6. Operation
VSXNET Subwoofer Operation Manual rev 2.0.0
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6.3 LED functions
On switch on all of the LED’s will illuminate instantaneously. The first to go off is the green signal LED after about
1 second. The red limit LED will flash for 5-10 seconds, this is the unit performing a self diagnostic test. During
this initial few seconds the audio is muted until the red LED stops flashing & the blue power LED is the only LED
left illuminated.
After the self diagnostic test is performed, the unit is ready to pass audio. When audio is detected the green
signal LED will illuminate. If at any time the Red LED flashes this indicates that the DSP is taking corrective action
by applying limiting to either the LF or HF channels (or both). Regular flickering of the Limit LED is perfectly
acceptable; do not allow the limit LED to stay on constantly for any sustained length of time (reduce the gain).
Fast regular flashing of the red LED indicates that the DSP is taking protective action; the input will be automatically
attenuated to avoid over driving, if this occurs the operator should reduce the input gain from the source. If the gain
is not reduced the unit will eventually be shut down by the DSP.
The blue ‘Network Find’ LED on the front of the cabinet (behind the grill) can only be illuminated by activation
from within the software interface. When activated the LED will flash intensely as an aid to locate and identify
loudspeakers connected on the network. The red limit LED on the back panel also doubles as a network find
LED duplicating the function of the blue front mounted LED.
6.4 Limiters
The limiters are carefully set-up to preserve the loudspeakers dynamic headroom by allowing short term transients
to pass; audible degradation in sound will only become apparent when the limit indication is on constantly. The
limiting functions will protect the amplifier from long term overheating by attenuating the driving voltage to the drive
units. If used irresponsibly (constant hard clipping) sound quality will be compromised. In extreme cases drive units
may also be damaged.
6.5 Audio Connections
The signal input & link connectors are fully balanced.
SIGNAL
XLR CONNECTOR
When connecting a balanced signal be sure to wire
Hot (+)
Pin 2
to the following standard:-
Cold (-)
Pin 3
Shield (GND)
Pin 1
In a standard balanced interconnection there are two signal conductors and a shield. The shield is normally
referenced to ground at one or both ends. Many times the shield is lifted at one end, usually at the input to
eliminate “ground loops” or noise. The problem with this approach is that while it may reduce hum, the shields act
as radio antennas and pickup radio frequency interference from the environment.
Multiple enclosures may be driven from a single audio source; simply plug the signal source output into the first
XLR input socket, and patch that speakers XLR link to the next speakers XLR input socket & so on.
