Author Topic: Crossover alteration from two to three way  (Read 285 times)

Offline mygoggie

Crossover alteration from two to three way
« on: May 06, 2018, 10:23:30 PM »
I need one of the in the know members to help me to determine if I can adapt or alter a JB Systems CN9 Professional 2-way crossover ( https://www.audiomart.co.za/product_info.php/systems-cn9-professional-way-crossover-p-6512 ) from a two way to a three way unit.

I currently have the crossover installed in a speaker cabinet I built a while back, but the sound produced needs a midrange driver, which the crossover does not accommodate as is.

So I am hoping to find a way to make the crossover work or alternatively I need someone to tell me it will not work and I need to flog it.

If you need more info I will gladly provide such.
Herman

~ To heal the soul is to embark on a new journey. ~

Online vinyljan

Re: Crossover alteration from two to three way
« Reply #1 on: May 07, 2018, 07:08:50 AM »
Not really "in the know" but:

You might be able to modify existing high pass to bandpass, and then add additional HPF.  But with a new midrange added you might want to change the existing LPF  (currently 2000 Hz)....not worthwhile I think.
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Offline bbe22

Re: Crossover alteration from two to three way
« Reply #2 on: May 07, 2018, 11:22:38 AM »
your ref point to  a generic pre-made Crossover.
These are good to take apart and save the different elements (coils caps and resistors) in your parts bin for when you need them.
Fixed X-overs such as these based on text book values rarely if ever are suitable to be used as is. (2 or 3 way) :(

Offline mygoggie

Re: Crossover alteration from two to three way
« Reply #3 on: May 07, 2018, 12:00:44 PM »
OK, so the best is I get a design finished for a new crossover.

Will read through all the threads on this board and see how far I can get. I know nothing about this ATM ...   :vsad:
Herman

~ To heal the soul is to embark on a new journey. ~

Offline bbe22

Re: Crossover alteration from two to three way
« Reply #4 on: May 07, 2018, 12:22:34 PM »
If u have drivers ready to use ,  2 or 3 way ,  it is best to do a dedicated  X-over to suit. If that's not your cuppa tea there are forum members that can help ............
In short it goes like this
measure bass and get T/S parameters to see what type and size  of box  (or no box , OB ) u need
same for mid in 3+ way if not sealed back
Design   and build suitable enclosure
Do in box measurements for all drivers in preferred location on baffle
Design X-over  , build and test
final fit and finish
sit back and enjoy

Offline chrisc

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Re: Crossover alteration from two to three way
« Reply #5 on: May 07, 2018, 12:56:52 PM »
There is a pending order (shared shipping) to Parts Express in the USA for components that the CT Hi-Fi Club have organised.  They have 2 and 3-way crossovers, you just need to choose the speaker impedance and crossover points

See:  https://www.avforums.co.za/index.php/topic,71302.0.html

If you would like to take part, have a look at what PE have

Here is an example, but there are several pages of units

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Offline bbe22

Re: Crossover alteration from two to three way
« Reply #6 on: May 07, 2018, 01:23:44 PM »



Offline mygoggie

Re: Crossover alteration from two to three way
« Reply #7 on: May 07, 2018, 03:01:19 PM »
Thanks for the info. I think the route to go will be for me to rather build one and see what I can learn from it.
Herman

~ To heal the soul is to embark on a new journey. ~