Help needed with XOVER design :) thx :)

[endrek]

Hi again

I'm working on a X12 Speakerplans.com
and i'm doubting of some things,
first of all, wich type of filter should i use if i want to make a pasive filter? Wich order? wich type?(with wich type i mean, bessel, butterworth,etc.... (my knowledge about electronics, isnt really good))

And the other question is, at what frequency should the filter separate the 2 woofers freq from the horn-driver???

thx for all

[picowallspeaker]

1) You can ask the designer
2) You can use an electronic crossover ,since it's a PA design it may be appropriate .
3) You can use the magic formulas that give you the values ,which may be adjusted later when listening and not finding them good enough.

I think that your question is a little naive The crossover is the heart of a loudspeaker , and it has to be 'conceived' together with the speaker selection and the cabinet design .
In this X12 project ,the woofers would be paralleled ,right ? So you'll have a low impedance path for the low-mids and a higher impedance path for the trebles . At what volume will you be listening to them ,when finished ?
You can even 'feed' the tw with only a capacitor ( 1st order) at low volumes.
Not very safe for the tw if you turn up a little bit .

Also ,most important , the passband behavior of any speaker adds its own response to the final curve .

[chrisb]

Originally Posted by picowallspeaker

Also ,most important , the passband behavior of any speaker adds its own response to the final curve .

if not at least several octaves on either side of the putative "crossover frequency" , thereby somewhat complicating things

[endrek]

Originally Posted by picowallspeaker

1) You can ask the designer
2) You can use an electronic crossover ,since it's a PA design it may be appropriate .
3) You can use the magic formulas that give you the values ,which may be adjusted later when listening and not finding them good enough.

I think that your question is a little naive The crossover is the heart of a loudspeaker , and it has to be 'conceived' together with the speaker selection and the cabinet design .
In this X12 project ,the woofers would be paralleled ,right ? So you'll have a low impedance path for the low-mids and a higher impedance path for the trebles . At what volume will you be listening to them ,when finished ?
You can even 'feed' the tw with only a capacitor ( 1st order) at low volumes.
Not very safe for the tw if you turn up a little bit .

Also ,most important , the passband behavior of any speaker adds its own response to the final curve .

1) designer isn't avaible at his email
2) if i use a electronic XOVER (DSP you mean right??) i will need to put two connectors to the X12 right? so i can separate the signal into MF and HF right? Or can i separate it with just one connector?? any advices please?
3)About the magic formulas, i'm starting to look/learn about it. Any good site to look? or cookbook?


they are intended to be for high volume application, as loud as possible hehe.

My final goal is:
I'm building 2 bassreflex box with Fane Colossus 18 XB driver each. (40-200HZ aprox.)
And i'm building two X12. Thats why i'm thinking of a passive filter inside the X12 to sseparate MF and HF.
And I'm going to buy the correct amplifiers for them and a digital XOVER/COMP/LIM/EQ (DSP) for the all the PA
Any suggestions?? Or wich should be the better configuration???What i'm doing wrong? What can i improve?

pd: don't be cruel, i'm newbie, and i'm starting to learn everything
thx for your help
Really appreciate you can take me to the good/best goal

[picowallspeaker]

I'm a 1/2 newbie too ( from about 20 years )
Making a good crossover for the X12 might be quite a challenge ....also it depends whether you want to obtain a really flat response (hi-fi specs ) or you can live with the dips and peaks of a horn + driver combo .
Good thing is to have a mini-lab , with a pc and a microphone and software like ARTA ,so you'll have a solid basis to start with.

[Keriwena]

I'm thinking this forum needs a subtitle, as "fullrange" isn't always taken by newbs to mean "fullrange drivers". Can't blame them, as "fullrange speaker systems" is a common and perfectly acceptable nomenclature.

[Cal Weldon]

Moved to Multi Way