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Troubleshooting
No Output at All
First, make sure the unit has AC power and is turned ON. Make sure the LCD screen on the power amp module
is illuminated.
If not, make certain the ON/OFF switch (1) is in the ON position and check the IEC power cord connection (3)
by ensuring it is fully engaged and seated. Make certain the AC line cord is plugged into a working AC outlet.
Finally, check the fuse (2). (See the Rear Panel: FUSE section, for safety instructions.)
Once assured your unit is getting AC power, check that the SP® 118P Sub is getting a signal. Temporarily discon-
nect the cable running to its inputs and connect it to some other device capable of reproducing the signal (i.e., a
power amp and speaker). If this produces a signal, make sure that all Level controls being used have been turned
up to a satisfactory level (one-third to halfway).
If the SP® 118P Sub has been subjected to direct sunlight or excessive heat, the built-in thermal protection may
have been triggered. If so, turn off the SP® 118P Sub and let it cool for a sufficient amount of time.
If there is still no output, contact your authorized Peavey dealer or the Peavey International Service Center.
Hum or Buzz
If the SP® 118P Sub is producing a hum or buzz, this can be AC outlet related. Try plugging the SP® 118P Sub into
a different AC outlet. Sometimes, if a different circuit (breaker) is used for the mixer and for the SP® 118P Sub,
it can cause hum problems. Unless it is not practical, it is best to use the same wall outlet (breaker) to supply
power to both the mixer and the powered speaker.
Ensure that shielded cables have been used to route the signal to the SP® 118P Sub input. If speaker cables with
1/4" plugs are used as input cables instead of shielded cables, they will be prone to hum or buzz.
Hum may be ground loop related. It may be helpful to lift the shield ground (Pin #1) on a balanced cable at the
SP® 118P Sub end. Check any input changes carefully by first turning down the Level control, before plugging
and unplugging cables, or lifting the shield ground at the speaker end.
Check to make sure light dimmers are not on the same circuit as the SP® 118P Sub, the mixer or any source
devices. If light dimmers are used, then it may be necessary to turn them full ON or full OFF to eliminate or re-
duce hum. This is a typical AC wiring/light dimmer interference problem, not a design flaw of the SP® 118P Sub.
The third wire (ground plug) on the AC plug should NEVER be removed or broken off, as this is a potential
safety hazard.
Distorted or Fuzzy Sound
First, ensure the mixer (signal source) is not clipping or being overdriven. Make sure the Gain (6) control on the
SP® 118P Sub has not been set too low. Check that the input plug is fully seated in the input jack on the rear pan-
el of the SP® 118P Sub. Ensure that a power amp has not been plugged into the input jack of the SP® 118P Sub. If
an extension cord is being used to provide the AC power to the unit, insure that it is of sufficient current capacity
and that it is not also being used to supply power to any other device.
The SP® 118P Sub has built-in EQ to smooth and extend the natural response of the speakers. If excessive addi-
tional bass boost have been added externally to the SP® 118P Sub, it could cause premature overload at high SPL.
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