only see one option in my plans....

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

SethRocksYou
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Re: SLA Pro High pass crossover

#3 Post by SethRocksYou » Mon Mar 23, 2020 11:41 am

Everyone seems to be out of the Dayton 4 ohm resistors. Is a 3.9 or 4.3ohm an option or should I just hunt down a 4ohm resistor?

Grant Bunter
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Re: SLA Pro High pass crossover

#4 Post by Grant Bunter » Mon Mar 23, 2020 3:15 pm

SethRocksYou wrote:
Mon Mar 23, 2020 11:41 am
Everyone seems to be out of the Dayton 4 ohm resistors. Is a 3.9 or 4.3ohm an option or should I just hunt down a 4ohm resistor?
Within 10% is fine. I would think a 3.9 was better than a 4.3 though, closer anyway.
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

Bruce Weldy
Posts: 7100
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: SLA Pro High pass crossover

#5 Post by Bruce Weldy » Mon Mar 23, 2020 3:59 pm

Grant Bunter wrote:
Mon Mar 23, 2020 3:15 pm
SethRocksYou wrote:
Mon Mar 23, 2020 11:41 am
Everyone seems to be out of the Dayton 4 ohm resistors. Is a 3.9 or 4.3ohm an option or should I just hunt down a 4ohm resistor?
Within 10% is fine. I would think a 3.9 was better than a 4.3 though, closer anyway.
Doesn't matter because....
download (2).jpg
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6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

Bruce Weldy
Posts: 7100
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: SLA Pro High pass crossover

#6 Post by Bruce Weldy » Mon Mar 23, 2020 4:00 pm

Geez....sorry.....I'm so damned bored.. even started my daughter's taxes....and now they ain't due til July....

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Bill Fitzmaurice
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Re: SLA Pro High pass crossover

#7 Post by Bill Fitzmaurice » Mon Mar 23, 2020 4:32 pm

Grant Bunter wrote:
Mon Mar 23, 2020 3:15 pm
Within 10% is fine. I would think a 3.9 was better than a 4.3 though, closer anyway.
4.3 is better, as the purpose of that resistor is to set the minimum impedance load the amp can see at very high frequencies, where the capacitive nature of piezos causes their impedance to be very low, approaching a dead short.

SethRocksYou
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Re: SLA Pro High pass crossover

#8 Post by SethRocksYou » Mon Mar 23, 2020 10:37 pm

Ordered. Thanks everyone.

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