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Hum may be ground loop related. It may be helpful to lift the shield ground (Pin #1) on a balanced cable at the
RBN™112 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 RBN™112, 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 reduce hum.
This is a typical AC wiring/light dimmer interference problem, not a design flaw of the RBN™112.
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
RBN™112 has not been set too low. Check that the input plug is fully seated in the input jack on the rear panel of
the RBN™112. Ensure that a power amp has not been plugged into the input jack of the RBN™112. If an exten-
sion 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 RBN™112 has built-in EQ to smooth and extend the natural response of the speakers. If excessive additional
bass boost or HF boost have been added externally to the RBN™112, it could cause premature overload at high
SPL. Reduce the amount of any external (mixer, rack) EQ and see if that clears up the distortion.
If no external bass boost or HF boost has been added, but there seems to be an excessive amount of bass boost
(boominess, bass clipping, and/or treble boost (shrillness, sizzle, harshness), then you may have selected the
wrong choice on the Set-Up Wizard in the DSP menu on the LCD display. Go back and select the proper choice,
If using the RBN Sub as the main input from the mixer, and then running a cable from the Sub to the RBN™112 ,
then the RBN™112 should be set to USE WITH RBN SUB on the Set-Up Wizard menu.
If the Set-Up Wizard menu choice seems to be correct, and there is still too much boost, then try a preset with
less boost, such as the Acoustic (Flat) preset and make sure the Tone controls have not been set all the way up.
Finally, realize that even though the RBN™112 is a powerful and high output unit, it does ultimately have limits,
and it may need additional powered units (or a subwoofer) to provide enough sound output or coverage. In this
case, try turning the mixer levels down a little to see if that clears things up. If, after checking all the things listed
to check and anything else you can think of to check safely, and the system still exhibits problems, carefully note
all conditions and check with your Peavey dealer for advice.
Care and Maintenance
Your RBN™112 is a sturdy and durable product and will provide years of reliable use if properly cared for. Use
common sense and read the safety warnings to avoid hazardous operating conditions.
The unit must be disconnected from the AC power source before any work is done on it. Refer all servicing to
qualified service personnel.
Sunlight/Heat
Avoid prolonged exposure to direct sunlight, as this may cause the unit to overheat and thermally shut off.
Excessively hot operating conditions can also cause a thermal shutdown.
Do not store in extremely hot or cold conditions or extremely high humidity. Always allow unit to come to room
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