Sonnex™ Multiroom Audio System Crestron SWAMP(I)-24X8
Wiring Diagram: Passive Subwoofer Using Bridged Output
SUB
-
+
RIGHTLEFT
+
-
+
-
STEREO PAIR
BUSSED
BRIDGED
ROOM
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.
A 4
th
order crossover filter offers better performance while the 2
nd
order
crossover filer uses fewer resources (one eq for each zone instead of two).
The 2
nd
order filters have a 40 dB/decade (or 12 dB/octave) slope, while 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.
•
To use a 2
nd
order crossover filter:
⇒ Create a low pass filter on the subwoofer zone.
a.
Set the filter frequency to the desired crossover frequency.
b.
Set the filter bandwidth to 1.9.
⇒ Create a high pass filter on the left-right stereo pair zone.
a.
Set the filter frequency to the desired crossover frequency.
b.
Set the filter bandwidth to 1.9.
• To use a 4
th
order crossover filter:
⇒
Create two low pass filters on the subwoofer zone.
a.
Set both filters frequency to the desired crossover frequency.
b.
Set both filters bandwidth to 1.9.
⇒ Create two high pass filters on the left-right stereo pair zone.
c.
Set both filters frequency to the desired crossover frequency.
d.
Set both filters bandwidth to 1.9.
3.
Use Sonnex Tools or the SWAMP-24X8’s Installer Mode 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.
22 • Sonnex™ Multiroom Audio System: SWAMP(I)-24X8 Operations & Installation Guide – DOC. 7049B
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