I just bought my first powered sub and even when I have it's crossover set to the lowest freq it is infringing on the low region of my main woofer creating a peak. I've been looking for a filter design I could use to restrict the sub but can't seem to find the right circuit.
In the attached drawing I tried to show what I am hearing when running a freq sweep from 20 to 100 hz. The amplitude is kind of ambiguous but basically the bottom line is when the signal is clearly audible and the top line is when the drivers seem to be at their full ouput for the signal level.
The drawing shows the sub starting up at 20hz and reaching full ouput at 29 hz, staying at that level until 55hz and then dropping to 68hz. The main woofer starts out at 30, rises to full output at 45 and then maintains that level.
This gives us a big overlap particularly in the 45 to 55 hz region and I can clearly hear this peak when I do the sweep with both driveres connected.
It seems I'm looking for a filter for the sub to create a drop-off similar to the dashed line I drew.
Input to the filter would be from my pre-amp output (300ohm source impedence). Output of the filter would connect to powered sub speaker level input with 150k load impedence.
Can anyone give some guidance as to what kind of filter I'm looking for here. Schematics or links welcome. Passive or active is OK, whichever will work best.
thanks in advance for any help
Preamp is Aikido
Main speaker: Martin Logan Electromotion esl
sub: REL T5
In the attached drawing I tried to show what I am hearing when running a freq sweep from 20 to 100 hz. The amplitude is kind of ambiguous but basically the bottom line is when the signal is clearly audible and the top line is when the drivers seem to be at their full ouput for the signal level.
The drawing shows the sub starting up at 20hz and reaching full ouput at 29 hz, staying at that level until 55hz and then dropping to 68hz. The main woofer starts out at 30, rises to full output at 45 and then maintains that level.
This gives us a big overlap particularly in the 45 to 55 hz region and I can clearly hear this peak when I do the sweep with both driveres connected.
It seems I'm looking for a filter for the sub to create a drop-off similar to the dashed line I drew.
Input to the filter would be from my pre-amp output (300ohm source impedence). Output of the filter would connect to powered sub speaker level input with 150k load impedence.
Can anyone give some guidance as to what kind of filter I'm looking for here. Schematics or links welcome. Passive or active is OK, whichever will work best.
thanks in advance for any help
Preamp is Aikido
Main speaker: Martin Logan Electromotion esl
sub: REL T5
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