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TA-500 user manual
High and Low Pass Filters
Out1 Freq Shape
LPF 2.50k LR24
Knob A: Frequency, <<out, 10.0Hz to 25.6kHz, out>>
Knob B: high pass filter type
Filter type is selectable from Butterworth, Bessel, Linkwitz-Riley and Hardman. Filter slopes of
up to 8th order or 48dB / octave are provided. Not all filter types are available in all slopes.
For example 18dB / octave Linkwitz-Riley filters do not exist.
The Hardman type filter is always described by its’ order as the filter becomes progressively
steeper rather than following a linear slope so a dB/octave description is not accurate.