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Example Signal Processor Help Sheet:
I. DriveRack PA (Left/Right Clusters)
1.This is the crossover for the Left/Right speakers, which are
biamped with crossover at 500Hz. It also has a mono subwoofer
output that feeds the next DriveRack which has its own crossover
filter. Use program #F2 (3 Way w/mSub), section 5.2.
2.The QRx153 speakers have a fairly flat frequency response
so minimal equalization is needed.
3.Since the Left/Right are mainly for music, not voice, there is
little need for feedback suppression (AFS) which can degrade the
quality of music. However, AFS can be added if necessary.
4.Moderate compression is used, although more can be added
at the mixer for uneven guitars/etc.:
OverEasy=7, Threshold= -10, Ratio=2:1, Gain=0, Auto=On
5.Limiting is set to 0 dBu (0.775V) on the high range speakers,
which corresponds to the PLX1202 amplifier output
of 150W per channel. Limiting is set to +5dBu (1.36V) for the
low range speakers, which corresponds to the PLX2402
amplifier output of 400W per channel.
II. DriveRack 260 (Center Cluster and Gym/Bleachers)
1.This is the crossover for the Center speakers, which is set
to 500 Hz. It also does the mono subwoofer crossover at 120 Hz,
which includes A+B summing to bring in the Left/Right sub feed.
Use program 1x4 w/ 2 Zones, section 7.4. The center cluster has 4
Horns in 2 groups: Upper+Lower and Left+Right. The Left+Right
horns (programmed as Mid, but really High) cover most of the
seating area, so the Upper+Lower horns are turned down and
crossed over High to minimize hot spots.
2.Equalization is needed to flatten the frequency response.
The RTA function can be used to tweak the equalization.
3.Since the Center is mainly for voice, not music, feedback
suppression (AFS) is set to:
On, Low Music, Fixed=0, Lift=On, After=20min
Some of the filters may be changed to Fixed during each
pre-performance sound check for improved feedback
suppression.
4.Medium compression is used, although more can be added
at the mixer for uneven speakers/singers:
OverEasy=3, Threshold= -20, Ratio=2:1, Gain=0, Auto=On
5.Limiting depends on speaker impedance, which can be either
8 or 16 ohms for the DH1A. If they are 16 ohms each, then
two will be connected in parallel for a total of 8 ohms. If
they are 8 ohms each, then two will be connected in series
for a total of 16 ohms. For 8 ohms total: Limiting is set to 0dBu
(0.775V) on the high range speakers, which corresponds to the
RMX850 amplifier output of 100W per channel into 8 ohms.
For 16 ohms total: Limiting is set to +3.4dBu (1.15V) on the high
range speakers, which corresponds to the RMX850 amplifier output
of 100W per channel into 16 ohms (200W into 8 ohms).
Limiting is set to 0dBu (0.775V) for the low range speakers, which
corresponds to the RMX850 amplifier output of 800W bridged
mono into 4 ohms. Limiting is not needed on the subs as they can
handle the full output of the amplifier (PLX3402) at 1100W per
channel parallel mono, but may be set to +7dBu (1.7V) as a fail-safe.
6.The Gymnasium Floor and Bleacher speakers are set up as
delay zones to synchronize them with the main system.
Equalization is used to correct the differences between the
Center cluster and the zone speakers. Limiting is not needed
but may be set to +2dBu (0.96V) as a fail-safe (for the MX700).
III. Behringer Feedback Destroyer (Floor Monitors only)
1. Back panel has -10/+4 level switch.
Set to match mixer. Watch meters during music to confirm setting.
2. Horizontal LEDs are indicators for12 filters per channel. Multiple
flashing LEDs mean those filters have not been set. If only 1 of 12
is flashing, it was the last filter adjusted automatically.
3. Front panel display:
Default display is program number. Use 1 for multi-purpose setting.
Use other programs for special purposes.
4. Blank program number, below 1, is for default settings. Start there
for each sound check, set up filters, then store to program 1.
5. Front panel switches (use Jog Wheel after pressing switch):
a. Filter Select: 1-12 available filters per channel
b. Filter Mode: OF=off, PA=manual, AU=auto, SI=single shot,
LO=single shot locked
c. Engine L: left channel
d. Engine R: right channel
e. Frequency,Fine,Bandwidth,Gain: for PA mode only
these are parametric filter parameters
f. IN/OUT: red flashing=bypass all, green=bypass selected filter
g. STORE: save changes to program by pressing once, dialing in
program number, then pressing again
6. Sensitivity for automatic feedback suppression:
Press and hold Filter Mode+Gain for 2 seconds to change
threshold of AU or SI: -3,-6,-9 (-9 is most sensitive)
IV. Behringer Multi-Com Compressor (8 Insert snake)
1. Back panel has -10/+4 level switch.
Set to match mixer. Watch meters during music to confirm setting.
2. Front panel switches and typical setting
a. Release: Out (short, press in for long)
b. Gate: Out (expander, press in for gate)
c. Contour Low: Out (press in to prevent pumping)
d. Enhancer: Out (press in to add brightness)
e. Interact Knee: Either (hard knee or soft knee)
f. Couple: Out (press in for stereo recording)
g. I/O Meter: In to monitor input
h. IN/OUT: Toggle to compare results
3. Rotary pots and typical setting
a. Trigger: Off (use for special effects)
b. Threshold: -10 to -20 (controls input range)
c. Ratio: 2:1 to 4:1 (controls output range)
d. Output: usually 0 (increase to compensate for lower settings
of Threshold or higher settings of Ratio).
e. Limiter: Off (use for special effects)
V. Lexicon MPX110 (2 separate Inserts)
Start with rotary pots set straight up.
1. Input: decrease to prevent clipping distortion
2. Mix: increase for more effect
3. Output: matches level to mixer
4. Effects Lvl/Bal: effect level
5. Adjust: varies effect parameters
6. Bypass: toggle to compare results
7. Variation: 16 variations of each program
8. Program: select effect
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