Peavey PVX pSub Operating Manual page 26

Sometimes, with difficult interference problems, it will be helpful to lift the shield ground ( Pin #1 of an XLR)
of a balanced cable at the PVX
(10) built into the PVXp Sub. Check any input changes carefully, always turning the Level control down before
plugging and unplugging cables, or lifting the ground.
Use of high quality, premium cables is recommended for the PVX
and materials and will provide greater long-term reliability. The best option is a shielded balanced cable no
longer than necessary to reach the PVXp Sub. It is usually a good idea to leave some slack at the input to the
PVXp Sub and also to tape the cables down or run them under a cable guard, to avoid anyone tripping over them
or pulling the PVXp Sub over when it is holding a speaker on top of it's pole.
LEVEL CONTROL ADJUSTMENT
The PVXp Sub is equipped with a Level control (6) on the input to facilitate use in many different applications.
With the Level control adjusted fully clockwise, gain is at maximum and the input sensitivity is 0.24 V RMS for
full-rated output.
It is recommended that the PVXp Sub Level control be set close to 12 o'clock position, or 0 dB preamp gain. At
this setting, the input sensitivity is approximately 2.4 volts RMS for full-rated output. The PVXp Sub will now
more closely match a typical power amp input.
If the mixing board indicates clipping of its output signals, then all of the PVXp Sub power capability is not
being utilized cleanly. Clipping the signal before it gets to the PVXp Sub is not optimal. Reduce the mixer
output level and turn up the Level control on the PVXp Sub.
The amplifier in the PVXp Sub is equipped with DDT
has engaged. If the sound seems heavily compressed, check these indicators; if it is blinking RED more than
occasionally, then the drive level from the mixer (or the Level control on the PVXp Sub) needs to be reduced.
When first turning on the sound system, switch on all upstream electronics first, then the PVXp Sub with its
Level control fully counterclockwise (all the way down). Begin checking levels with the mixer output level
controls all the way down, and bring them up slowly with the PVXp Sub Level control set to the desired setting
(one-half way up recommended to start).
It is not good practice to turn the Level control on the PVXp Sub all the way up and then try to control level only
from the mixer, this approach would tend to pick up excess noise. Best practice would be to run a "hot" signal
from the mixer down the cable to the PVXp Sub, and then turn the PVXp Sub Level control up only as much
as necessary to reach full desired output. With this approach, it is necessary to verify the mixer output is not
clipping.
CABLES FROM THE HIGH PASS OUTPUTS (11 & 12)
The preferred method of connecting a full-range satellite speaker system to the PVXp Sub's High Pass Outputs
(11 & 12), is to use a balanced XLR cable no longer than necessary to comfortably reach the satellite speaker
system.
If the satellite speaker is on top of a pole above the PVXp Sub, then a 6 foot cable will be plenty long. A 10,
or 20 foot cable could also be used, but cables longer than that will only allow more interference pickup, and
start to lose high-frequency information. Use of high quality, premium cables is recommended for the PVXp
Sub, as these usually have better shielding and materials and will provide greater long-term reliability. . It is
usually a good idea to leave some slack at the output of the PVXp Sub, and also to tape the cables down or run
them under a cable guard to avoid anyone tripping over them or pulling the PVXp Sub over when it is holding a
speaker on top of it's pole.
RECOMMENDED SETTINGS FOR USE OF THE PVXp SUB WITH THE PVXp SERIES POWERED
SPEAKERS
The ideal location for placement of the powered PVX
pole. In that close proximity, the following settings will provide the best results in the crossover region, and for
tonal balance.
Note that the XLR outputs (11 & 12), have been padded 12 dB to allow the XLR inputs on the PVXp 12 and PVXp
15 to be used. Normally, these are considered the mic level inputs, but with the PVXp Sub outputs padded, the
usage of the XLR inputs on the PVXp powered speakers is possible.
p Sub end. This can be done quite easily, by activating the Ground Lift switch
™
™
and the LED indicator will show when PVXp Sub DDT
™
p
™ p Sub, as these usually have better shielding
series full-range speakers is on top of the PVXp Sub