active crossover with Eq Apo

[Slickaphonic]

Hello to everybody and thanks for Eq Apo,

I have started programming an active crossover with Equalizer Apo in 2014.
Notebook --> HDMI--> Denon AVR4520.
Now I have installed the latest version of equalizer apo and I have changed the subwoofer crossover management away from the receiver to Eq Apo.
All works well and sounds good.
If somebody has experience of crossover programming similar way, would be nice to discuss about it and sharing experience.
Here is a copy of my actual config file ( the config file was just finished ):

3 Channel Stereo Active Crossover

Channel Copy

Copy: SL=L RL=L
Copy: SR=R RR=R

Midwoofer Left ( Scan Speak 15W/8530K00 )

Channel: RL
Filter 1: ON LPQ Fc 2000 Hz Q 0.577
Filter 2: ON LPQ Fc 2000 Hz Q 0.577
Filter 3: ON HPQ Fc 60 Hz Q 0.577
Filter 4: ON HPQ Fc 60 Hz Q 0.577

Midwoofer Right ( Scan Speak 15W/8530K00 )

Channel: RR
Filter 1: ON LPQ Fc 2000 Hz Q 0.577
Filter 2: ON LPQ Fc 2000 Hz Q 0.577
Filter 3: ON HPQ Fc 60 Hz Q 0.577
Filter 4: ON HPQ Fc 60 Hz Q 0.577

Tweeter Left ( Vifa 10 BG 120/6 )

Channel: SL
Filter 1: ON HPQ Fc 2000 Hz Q 0.577
Filter 2: ON HPQ Fc 2000 Hz Q 0.577

Tweeter Right ( Vifa 10 BG 120/6 )

Channel: SR
Filter 1: ON HPQ Fc 2000 Hz Q 0.577
Filter 2: ON HPQ Fc 2000 Hz Q 0.577

Satellite EQ

Channel: RL SL RR SR
Include: gesamt3.txt

Channel: RR SR
Preamp: -2dB

Subwoofer ( 2*Ripol 4 woofer)

Channel: L R
Copy: L=L+R R=R+L
Filter 1: ON LPQ Fc 70 Hz Q 0.577
Filter 2: ON LPQ Fc 70 Hz Q 0.577
Filter 3: ON LPQ Fc 70 Hz Q 0.577
Filter 4: ON LPQ Fc 70 Hz Q 0.577
Filter 5: ON PK Fc 46.0 Hz Gain -15,0 dB Q 5,00
Filter 6: ON PK Fc 33.5 Hz Gain 10,0 dB Q 5,00
Filter 7: ON PK Fc 82.0 Hz Gain 8,0 dB Q 5,00
Filter 8: ON PK Fc 65.0 Hz Gain -5,0 dB Q 5,00
Filter 9: ON HPQ Fc 30 Hz Q 0.577
Preamp: -3dB

[Nathan Mai]

Hey interesting work here!

I've got a couple questions.

For the SUB. L=R+L and L=R+L... I read around the forum and people are saying the sum shouldn't be added to more than 1? so it should be L=.5R+.5L R=.5R+.5L? I'm not saying you're wrong, this is just what i've seen being recommended!

Another question is I notice that sometimes you apply the same LP/HP filter twice or in some cases 4 times with a Q of .577. Is this done to replicate a certian slope? Any chance you're trying to apply a LR2/4 (Linkwitz Riley: 12db/octave,24db/octave filter?)

Thanks!

[Slickaphonic]

Hi,

1.for a flat curve your suggestion seems correct.
As in the waterfall diagram you will see around 6db more for the sub. For me sounds better than flat, especially at low volume levels.

1. It is cascading of Bessel filters for -12db or -24db slope.
   Bessel filter are easy to cascade. For Linkwitz Riley I have to start studying the theory a bit more. Limit is my time :-)

Thanks