Filter
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12
OUTPUT EQUALIZERS
Select 1-8 on the top of the EQ screen.
FILTER:
Select any of the five independent filters to use.
TYPE:
Choices are: Parametric, Notch, Allpass1, Allpass2, Horn EQ, LPF-6, LPF-12, HPF-6, HPF-12, Low Shelf,
High Shelf and Bandpass. Depending on the filter selected various options for adjustment are presented in
the window.
Parametric: Frequency, BW (in oct), Level
Notch: Frequency, BW (in oct). Notch has a fixed attenuation on
minus infinity and the BW is defined 3 dB from unity.
All Pass1: Frequency
All Pass2: Frequency and Bandwidth
Horn EQ: Turnover Frequency and Level
LPF6 and HPF6: Frequency
LPF12 and HPF12: Frequency and Q
Low and High Shelf: Frequency and Level
Bandpass: Center Frequency and Bandwidth
DYNAMICS:
Inputs A B C & D or outputs 1-8 should be selected on the top of the screen. While on the top of the
screen push the data wheel and an arrow appears. Rotate the wheel to select which input or output you
wish to adjust and press the data wheel. Dynamics in the input channels may be linked in pairs for stereo
tracking on the Input pages on the Setup/Configuration screen. Most users should use the dynamics on
the outputs as Limiters to protect speakers and amplifiers and as compressors on the inputs should this
type of tonal modification be necessary.
THRESHOLD:
The threshold is adjustable in .5 dB steps from –76 dBu to
+24 dBu. This control determines the minimum level when the
compressor begins to limit the dynamic range. The compressor
has no affect on the signal as long as the signal strength is
below the threshold point. Once it passes the threshold point,
the compressor begins to limit the dynamic range of the output
according to the value set by the Ratio control.
RATIO:
The ratio determines how strong the limiting becomes once the threshold is crossed. Values of 1:1 (no
compression) to 20:1 are possible. Ratios of 10:1 and above should be selected for speaker protection.
ATTACK:
The attack function sets the amount of time for the compressor to respond once the threshold has been
crossed. Specifying this value allows the user to determine whether the compressor responds as a peak
or RMS unit as very short attack times consider only peaks while times above 50 ms average these peaks
and result in RMS response. We recommend attack times of between 50 ms - 100 ms be used when
setting the limiters to protect the speakers from being overdriven by the power amps. It is the average
power long term that causes speaker burn out. The transient peaks usually cause little damage if kept
inside the speaker’s band limits.
EQ Screen
Dynamics