Active X-Over

jimmymcfarrell said:
Does anyone have any suggestions where I can buy a 3 way active crossover. Does anyone make one?
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There are plenty. It depends what you want to pay. The behringer http://www.behringer.com/DCX2496/index.cfm?lang=ENG

is a very popular unit amongst DIY types. Be aware it spit's out pro levels.

There are significantly more expensive units from dbx, klark technik, bss.

Another alternative is the expensive, but more consumer (rather than pro) oriented DEQX http://www.deqx.com/product.html

To really make a good job of this, rather than to merely screw around, you need very good measurements of the speaker(s)/drive units in question.. The tools to make those measurements can cost more than the crossovers...

It is a good idea to be fully familiar with Vance Dickason's "Loudspeaker Design Cookbook" (at a minimum) before you get started on whatever it is you have in mind...
 
Yeah! Make a full-range electrostatic speaker, or dump some Ted Jordan Drivers in a box! The PHY-PH drivers are also rather tasty... :)
 
cheers everyone.

"To really make a good job of this, rather than to merely screw around, you need very good measurements of the speaker(s)/drive units in question.. The tools to make those measurements can cost more than the crossovers..."


surley I can just set the filters on the active X-over at the same freqs. as the passive one already fitted in the speaker?
 
jimmymcfarrell said:
cheers everyone.

"To really make a good job of this, rather than to merely screw around, you need very good measurements of the speaker(s)/drive units in question.. The tools to make those measurements can cost more than the crossovers..."


surley I can just set the filters on the active X-over at the same freqs. as the passive one already fitted in the speaker?
Click to expand...

I think oedipus assumed you were using the active x-over to build DIY speakers, not just replace current passive ones.

I'd second the Bryston recommendation I have them in my active speakers and to my ears it sounds fab! The trouble with the Behringer is that you are limited to the quality of the A/D and D/A converters.
 
jimmymcfarrell said:
cheers everyone.

"To really make a good job of this, rather than to merely screw around, you need very good measurements of the speaker(s)/drive units in question.. The tools to make those measurements can cost more than the crossovers..."


surley I can just set the filters on the active X-over at the same freqs. as the passive one already fitted in the speaker?
Click to expand...

No, typically you can't, as the "crossover" in a loudspeaker also does equalization.

You need to buy a copy of Vance Dickason's "Loudspeaker Design Cookbook"... before you spend any money on an active crossover...
 
Is it really that common? I didn't realise.

I remember reading somewhere that PMC say if your speaker needs equalisation to sound right then it was not designed right anyway :p
 
Tenson said:
I remember reading somewhere that PMC say if your speaker needs equalisation to sound right then it was not designed right anyway :p
Click to expand...

You too, should buy a copy of Vance Dickason's "Loudspeaker Design Cookbook"... then you'd know whether PMC are talking bollocks or not.

That reminds me,"Bullock on Boxes" is worth having too.
 


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