Using Only Piezo P12; Handling Acoustic Feedback Tips P12 - Vintage Revolution Acoustic Box II Owner's Manual

Piezo, Feedback, In-ear
Using only piezo
A. Increase the LEVEL of Ch1 untill you have a good audible volume.
B. Set the EQ1 knob to 15 o'clock and search with the corresponding frequen-
cy knob for the most unpleasant frequency. If you are using a piezo it should
be between 12 and 15 o'clock.
remove it untill the sound is more natural. In most cases placing the EQ1 knob
at 9 o'clock will do the job.
C. Keep the Level of Ch2 to minimum since you will not use this channel.
D. Adjust your Low - Mid - High from the three band parametric EQ control of
the blended signal to bring the sound to the desired shape.
Handling acoustic feedback tips.
Audio feedback is a special kind of positive feedback which occurs when a
sound loop exists between your mic and the AMP or PA speaker.
The two major parameters that determine the amount of feedback are:
A. the distance from your cabinet/monitor and
B. the volume of your mic.
There are two main frequencies that are most sensitive to feedback. The first
area is the LOW-LOW MID (100Hz-250Hz) and the second area is the MID area
(400Hz-1.5KHz). For the LOW-LOW MID area the NOTCH filter is a perfect solu-
tion. For the MID area you can use the low pass shelving button (
EQ2 knob.
By changing the phase of the blended channel (ALL switch) you virtually
move your instrument in to another physical location and therefore you
change the feedback settings.
Once you are there, use the EQ1 knob to
)and the
On stage In-ear Monitoring
You can use your Abox II auxiliary input and headphones output for on stage
in-ear monitoring.
Ask the sound engineer to send a mix to your Auxiliary input and use the Head-
phones out for your own monitoring. The signal on XLR L+R and AMP outputs is
clean (will not include the signal of the Auxiliary input).
Backtrack Rehearsal
You can use your Abox II auxiliary input and headphones for backtrack re-
hearsal. Connect your auxiliary input min jack to your phone/Ipad/Mp3 player
and play our track. Adjust via XLR L+R the level your instrument and enjoy the
practice.
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