I have the SLA Pros and T24. I have run into a need for small set of satellite speakers, so I'm trying to build a small set of line arrays that will fit in a tight area for both set up and transportation.Rick James wrote:Why didn't you just build SLAs?
Series/parallel wiring question.
Re: Series/parallel wiring question.
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Re: Series/parallel wiring question.
Using one output channel of your amp for SLA pro's, and one for your T24, obviously you can't run in stereo.
I think one SLA pro rather than 2 would provide a good output balance with 1 x T24.
Personally, I would add another T24 (daisy chained) before I added another SLA pro...
I think one SLA pro rather than 2 would provide a good output balance with 1 x T24.
Personally, I would add another T24 (daisy chained) before I added another SLA pro...
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...
Re: Series/parallel wiring question.
johns811 wrote:6 oNukePooch wrote:I'm missing something here...how do you take one 4 ohm driver and end up with a 6 ohm cabinet?johns811 wrote:I'm attempting to make 2 small line arrays, they are 4" wide and 36" tall, Each will have 6 4 ohm full range drivers.I was hoping to have the option connecting speaker 1 to speaker 2, OR also be able to connect them each off their own channel....So think I got the wiring down to make a 6 ohm cabinet.
I'm trying to wire 6 4ohm drivers, the way I understand it with 3 sets of 2 the math would be 4ohm * (3/2) which would be 6 ohm cabinet.
Okay, my mistake. I thought you were putting one driver per box, 6 boxes per side...then trying to wire the whole mess externally.
It's not 3 sets of 2, it's 2 sets of 3...As Tom Smit said, you want to wire banks of three drivers in series (12 ohms), then parallel two banks to get a 6 ohm cabinet load. There is no 4 ohm measurement anywhere.
I'd just run one cab per amp channel...they're not gonna take much power, so you don't need a big amp. If you absolutely need to run off of one channel, then parallel the boxes, and make sure you've got an amp that'll run 2 ohms. (the load will be 3 ohms, but amps are generally rated 2,4,8 ohms.)
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF
Re: Series/parallel wiring question.
is this correct to get 6 ohm using 4 ohm driver? (wiring)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
Re: Series/parallel wiring question.
johns811 wrote:is this correct to get 6 ohm using 4 ohm driver? (wiring)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
(edited)
Ugh...I was wrong , Grant's right. Both pictures will end up with the same result though they're wired differently....
Last edited by NukePooch on Tue Sep 15, 2015 3:13 am, edited 1 time in total.
Built:
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF
4 Jack 112L- 3012HO, melded array
17.5 wide AutoTuba with Infinity 860w
6 Wedgehorn W6 w/ Panel Mount Piezos
2 T48 Slims (15" wide) with 3012LF
4 T48 Fattys (32" wide) with 3015LF
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- Posts: 6915
- Joined: Mon Nov 28, 2011 11:12 am
- Location: Ilfracombe Queensland Australia
- Contact:
Re: Series/parallel wiring question.
The second one is from a set of Bill's plans I think you will find.NukePooch wrote:The first one is correct. Two banks of three drivers per bank.johns811 wrote:is this correct to get 6 ohm using 4 ohm driver? (wiring)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
The second picture is incorrect, three banks of two drivers per bank. This will likely let the smoke out of your amp. (or it will just shut down)
And it doesn't matter, either way is correct.
In example 1
3 x 4 ohms in series is twelve and 2 banks of those in parallel = 6 ohms
In example 2:
2 x 4 ohms in parallel is 2 ohms, add 2 ohms for the next pair, and again add 2 ohms for the third pair because you connected the three pairs with serial wiring, and you get 6 ohms...
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...
Re: Series/parallel wiring question.
It looks the same to me, just drawn a different way. Thanks for the feedback.NukePooch wrote:The first one is correct. Two banks of three drivers per bank.johns811 wrote:is this correct to get 6 ohm using 4 ohm driver? (wiring)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
The second picture is incorrect, three banks of two drivers per bank. This will likely let the smoke out of your amp. (or it will just shut down)
Re: Series/parallel wiring question.
Thank you, yes the 2nd drawing in the style Bill uses, I can understand it better for some reason.Grant Bunter wrote:The second one is from a set of Bill's plans I think you will find.NukePooch wrote:The first one is correct. Two banks of three drivers per bank.johns811 wrote:is this correct to get 6 ohm using 4 ohm driver? (wiring)
Also I found this diagram on the web which I think is the same thing. (wiring 2)
The second picture is incorrect, three banks of two drivers per bank. This will likely let the smoke out of your amp. (or it will just shut down)
And it doesn't matter, either way is correct.
In example 1
3 x 4 ohms in series is twelve and 2 banks of those in parallel = 6 ohms
In example 2:
2 x 4 ohms in parallel is 2 ohms, add 2 ohms for the next pair, and again add 2 ohms for the third pair because you connected the three pairs with serial wiring, and you get 6 ohms...
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- Posts: 6915
- Joined: Mon Nov 28, 2011 11:12 am
- Location: Ilfracombe Queensland Australia
- Contact:
Re: Series/parallel wiring question.
It's always good to understand.
Following the plans is always good too
Following the plans is always good too
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...
Re: Series/parallel wiring question.
I think I got the wiring correct, the volt meter said 6.5 ohms. They sound really good, should meet my needs for a small speaker that is light and easy to haul around. Total cost was about $100.
Re: Series/parallel wiring question.
Measuring resistance across the drivers does not equal the impedance of the drivers. 2 different specs that behave and affect the cab differently.
In your picture, it appears that your drivers are spaced quite a bit apart, nearly a driver's width. This is going to cause a lot of comb-filtering. If you are happy, so be it.
In your picture, it appears that your drivers are spaced quite a bit apart, nearly a driver's width. This is going to cause a lot of comb-filtering. If you are happy, so be it.
I know money often seals the deal, but seriously, quality is an investment, not an expense... Grant Bunter
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Accept the fact that airtight and well-braced are more important than pretty on the inside. Bill Fitzmaurice
Re: Series/parallel wiring question.
Not sure how I ended up spacing them that far apart. The cabs cost $8 each and this was sort of an experiment. What is the effect of comb filtering?
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- Location: New Braunfels, TX
Re: Series/parallel wiring question.
I don't think it will be all that bad since it's vertical and not horizontal.johns811 wrote:Not sure how I ended up spacing them that far apart. The cabs cost $8 each and this was sort of an experiment. What is the effect of comb filtering?
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: Series/parallel wiring question.
You'll never hear it once you're about two feet from the speaker. PA line arrays have that much space between cabs easily.DJPhatman wrote:Measuring resistance across the drivers does not equal the impedance of the drivers. 2 different specs that behave and affect the cab differently.
In your picture, it appears that your drivers are spaced quite a bit apart, nearly a driver's width. This is going to cause a lot of comb-filtering. If you are happy, so be it.
99% of the time, things that aren't already being done aren't being done because they don't work. The other 1% is split evenly between fools and geniuses.