FBT QUBE SP27 - Manual (Page 37)

Low/High Pass Variable 'Q' Filter (Low Pass shown)
InA Input A LPF:1~~\
1k00Hz Q=3.0 LPF VarQ
Remember – to change filter types, press to
bypass the filter, and then use to select the filter
type.
The low and high pass variable 'Q' filters have
adjustable frequency and 'Q' (or Bandwidth) controls.
The 'Q' control adjust the damping of the filter, so that
low 'Q' settings show less overshoot at the turnover
frequency, but also slower roll-off.
Remember that 'Q' is 1/Bandwidth, so the higher the 'Q',
the lower the Bandwidth, and the smaller the range of
frequencies affected. The filter is primarily 12dB/Octave,
but in achieving this sort of roll-off with a high 'Q' value will result in quite a large overshoot in level at the
turnover frequency. This type of filter is often also called a resonant filter.
BYPASS
ENTER
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