dbx Pro 4820, 4800 manual Output Bandpass Filter/Crossover

DriveRack® Detailed Parameters Section 6

6.8 - Output Bandpass Filter/Crossover

The DriveRack 4800/4820 provides a Bandpass Filter on each output channel. These filters can be con- figured as Crossovers so you can adjust the frequency content of the adjacent output channels.

Band Select switch

This selects the specific band or channel to be adjusted.

Highpass (HiPass) fader

This adjusts the lowest frequency that the output channel will be able to achieve. The range of this control is between “Out” to 20kHz, where “Out” denotes that the filter is not in the signal path and is not active.

Lowpass (LoPass) fader

This adjusts the highest frequency that the output channel will be able to achieve. The range of this con- trol is between 20 Hz and “Out”, where “Out” denotes that the filter is not in the signal path and is not active.

Gain fader

This sets the gain of the Crossover output and is adjustable between -Inf and 20dB.

Lowpass and Highpass Slope switch

This selects the desired slope and filter topology. It offers the following filter topologies and slopes:

Bessel 6, 12, 18, 24, 36, 48 dB/Octave

Butterworth 6, 12, 18, 24, 36, 48 dB/Octave

Likwitz-Riley 12, 24, 36, 48 dB/Octave

Polarity switch

This switches between Positive (+) and Negative (-) Polarity.

Phase switch

This switch makes the Phase adjustment available on the GUI; it is only available on the GUI.

Phase fader

This fader allows adjustment of the Phase in 5 degree steps and can be adjusted from 0 to -175 degrees.

Show Composite button

Only available on the GUI, this button provides a composite view of the Output Parametric and Bandpass filtering on the channel. If Window Recycling is turned on it is a convenient way to “jump” back and forth between the Composite and filter views (Bandpass and Parametric) while making changes.

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DriveRack® 4800/4820 User Manual 47