sds lab esl active crossover

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hi.

i have build it and it works very well. i have used opa2134 for the op amps the sound is very good, only bad thing is where is lot of compoments who have to be changed if you want another crossover frequence apart from the bom list.

ls
 
Hi,

if the crossover allows for the correct amplitude and phase response it certainly will work.
It depends on the requirements of the speakers to be used with.
A non-segmented panel will almost always require at least one notch filter for the upper mids, possible a second notch against its base resonance.
For the bass it might be wishful to allow for some bass boost or to have a subsonic filter.
As the natural acoustic roll-off of a panel and a bass will almost always differ widely, rather asymmetric electrical filters may be required.
And lastly .. will a good panel show the sonic differences between OPAmps and a well designed discrete design.
I prefer the required filter blocks to be taylored to the requirements instead of adding standard filter blocks till eventually a soso fit is reached.
Designing the filter after the speaker specs may also reduce the sheer amount of OPAmps, or transistors within the signal path.
For my panels I need a Highpass, a Bafflestep-correction and two Notches.
An output buffer included the signal in my crossover passes just three transistors!!
Sounds in my ears much better than the same filter I had built before with OPAmps.

So I suggest You check carefully if the crossover You´d like to use fulfills truely the requirements of Your speakers.
If so, proceed.
If not, look for something different.

jauu
Calvin
 
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