Vortex Media VTX 1000 - Manual (Page 72)

Output Filters
Since we have the SoundStation VTX 1000's subwoofer in the system design, we need to use filters to
direct the energy of the incoming signal to the appropriate loudspeakers. Since the subwoofer is designed
to handle low frequency energy, a Linkwitz-Riley low pass filter has been assigned to Output D. The cutoff
frequency is 250 Hertz, meaning that above that frequency, the signal will be attenuated at a rate of 12 dB /
octave.
72