Dynacord DSP 244 owner manual Channel EQ1-4

P A R A M E T E R S

CHANNEL EQ1-4

The four output channels of the DSP 244 employ a 4-band parametric EQ each which allow to program additional equalization for the individual frequency ranges. This guarantees the optimum frequency response that is matched to the connected loudspeaker components.

	Parameter		Settings / Value range	Default
Type			BYPASS, PEQ, LOSLV, HISLV, HIPASS, LOPASS,	BYPASS
			ALLPASS
		f	20Hz - 20kHz	1.00 kHz
PEQ		Q	0.4 - 20.0	0.7
		Gain	-12dB - +12dB	+0dB
		f	20Hz - 20kHz	1.00 kHz
LOSLV		Slope	6dB, 12dB	6 dB
		Gain	-12dB - +12dB	+0dB
		f	20Hz - 20kHz	1.00 kHz
HISLV		Slope	6dB, 12dB	6 dB
		Gain	-12dB - +12dB	+0dB
		f	20Hz - 20kHz	1.00 kHz
LOPASS		Slope	6dB, 12dB	6 dB
		Q	0.4 - 2.0 (for 12dB/octave slope only)	0.7
		f	20Hz - 20kHz	1.00 kHz
HIPASS		Slope	6dB, 12dB	6 dB
		Q	0.4 - 2.0 (for 12dB/octave slope only)	0.7
		f	20Hz - 20kHz	1.00 kHz
ALLPASS		Order	1st, 2nd	1st
		Q	0.4 - 2.0	0.7

Type describes the selected filter type. When selecting BYPASS, no effect is applied. PEQ provides a parametric Peak Dip Filter with programmable frequency, quality, and gain. LOSLV / HISLV stand for Low Shelving or High Shelving Equalizer, respectively. Their parameters are: frequency (f), slope, and gain. The parameters of the LOPASS / HIPASS filters are frequency and slope. The ALLPASS filter can be used to compensate phase differences at the x-over frequency.

f (frequency) sets the center-frequency of parametric EQ-types and the cutoff frequency of shelving and Hi-Pass / Lo-Pass filters. With the Allpass filter this is the frequency at which the phase is shifted by 90° (1st order Allpass) or by 180° (2nd order Allpass).

The value of the parameter Q determines the quality or bandwidth of parametric EQs. Higher Q-values result in a narrow banded filter while smaller Q-values result in a wider bandwidth.

The Q-parameter also describes the quality and therefore the graph of the Hi-Pass and Lo-Pass filters.

The Q-parameter is also found in the 2nd order Allpass filter. It is used to set the phase response in the transition band (lower Q-settings result in flat phase response while higher Q-settings produce a steeper phase response; see also examples).

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