DCX2496 XO advice for a noob. - diyAudio
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Old 24th August 2011, 09:43 PM   #1
Docks is offline Docks  Canada
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Default DCX2496 XO advice for a noob.

I'm looking to build a pretty high end speaker. Each woofer will be in its own cabinet and will also use a sealed LMS5400 subwoofer with a Q of 0.6.
I want to use a first order crossover with my dcx2496
I would really like to use the ScanSpeak d3004-66200 as it has a very flat response and lower THD. I've also read good things about the illuminator woofers.
The LMS 5400 is flat to around 200hz and the 66200 is flat to around 1kish. Will I end up having to use 2 different size woofers on top of the tweeter and sub to make this a usable 1st order speaker? OR is this possible to do with 1 mid woofer. I really dont want to push the tweeter too low.
Do active crossovers still produce the phase and time shift that passive ones do when using 2nd or 3rd order?

Please suggest a woofer (or 2 if needed) and where i should be crossing it over. I really would prefer a scanspeak illuminator though.

Thanks.

Last edited by Docks; 24th August 2011 at 09:56 PM.
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Old 24th August 2011, 10:28 PM   #2
Pano is offline Pano  United States
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Active filters produce the same phase shifts as (ideal) passive crossovers. It's not something to worry too much about.
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Old 25th August 2011, 08:50 AM   #3
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Don't know about this particular xover but digital ones can be linear phase ie no phase shift at all.
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Old 25th August 2011, 09:31 PM   #4
Docks is offline Docks  Canada
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Does anyone know if the DCX2496 has a linear phase response?
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Old 25th August 2011, 09:51 PM   #5
terry j is offline terry j  Australia
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no, the usual LR etc. Actually, don't know what they are, but not linear phase
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Old 25th August 2011, 09:52 PM   #6
Pano is offline Pano  United States
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The DCX has exactly the phase shift that a textbook filter has. Whatever order or slope. As if it were made with perfect analog parts.

It does not correct phase over frequency, the way some sophisticated software filters can.
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