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Manual-1

GE 30

GRAPHIC EQUALIZER

OPERATORS 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 con-

nected 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 3-

pin 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 unnec-

essary 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.

OUTPUTS are balanced as well and follow the same con-

vention 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 un-

balanced 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.

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.

WEAR PARTS: is product contains no wear parts.

Summary of content (4 pages)

PAGE 1
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. This 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. This is approximately unity gain in the BOOST/CUT mode.
PAGE 2
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.
PAGE 3
REAR PANEL DESCRIPTION 1 XLR INPUT connector. This is a fully differentially balanced Input, connected such that pin 2 is hot “+”, pin 3 is return “–” and pin 1 is chassis ground. For unbalanced operation, drive pin 2 as hot, and pin 3 as return. For grounding and shielding information, consult the RaneNote 110, “Sound System Interconnection” section for expanded details. 2 XLR OUTPUT connector.
PAGE 4
OPERATING INSTRUCTIONS HYPERBOLE The GE 30 is, as are all Rane equalizers, a constant bandwidth device. This guarantees that the Q (a measure of bandwidth) of all the 1/3-octave filters will be maintained regardless of the position of the filter’s slide control. This is accomplished by completely isolating the center frequency and bandwidth parameters of each filter from the variable resistor connecting the filter to the signal path.