Specifications

Crestron SWAMP(I)-24X8 Sonnex Multiroom Audio System
Operations Guide – DOC. 7049D Sonnex Multiroom Audio System: SWAMP(I)-24X8
•
23
Wiring Diagram: Passive Subwoofer Using Bridged Output
BRIDGED
BUSSED
+
-
SUB
ROOM
LEFT RIGHT
STEREO PAIR
+
-
+
-
1. Connect the speakers and subwoofer as shown in one of the previous
diagrams.
2. The SWAMP-24X8 can use a 2
nd
or 4
th
order crossover filter to separate the
audio signals between the subwoofer and the left-right stereo pair speakers.
The 2
nd
order filters have a 40 dB/decade (or 12 dB/octave) slope, while the
4
th
order filters have an 80 dB/decade (or 24 dB/octave) slope.
Use Sonnex Tools’ parametric equalizer to configure a 2
nd
or 4
th
order
crossover filter. For more information, refer to the Sonnex Tools help file.
• Use a 2
nd
order crossover filter:
a. Create a low pass filter on the subwoofer zone.
i. Set the filter frequency to the desired crossover frequency.
ii. Set the filter bandwidth to 1.9.
b. Create a high pass filter on the left-right stereo pair zone.
i. Set the filter frequency to the desired crossover frequency.
ii. Set the filter bandwidth to 1.9.
• Use a 4th order crossover filter:
a. Create two low pass filters on the subwoofer zone.
i. Set both filters to the same crossover frequency.
ii. Set each filter’s bandwidth to 1.9.
b. Create two high pass filters on the left-right stereo pair zone.
i. Set both filters to the same crossover frequency.
ii. Set each filter’s bandwidth to 1.9.
3. Use Sonnex Tools or the SWAMP-24X8’s “Installer Mode” menu to bus
the outputs together. If using a bridged subwoofer, use Sonnex Tools or the
SWAMP-24X8’s “Installer Mode” menu to bridge the subwoofer outputs.
For more information, refer to “Set Bus Assignment” on page 31, “Bridge
Outputs” which starts on page 33, or the Sonnex Tools help file.