There are 64 filters total within the I-Tech DSP and they can be placed anywhere within the system. In addition to filtering,each possesses up to +/-24dB of gain.
The following filters are available:
Lowpass::Bessel 2-4,Butterworth1-4,and Linkwitz-Riley 4
Highpass:Bessel 2-4,Butterworth1-4,and Linkwitz-Riley 4
Lowshelf::Low-frequency shelving EQ
Highshelf:High-frequency shelving EQ
Lowpass EQ:Variable Q from 0.1 to 35
Highpass EQ:Variable Q from 0.1 to 35
Parametric EQ:Variable Q from 0.1 to 35
All Pass:1st and 2nd order
All Pass filters provide no gain change to the output, but provide a phase change at the selected frequency. This corrects the phase relationship of the output without a gain reduction, such as is found in other filters.