Ashly Protea 3.24CL Betriebshandbuch - Seite 6

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Ashly Protea 3.24CL Betriebshandbuch
Operating Manual - PROTEA SYSTEM II 3.24CL Crossover / System Processor

4.6 Audio Functions

4.6a Gain
Input and Output Gain are
separately adjustable from -40dB to
+12dB in 0.1dB increments.
The output gain menu also pro-
vides for selection of input source(s)
for a given output channel, as well as
polarity of the outgoing signal. Input
signal sources are A, B, C, A+B, all three
inputs combined, or no input (Off).
Keep in mind that two signals which
share significant content, such as a ste-
reo source, will be up to 6dB louder
when combined.
4.6b EQ
The Protea 3.24CL EQ section
offers full parametric EQ as well as 1st
and 2nd order shelving filters on in-
puts and outputs. Each input channel
has six selectable EQ filters, while each
output channel has four selectable EQ
filters. In all cases, each filter is se-
lectable between parametric (PEQ), 1st
order Low Shelf (LS1), 2nd order Low
Shelf (LS2), 1st order High Shelf (HS1),
and 2nd order High Shelf (HS2).
Shelving EQ filters: 1st order filters
use a gentle 6dB per octave slope, while 2nd
order filters use a 12dB per octave slope for
more a pronounced boost or cut. All shelving
filters have a boost/cut range of +/-15dB. Low
shelving filters have a frequency range from
19.7Hz through 2kHz, and the high shelving
filters range from 3.886kHz through 21.9kHz.
Shelving filters are most useful as broad tone
controls to boost or cut the high end or low
end of an audio signal's frequency content.
Because they affect a wider spectrum of au-
dio, they are not as suitable for feedback con-
trol as parametric filters.
6
Low Shelf
+20dB
+10dB
0dB
-10dB
-20dB
-30dB
20Hz
200Hz
3.24CL Shelving Filters
1st Order Filter
2nd Order Filter
High Shelf
2KHz
20KHz