Melded piezo array switching - Full/Half/Off
- LelandCrooks
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Re: Melded piezo array switching - Full/Half/Off
Yes.
If it's too loud, you're even older than me! Like me.
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Re: Melded piezo array switching - Full/Half/Off
How do I wire 6 tweeters with a dpdt switch?
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Re: Melded piezo array switching - Full/Half/Off
Not sure why you'd want the half off option. When people put in that switch, they usually have a melded array with at least 12 piezos. So, their half off still has 6 running. Since you have only 6, you may want to just try it with a straight on and off setting. Not sure there would be that great of a difference between 3 and 6 that a little EQ couldn't fix.ONvENTURES wrote:How do I wire 6 tweeters with a dpdt switch?
6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
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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Re: Melded piezo array switching - Full/Half/Off
I think the "half" setting is not for tone control but rather to decrease the height of the array in order to increase the vertical dispersion of the tweeters. Useful is the cab is on the ground on backline duty so that you can hear the highs as the performer.Bruce Weldy wrote: Not sure why you'd want the half off option. When people put in that switch, they usually have a melded array with at least 12 piezos. So, their half off still has 6 running. Since you have only 6, you may want to just try it with a straight on and off setting. Not sure there would be that great of a difference between 3 and 6 that a little EQ couldn't fix.
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience
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Re: Melded piezo array switching - Full/Half/Off
Well, that could be - but unless you are 10 feet in front of the cab, I don't think there is enough difference between half and full in vertical dispersion to hear the difference. And by going half, you've cut the sensitivity in half also.CoronaOperator wrote:I think the "half" setting is not for tone control but rather to decrease the height of the array in order to increase the vertical dispersion of the tweeters. Useful is the cab is on the ground on backline duty so that you can hear the highs as the performer.Bruce Weldy wrote: Not sure why you'd want the half off option. When people put in that switch, they usually have a melded array with at least 12 piezos. So, their half off still has 6 running. Since you have only 6, you may want to just try it with a straight on and off setting. Not sure there would be that great of a difference between 3 and 6 that a little EQ couldn't fix.
I just don't see this as being worth the trouble with only 6 tweets.
6 - T39 3012LF
4 - OT12 2512
1 - T24
1 - SLA Pro
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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Re: Melded piezo array switching - Full/Half/Off
I guess I still don't follow. I'm not sure whether it was confirmed that it cannot be wired to HALF in the middle position, or if that was meant to be a description of how to do it. Thanks for any help.
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Re: Melded piezo array switching - Full/Half/Off
Regarding the question asked by ONvENTURES, can anyone confirm that this modification to the diagram would work for a 6 piezo array?
Does this make sense, or what should be done differently?
Does this make sense, or what should be done differently?
Re: Melded piezo array switching - Full/Half/Off
It cannot. The centre terminals will be connected to either one end or the other end; thus, the switch's centre position is "off".wocketpatch wrote:I guess I still don't follow. I'm not sure whether it was confirmed that it cannot be wired to HALF in the middle position, or if that was meant to be a description of how to do it. Thanks for any help.
To further explain: imagine holding the "hashed box" in the picture between your index finger and thumb (thumb on the left side) on your right hand. Now rotate your hand 90 degrees counter-clockwise, and this gives you the picture beside the hashed box.
The diagram works. However, you might want to have the top 4 "on", or the top 2 "on" when in the "half" position. The fewer tweets that are on, the more vertical dispersion you will have. As was stated earlier, even 6 tweets open up the vertical dispersion significantly.wocketpatch wrote:Regarding the question asked by ONvENTURES, can anyone confirm that this modification to the diagram would work for a 6 piezo array?
Does this make sense, or what should be done differently?
TomS
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Re: Melded piezo array switching - Full/Half/Off
Thanks, does this change represent what you are suggesting?
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Re: Melded piezo array switching - Full/Half/Off
OK just one more question.. In the version below, should I wire the two outliers (in the top right of the diagram) in series as shown, or would it be better to do those two in parallel? Does it even matter? Any other thoughts on this arrangement are welcome before I heat up the iron as I'm finding the impedance question seems to be a somewhat different one than what I'm used to with regular drivers. Thanks again.
- Bill Fitzmaurice
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Re: Melded piezo array switching - Full/Half/Off
+1.Bruce Weldy wrote: I just don't see this as being worth the trouble with only 6 tweets.
- Clef's of Bass
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Re: Melded piezo array switching - Full/Half/Off
Questions about tweeter switching:
I'm currently building a J15 paired with an 8 ohm Delta lite 2515 and 20 piezo tweeter melded array.
I presume that the piezo crossover would be at 8 ohm as well, wired in parallel with the 15 making the cab's impedance @ 4 ohm?
I'm planning on wiring in the 3 way tweeter switch (bass player here).
If the tweeter is switched to half, or off would it change the tweeter's impedance? or would it stay @ 8 ohms regardless of switch position?
I'm asking this because I'm still deciding on an amp head.
I'm currently building a J15 paired with an 8 ohm Delta lite 2515 and 20 piezo tweeter melded array.
I presume that the piezo crossover would be at 8 ohm as well, wired in parallel with the 15 making the cab's impedance @ 4 ohm?
I'm planning on wiring in the 3 way tweeter switch (bass player here).
If the tweeter is switched to half, or off would it change the tweeter's impedance? or would it stay @ 8 ohms regardless of switch position?
I'm asking this because I'm still deciding on an amp head.
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Re: Melded piezo array switching - Full/Half/Off
Hi, and welcome to the forumClef's of Bass wrote: ↑Fri Jan 15, 2021 7:35 pm Questions about tweeter switching:
I'm currently building a J15 paired with an 8 ohm Delta lite 2515 and 20 piezo tweeter melded array.
I presume that the piezo crossover would be at 8 ohm as well, wired in parallel with the 15 making the cab's impedance @ 4 ohm?
I'm planning on wiring in the 3 way tweeter switch (bass player here).
If the tweeter is switched to half, or off would it change the tweeter's impedance? or would it stay @ 8 ohms regardless of switch position?
I'm asking this because I'm still deciding on an amp head.
Your cab will be a nominal 8 ohm load.
Half/on/off switching shouldn't really affect impedance to much as the piezo's are parallel/series wired, and the woofer low pass is 8 ohms.
A bit further down in my way old plans, it says:
electric bass doesn’t need the high frequency sensitivity of a full array. These concerns are addressed by using only four to ten tweeters in a melded array, or two to six in a flat array. To maintain adequate power handling wire a two-tweeter flat array in series; the other tweeter count options are wired series/parallel.
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...