QSC PLD Series - Page 19

PLD Series Amplifiers 19
Application Guide—Portable PA Rev. E, Apr. 2015
Factory Preset Display Description
F17
Channels A and
B bridged for
8Ω subwoofer;
channels C and D
bridged for 8Ω full
range
This is a mono preset geared toward “subs on aux” arrangements.
• Channels A and B are bridged for use with an 8Ω subwoofer
system; their signal comes from Input 1 and has a 48 dB/oc-
tave Butterworth low-pass filter at 80 Hz.
• Channels C and D are bridged for use with a high-power 8Ω
full-range loudspeaker system; their signal comes from Input 2
and goes through a 48 dB/octave Butterworth low-pass filter
at 80 Hz.
These parameters are only a starting point; you can alter any of
them and save the configuration into a user preset.
F18
Single three-way
mode: Channels
A and B bridged
LF; channel C MF;
channel D HF
This is similar to F3, with these additions:
• Channels A and B are bridged, with a 48 dB/octave Butter-
worth low-pass filter at 400 Hz.
• Channel C is bandpassed from 400 Hz (48 dB/octave But-
terworth high-pass) to 1.5 kHz (24 dB/octave Butterworth
low-pass).
• Channel D has a high-pass filter at 1.5 kHz (48 dB/octave
Butterworth).
• All the channels get their signal from Input 1.
These parameters are only a starting point; you can alter any of
them and save the configuration into a user preset.
F19
Channels A and
B bridged for
4–8Ω subwoofer;
channels C and
D bridged for 8Ω
subwoofer
This is similar to F6, with these additions:
• Channels A and B are bridged, with a 48 dB/octave Butter-
worth low-pass filter at 80 Hz.
• Channels C and D are bridged, with a 48 dB/octave Butter-
worth low-pass filter at 80 Hz.
These parameters are only a starting point; you can alter any of
them and save the configuration into a user preset.
F20
Channels A and
B parallel for
2–4Ω subwoofer;
channels C and D
parallel for 2–4Ω
subwoofer
This is similar to F4, with these additions:
• Channels A and B are parallel, with a 48 dB/octave Butter-
worth low-pass filter at 80 Hz.
• Channels C and D are parallel, with a 48 dB/octave Butter-
worth low-pass filter at 80 Hz.
These parameters are only a starting point; you can alter any of
them and save the configuration into a user preset.