Telex DN9848 Loudspeaker Processor, DOC02-DN9848 6.2.6High Pass and Low Pass Filters Pages 6 and

Output Channels

To apply a 1st order phase adjustment in relation to a chosen frequency

1Step to the All-Pass page shown right.

2Turn the right-hand knob to enable a 1st (90º) order shift.

3Turn the left-hand knob to the required frequency.

To apply a ‘shaped’ phase transition at a chosen frequency

1Step to the All-Pass page.

2Turn the right-hand knob to enable a 2nd (180º) order shift.

3Turn the centre knob to select the Q (slope) and the left-hand knob to select the frequency.

6.2.6High Pass and Low Pass Filters (Pages 6 and 7)

The DN9848 provides the following high and low pass filter (HPF and LPF) options for cross-over purposes:

Butterworth	6, 12, 18, 24, 36 and 48dB / Octave
Bessel	12, 18, 24, 36 and 48dB / Octave
Linkwitz Riley	12 and 24dB / Octave
Peaking (HPF only)	12 and 24dB / Octave 0-6dB Gain
Bypass	No Filter

To add a high/low pass filter to output processing

1Step to the HPF or LPF page, as required (see right).

2Use the left-hand knob to specify the cut-off frequency.

3Use the centre knob to select the filter type and the right-hand knob to set the slope/gain. (The right- hand parameter switches between slope and gain, dependent on the filter type).

To bypass the high/low pass filter processing

1Step to the HPF or LPF page, as required.

2Turn the centre knob anti-clockwise to ‘Bypass’. The last selected values for each type of filter are retained in the background for easy recall.

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