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Adding a subwoofer

Nik
2016-03-08
2016-03-28
  • Nik

    Nik - 2016-03-08

    Hello,

    I have a 7.1 sound card and now I want to add a subwoofer to my stereo speakers, but I don't understand very well how to separate the outputs to set up a crossover with Eq APO...

    Thank you.

     
  • Jonas Dahlinger

    Jonas Dahlinger - 2016-03-28

    Normally, you would use your AV receiver or sound card driver's bass redirection functionality for this.

    Anyway, a cross over using E-APO could look like this:

    Copy: SUB=0.5*L+0.5*R
    Channel: SUB
    Filter: ON LP Fc 80 Hz
    Channel: L R
    Filter: ON HP Fc 80 Hz
    

    This would create a crossover with a corner frequency of 80 Hz and is only meant for stereo input. Note that there is software that will just use the available channels on your sound card to determine how to output audio and might thus send audio to the center and rear/side channels which you do not have. It is therefore not easy to correctly do such a setup. On the software side it is much easier to just have a full 5.1/7.1 setup or let an amplifier/AV receiver do the redirection while only having stereo output from the sound card.

     

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