Manual-4
©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098
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104699
3. The CROSSOVER splits the Line Input signal into three
separate Outputs: Full-Range, High-pass and Low-pass,
each selectable for each of the six Outputs. Select the
desired FREQUENCY (80, 110,150 or 200 Hz).
4. Next, set up the six OUTPUTS. First, determine the
number of zones served and the signals to be sent to each.
Using a drawing like the example application diagram in
the Data Sheet is helpful. For ease of wiring, make Outputs
serving a common zone adjacent. Select Full-range, High-
pass or Low-pass as required for each output. The follow-
ing are possible zone configurations:
• Full-range only for medium size bookshelf speakers.
• High-pass only for small distributed ceiling speakers.
• Full-range output combined with Low-pass Output to
enhance bass response.
• High-pass output combined with Low-pass Output for
true bi-amp operation.
5. The ±12 dB OUTPUT trims set Output levels, with relative
levels between Full-range, High-pass and Low-pass.
Note:
the Output trims do not affect Low-pass loudness compen-
sation or Priority Input level.
The idea is to set system
levels for proper operation at the maximum required SPL
(with Remote Level controls set for unity gain). Remote
Level controls then attenuate the level as required.
Automatic loudness compensation
is achieved by altering
the gain control law of any Remote port associated with a
Low-pass Output. A Low-pass Output is always used in
conjunction with a high-pass or full-range Output. Because
the Remote Level control turns the low-pass Output down
at a lesser rate than the high-pass or full-range Output, bass
response is enhanced. The corner frequency for loudness
compensation is set by the CROSSOVER frequency
selection. The reference level for the room is set with the
OUTPUT trim on the front panel. Any Remote Level gain
change results in automatic loudness compensation.
6. A port for a wired Remote Level control is provided for
each Output.
Note: Remote Level controls do not affect the
level of the Priority Input.
Each port provides a 5 volt
reference voltage (REF), a control voltage input (Vc) and a
ground reference. The gain control law for Vc is 50 mV/
dB. Using the optional VR 1 Remote control provides an
audio taper response from 0 dB to > -80 dB.
To control
more than one Remote Port with a single Remote control, it
is only necessary to connect the Vc pin of each additional
port.
An external ground referenced control voltage with a
range of 0 to 5 volts may be used with the Remote ports. If
the ratiometric output of a linear potentiometer is used,
(GND
→
CW, Vc
→
center tap, REF
→
CCW), a linear
log response results. Audio taper response requires a
potentiometer with a reverse log taper. Audio taper
response is achievable using a linear potentiometer by
connecting a resistor equal to 1/10th the value of the
potentiometer between GND and Vc as shown below:
GND
Vc
REF
cw
10k
1k
Variations in wire type do not greatly affect the perfor-
mance of the Remote controls. However, 22-gauge
stranded wire with a flexible jacket is recommended. You
may use 3-conductor unshielded remote control signal
cable for shorter runs (less than 100 feet [30 meters]). For
longer runs, we recommend using shielded cable. The type
of wire required is influenced by your installation and local
electrical codes. Rane Corporation does not provide
cable— please contact your local retail or wholesale outlet.
7. The balanced PRIORITY INPUT operates at line or mic
level, determined by the MIC / LINE switch, on the rear
panel next to the PRIORITY INPUT jack. See Rear Panel
(
) for unbalanced connection rules.
Note: the Priority
Input is not influenced by the AGC, Crossover, Output
trims or Remote Level controls.
The gain range for MIC
level Input is 30 to 60 dB. The gain range for LINE level
Input is 0 to 30 dB. Set the PRIORITY GAIN to prevent
overloading the Input — if the Priority Gain OL illumi-
nates, turn down the GAIN.
8. The PRIORITY DETECT threshold is calibrated in dBu,
and monitors the signal after the input preamp. Any change
in PRIORITY GAIN setting affects the DETECT sensitiv-
ity.
Set the GAIN, then set DETECT
. The range of opera-
tion is +4 dBu to ON. The consequence of setting DETECT
too low is premature triggering due to background noise.
Setting DETECT too high results in excess delay and a
sudden large step in amplitude (perceived as a “pop”). If a
paging mic is used in an environment with a lot of back-
ground noise, we recommend a push-to-talk device.
The release time is fixed at about 6 seconds. The release
delay is based on the typical time required to accommodate
a pause in speech or dead-time between music programs.
9. The PRIORITY DUCKER depth sets the amount of
attenuation applied to the LINE INPUT signal when the
PRIORITY INPUT is activated by the DETECT threshold.
DUCKER depth is continuously adjustable over a range of
0 dB to -80 dB. For equal mixing of PRIORITY and LINE,
set the DUCKER to 0 dB. For PRIORITY replaces LINE
operation, use –80 dB. A value of –12 dB (2 o’clock) is
typical for PRIORITY (page) talks over LINE (music)
operation.
10. The state of the PRIORITY ASSIGN port determines
Priority Input assignment to each of the six Outputs.
Assignment pins are active low with passive internal pull-
up. Any combination of pins may be active at one time.
The select ALL pin is provided for convenience. To
complete an assignment, the Output must be selected by
the PRIORITY ASSIGN port
and
Priority Detect must be
active.
Note that if a combination of Crossover Outputs is
used in one zone, all Outputs serving the zone must be
selected by the PRIORITY ASSIGN port.
The type of wire
recommended is similar to the description in Step 6 above.
Setup…continued from page Manual-1...
