Bass And Treble Controls; Power Led; Troubleshooting - Viking PA-250-IP Product Manual

E. Bass and Treble Controls
Front panel BASS and TREBLE controls are provided to adjust the paging tonality. Since lower frequencies require
higher power, turning the bass down can allow increased paging volume levels. Turning up the treble can increase
paging intelligibility.
F. Master Volume Control and Peak Limiter
The front panel MASTER VOLUME control adjusts the volume coming from all inputs.
The PA-250-IP has an integrated Peak Limiter feature that reduces the audio signal peaks by 4dB. Since audio signals
are highly dynamic in nature, this feature allows the average volume level of pages to be 4dB louder than normal before
clipping distortion occurs. The MASTER VOLUME LED blinks on when peak limiting is engaging. If maximum volume
levels are desired, turn up the MASTER VOLUME control until the MASTER VOLUME LED starts blinking a bit during
pages. Then use the 70V speaker taps to adjust the volume of each paging speaker, keeping in mind to NOT go over
a total of 250 Watt accumulative load.
G. Power LED
The front panel POWER LED serves two purposes. It will light steady a few seconds after the unit is powered up showing
power is applied. Second, it will momentarily wink showing when the power amplifier is going into current limiting. If
current limiting is observed, here is a list of suggested actions:
Step 1 Turn down the input level of the specific input that is pushing it into current limiting.
Step 2 Turn down the MASTER VOLUME level.
Step 3 Turn down the BASS level.
Step 4 Reduce the number of speakers connected to the PA-250-IP.
Step 5 Reduce the power tap settings of the connected speakers.
If the unit cannot register with the programmed SIP server, the Status LED will blink on and off every
second until communication is restored. This alerts a potential user of a problem with the device that
will prevent a page from being made.

Troubleshooting

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