Filter
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11
OPERATION
(The GAIN button will now select only the Output channels; the gain adjustment
screens for the Inputs will not be displayed unless you use the BACK/NEXT but-
tons or exit the menu and start again.) Each Output will have both a number and
name displayed. The names are taken from a default list with labels such as
Low, Mid, Highs, Sub, etc.
An alternate method is to program a single parameter for Output 1, such as
DELAY, then press the GAIN button to go to each of the Output channels in turn
and program the delay parameter for that channel. Now select the next param-
eter and program that for each of the outputs in sequence. In some cases this
may make it easier to keep track of the comparative values between outputs.
For simplification, we will follow though programming all the parameters for a
single output.
Set the Gain for Output 1. Range is –40 dB to + 6 dB
7.6.1.3 Polarity:
Set the polarity for Output 1. Switching this will change the phase of the signal
180 degrees. If Outputs are linked, reversing the polarity of one of the linked
channels will also reverse the polarity of the other linked channel.
7.6.1.4 Delay:
Set the Delay time for Output 1. Delay is used to align drivers in a stack that
may be in different vertical planes or multiple speaker in a stack. Delay range
is 0ms to 7ms selectable in .1 ms increments. The delay is displayed in millisec-
onds, meters and feet.
NOTE: Though there are some variables, generally speaking the speed of sound
in 71 degree Fahrenheit dry air at sea level is ~773miles per hour.This is ~345
meters per second and about 1.13 feet per millisecond. .5 milliseconds equates
to about 6.78 inches. .1 milliseconds equates to about 1.36”. The DS48 displays
1ms = 343mm = 1.1ft.
7.6.1.5 HPF:
This is part of the crossover function. Sets the "knee" (corner frequency) and
filter slope type for the HiPass Filter (HPF). Frequencies below the selected fre-
quency will be filtered by the selected filter type and slope. Rotate the FREQ
knob to select the frequency and the Q knob to select the filter type.
7.6.1.6 LPF:
Set the "knee" (corner frequency) and filter slope type for the LoPass Filter
(LPF). Frequencies above the selected frequency will be filtered by the selected