In Case Of Problems - PSB Speakers PSB SubSeries 500 Guide D'utilisation

X. In Case of Problems
Symptom
No sound/power
indicator not lit.
No sound/power
indicator remains red.
Sounds distorted
Hum
Action
Ensure the main power switch is toggled to the "power" position.
This switch is located at the back of the subwoofer.
Ensure the power cord is connected to the subwoofer and
plugged into a live AC outlet.
Check the main fuse located in the power cord socket and
replace as required. If the new fuse also blows, the subwoofer
amplifier requires service.
Ensure the subwoofer's volume control is NOT in the minimum
counterclockwise position.
All PSB subwoofers utilize signal sensing auto on/off circuitry. If
no signal is sent to the subwoofer, it will not power up and the
front panel power indicator will remain red. When using the
subwoofer output of a receiver or processor, no signal may be
immediately present in this output. The subwoofer will only
power up when bass appears at the subwoofer input.
If the low level cable or speaker cable connection is poor or has
been severed, the subwoofer will not power up. Swap cables to
determine if this is the source of the problem.
To ensure the problem is not associated with the subwoofer,
rapidly disconnect and connect the subwoofer low level or high
level input. If the subwoofer power indicator then illuminates, the
receiver/processor/amp may not be sending a signal to the
subwoofer. When driving the low level inputs from a subwoofer
output, ensure the receiver/processor is correctly configured to
provide signal at the subwoofer output.
Lower volume if the subwoofer begins to sound distorted to
determine if playback at a lower level solves the problem. If a
slight reduction in level solves the problem, were you being
realistic in your subwoofer level setting? If the distorted sound
remains at a low level, one or both of the woofers may be
damaged.
Hum that appears when using the subwoofer's low level input(s)
is usually caused by using an inferior, damaged, exceptionally
long low level cable or cables routed near high current
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