Digital Crossovers

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Assuming you want to run an active system then you will need some kind of device to provide crossover duties in front of the amplifiers. There are a variety of ways that this can be done:

  • Hardware
    • Grab some opamps and build an analogue active crossover (cheap/inflexible)
    • Behringer DCX2496 (fairly cheap/flexible)
    • DEQX PDC2.6 (expensive/very flexible/includes a pre-amp)
    • TacT RCS (expensive/very flexible/includes a pre-amp)
  • Software
    • Matlab/Octave - Click here for info on how to Generate XO in Matlab
    • MaxXO - Unfinished at the time of writing
    • Waves (windows based package)
    • Various other crossover designer packages. (Several free ones). I think also lspCad can generate FIR coefficients?

If you use a software based tool then you will need some kind of convolver running on the PC to implement the crossovers. There are a variety of convolvers available either for free or at cost. Some of them are integrated into a software media player, others can take arbitrary input from the soundcard inputs and perform convolution in realtime to the output

  • Brutefir - extremely fast linux based FIR convolver
  • Tact (can be loaded with arbitrary FIR coefficients, unlike the DEQX)
  • AsioXO
  • FooBar convolver
  • ...?
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