mi niDSP Ltd, Hong Kong /
/ Features and speci fi cations subject to change wi thout pri or noti ce
39
Filter type
Selects the type and slope of the filter. The steeper the slope, the more quick ly frequencies
above or below the cutoff frequency are attenuated. There are three types of filter:
Butterworth (BW)
Available in 6, 12, 18, 24, 30, 36, 42, and 48 dB/octave, Butterworth crossover
filters are 3 dB down at the cutoff frequency.
Linkwitz-Riley (LR)
Available in 12, 24, and 48 dB/octave, Linkwitz-Riley crossover filters are 6 dB
down at the cutoff frequency.
Bessel
Available in 12 dB/octave only, a Bessel filter gives a more gradual roll -off
through the crossover region.
Bypass
Clicking on the Bypass button disables that high pass or low pass filter. (The other filter is still
active, unless specifically bypassed also.)
5.3
FIR
FILTERING AND DESIGN
(FIR
PLUGIN ONLY
)
Each output channel of the PWR-ICE2-2x2-FIR (FIR plugin) has an FIR filter that can be used for driver correction
and crossover. The filter banks are asymmetrical (they have different numbers of taps – see next page). FIR
filtering allows construction of complex arbitrary equalization and crossover filters with independent control of
amplitude and phase. The parameters of each FIR filter are set in the FIR settings window:
