Owner manual

All features & specifications subject to change without notice. 520-016 JAN94Printed in the U.S.A. on Recycled Paper
©Rane Corporation 10802 47th Avenue West, Mukilteo WA 98275-5098 TEL[phone] FAX[phone]
INSTALLATION
STANDARD SOUND REINFORCEMENT MAIN
SPEAKER EQUALIZATION
1. The GE 27 and GE 14 Inputs are automatic balanced/
unbalanced/floating and the Outputs are normal unbalanced.
If the output of the mixer is unbalanced, use a shielded mono
¼" patch cord to the GE 27 or GE 14 Input(s). If the mixer is
balanced, use a shielded two-conductor cable with a (TRS)
¼" plug on one end for the Equalizer and a 3-pin or (TRS) ¼"
plug on the other end, whichever is required to match the
mixer output jack. Wire this cable as shown in Rane Note 110
supplied with this unit.
2. For mono operation of the main speakers with the GE
27, use a “Y” connector to drive both left and right amplifier
channels from the GE 27 Output.
3. If the Equalizer is located more than 10 feet from the
amp rack, obtain a direct box or balancing line transformer to
be installed at the output of the GE 14 or GE 27. Rane models
FBB 44 and FLT 22 can fill this requirement. Running an
unbalanced line through a snake to the stage usually results in
excessive hum and/or buzz in the system.
POWERED MIXER MAIN (AND MONITOR)
SPEAKER EQUALIZATION
1. Most powered mixers utilize unbalanced outputs, so
use shielded mono ¼" patch cords (or uncoiled type guitar
cords) for connections to the equalizer.
2. Most powered mixers that contain built-in graphic
equalizers provide separate inputs and output for this
equalizer. Connect the line out of the mixer to the GE 27 or
GE 14 Input, and the GE Output to the amp input. If the
built-in equalizer is not bypassable, set all mixer/equalizer
sliders to the center (0dB) position and use only the GE 27
or GE 14 sliders for adjustments.
3. You can patch a bypassable built-in equalizer into
your monitor system by connecting the GE 27 or GE 14
between the monitor out and the monitor amplifier input.
STAGE MONITOR EQUALIZATION
1. The connection between the equalizer and the monitor
amp, usually a long one, should be balanced whenever
possible. Use a direct box or balancing line transformer at
the Output of the GE 14 or GE 27. Rane models FBB 44 and
FLT 22 can fill this need.
2. When testing for feedback levels and using the GE 27
or GE 14 to reduce feedback, be sure to test each monitor
speaker/stage mic combination separately, then make final
EQ adjustment according to the demands of the speaker/mic
combination most prone to feedback. Cut the appropriate
slider(s) just enough to eliminate feedback—further attenua-
tion only makes the monitors harder to hear.
CHASSIS GROUNDING
Rane commercial equalizers are supplied with a rear
mounted ground-lift switch. The unit is shipped with this
switch in the “grounded” position, tying circuit ground to
chassis ground. If after hooking up your system it
exhibits excessive hum or buzzing, there is an incompat-
ibility in the grounding configuration between units
somewhere. Your mission, should you accept it, is to
discover how your particular system wants to be
grounded. Here are some things to try:
1. Try combinations of lifting grounds on units that
are supplied with ground lift switches or links.
2. If your equipment is in a rack, verify that all
chassis are tied to a good earth ground, either through the
line cord grounding pin or the rack screws to another
grounded chassis.
3. Units with outboard power supplies do NOT
ground the chassis through the line cord. Make sure that
these units are grounded either to another chassis which
is earth grounded, or directly to the grounding screw on
an AC outlet cover by means of a wire connected to a
screw on the chassis with a star washer to guarantee
proper contact.
Please refer to Rane Note 110 (supplied with your
unit and available on request at no charge if you lose it)
for further information on system grounding.
IMPORTANT NOTE