Rane GE 30 User Manual
OPERATORS MANUAL
GE 30
GRAPHIC EQUALIZER
QUICK START
If you are one of those people who think owner’s manuals are included with a product to help absorb shock and vibration during
shipment, you are a lot like we are. is section is for you. You want to fire up your equalizer without wading through a bunch of
stuff in manuals. Great. Read on. We’ll keep it short.
Set the input LEVEL control to about 6. is is approximately unity gain in the BOOST/CUT mode. (In the CUT-ONLY
mode the level control should be set to 2 for unity gain.) Your sound system should be set up such that gain or loss is not required in
the equalizer(s). Set the EQ MODE switch on the rear for the desired operating mode, CUT-ONLY or BOOST/CUT. e LEDs on
the front illuminate, telling you which mode you are in. Set the OUTPUT MODE switch on the rear for the desired output coupling
mode (ACTIVE or TRANSFORMER COUPLED). Adjust the LOW CUT and HIGH CUT FILTER controls on the front for
the desired low and high cut frequencies. Full counterclockwise on the LOW CUT control and full clockwise on the HIGH CUT
control essentially defeats these functions.
If you read only this section, we assume you know how to set up an equalizer. So set the sliders where you want them and you’re
outta here.
Never connect anything except an RS 1 or other approved Rane AC power supply to the thing that looks like a telephone
jack on the rear of the GE 30. is is an AC input and requires some special attention if you do not have an operational power
supply EXACTLY like the one that was originally packed with your unit. See the full explanation of the power supply requirements
elsewhere in this manual.
GE 30 CONNECTION
When connecting the GE 30 to other components in your
system for the first time, leave the power supply for last. is will
give you a chance to make mistakes and correct them before any
damage is done.
INPUTS on the GE 30 are balanced. ey may be connected for either balanced or unbalanced operation. is product
offers the choice between going in and out of it using either the
3-pin connectors or the handsome black #6 terminal strips with
the finely plated screws. We will describe here the use of the 3pin connectors. e terminal strips are connected in parallel and
are used in the same way. Only the names have been changed.
Pin 2 is hot “+”, pin 3 is return “–”, and pin 1 is chassis ground.
Balanced inputs require the use of pins 2 and 3. Pin 1 is unnecessary unless you are using it for shield ground. For unbalanced
operation, pins 1 and 3 must be shorted together to prevent 6 dB
of gain reduction. Drive pin 2 as hot and the combination of 1
and 3 as ground.
WEAR PARTS: is product contains no wear parts.
OUTPUTS are balanced as well and follow the same convention as the inputs. ere are some tricky things to be careful
of at the output. If active balanced operation is your preference,
hot “+” and return “–” should be all that is required. It does
not take three wires to conduct a signal from one unit to the
next. Connect the shield to case or chassis ground. Transformer
balanced outputs are connected in the same manner. Active unbalanced output requires “+” and ground only. Use pins 2 and 1
respectively. In this mode, do not short pins 1 and 3. If, however,
you are using the transformer coupled mode and are running
unbalanced, do short pins 1 and 3 or you will get little or no
output. In case you haven’t noticed, if you plan on throwing the
selector switch very often it’s a good idea to connect everything
in a balanced configuration.
Manual-1
FRONT PANEL DESCRIPTION
1 POWER switch. Pressing the top half of this switch causes the mechanism contained within to connect power from the remote
power supply to the circuitry of the unit causing it to operate (ON). Pressing the bottom half snaps the switch to the opposite
operating mode (OFF).
2 SIGnal present indicator illuminates green when an input signal greater than -20 dBm is applied to the unit, regardless of the
position of any controls on the unit, including the BYPASS switch.
3 OverLoad indicator glows or flashes red when the signal passing through the unit is within 4dB of the maximum allowable level
at some point in the circuitry.
4 LEVEL sets the Level of the signal coming into the GE 30. Turn this control down if the OVERLOAD LED lights up steadily
(meaning too strong an Input signal). Since actual unity gain depends on varying slider settings (which is why we have not
marked a unity gain position on the front panel), use the BYPASS switch to determine the exact unity gain position of this
LEVEL control by comparing EQ and BYPASS loudness. Full counterclockwise rotation of this control provides full input attenuation (signal off ), full clockwise rotation yields a minimum of +6 dB of gain in the BOOST/CUT mode, or a minimum of +20 dB
of gain in the CUT-ONLY mode.
5 Overall BYPASS switch and indicator. Pressing this button to its in and locked position provides a complete “hard-wire” bypass
of all active circuitry in the GE 30, including grounds. e GE 30 automatically switches to the Bypass mode in the event of a
power failure. is insures that should something fail in the power supply of the unit, signal passes to the rest of the system. e
indicator illuminates red when the GE 30 is placed in the Bypass mode via the switch.
6 Equalization controls. ese 60 mm slide controls set the relative level of boost or cut at each 1/3-octave frequency location. e
effect of each control is indicated by one of two calibration scales, the selection of which is denoted by an illuminated yellow LED
located at the top of the CUT-ONLY scale and at the center of the BOOST/CUT scale.
7 LOW CUT filter control rotates in a clockwise direction to increase the frequency of the low filter cutoff. e calibrations on the
front panel indicate the -3 dB point of the filter. Rotating this control to its full counterclockwise position effectively bypasses the
filter.
8 HIGH CUT filter control rotates clockwise to increases the frequency of the high cut filter cutoff. Like the low-cut filter, the
calibrations reflect the -3 dB point of the filter. Full clockwise rotation effectively bypasses the filter.
9 CUT-ONLY indicator illuminates yellow when the EQ MODE select switch on the rear panel is depressed, placing the GE 30 in
its CUT-ONLY mode.
0 BOOST/CUT indicator illuminates yellow, advising the operator that the rear mounted EQ MODE function select switch is in
its OUT position, placing the GE 30 in the + 12 BOOST/ -15 CUT mode.
Manual-2
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