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GPA SERIES POWER AMPLIFIERS
INTRODUCTION:

Congratulations on purchasing a

EMINI

GPA S

ERIES

OWER

MPLIFIER

This state of-the-art power amplifier includes the latest features & is backed
by a

THREE

year limited warranty. Prior to use, we suggest that you careful-

ly read all the instructions.

FEATURES:

- 30 Hz to 50 kHz frequency response, <0.05% THD (0.02% typical)
- High output power to drive professional loudspeakers without clipping
- Comprehensive protection circuitry with protect LED indicator
- ¼" TRS & XLR balanced/unbalanced inputs
- Speakon & ¼" speaker outputs
- Three modes of operation - stereo, parallel mono, and mono bridge
- Ground lift switch
- Decibel (dB) level meter with clip LEDs
- Subsonic and ultrasonic filters for better protection and more efficient
operation
- Aluminum extrusion heat sink design with directly mounted output tran-
sistors for no-fault operation
- Air guide with front-to-rear airflow and cooling fan for thermal stability
and reliability

CAUTIONS:

1. Read all operating instructions before using this equipment.
2. To reduce the risk of electrical shock, do not open the unit. There are

SER

EPLACEABLE

ARTS

NSIDE

. Please contact the

EMINI

ERVICE

EPARTMENT

or your authorized dealer to speak to a qualified

EMINI

OUND

RODUCTS

technician.

3. In the USA: If you experience problems with this unit, please visit

HTTP

://

WWW

GEMINIDJ

COM

SUPPORT

HTML

or call 1 (732) 738-9003 for

EMINI

USTOMER

ERVICE

. Do not attempt to return this equipment to your deal-

er.
4. Be sure to allow adequate front & rear ventilation to avoid possible heat
damage to your equipment.
5. Be sure that the power is

before making connections. This will elim-

inate any chance of unexpected, loud audio transients that could damage
your speakers or amplifier.
6. Be sure that the power is

when changing modes of operation &

when changing the position of the Ground Lift Switch.
7.

XPOSE

HIS

NIT

AIN

OISTURE

Operators of electron-

ic equipment should in no way be in contact with water.
8.

EVER DEFEAT THE GROUND PIN OR POLARIZED BLADES

found on the 3-

prong power plug. Defeating this safety feature poses a risk of electrocu-
tion. If your outlets do not comply to these standards, contact an electri-
cian.
9.

PRAY

LEANER

UBRICANT

ONTROLS

WITCHES

CONNECTIONS:

1. Before plugging this unit into any outlet, make sure that the

OLTAGE

ELECTOR

(1) switch is set to the proper voltage. To change the

selection, unscrew the hard plastic protective top with a Phillips head
screw driver. Then use a flat head screw driver to move the switch to the
proper selection (

115 V/230 V

2. Ensure that the

OWER

UTTON

(11) is in the

position prior to

making any connections. This unit comes with a

OWER

ORD

(2).

Plug into the rear panel

AC I

N WITH

USE

(3) jack before plugging it

into a proper power source.

NOTE:

LOCATED BY THE AC IN WITH FUSE

(3)

IS A

250 V

FUSE TO

PROTECT AGAINST ELECTRICAL SURGES

TO REPLACE THE FUSE

FIRST

DISCONNECT THE

OWER

ORD

(2),

AND PLACE A FLAT HEAD SCREW

DRIVER INTO THE GROOVE LOCATED INSIDE THE AC IN WITH FUSE

(3)

DISLODGE THE FUSE

REPLACE THE FUSE WITH ONLY A

250 V

FUSE

3. The

GPA

series has 2 sets of inputs:

- The

XLR B

ALANCED

NPUTS

(10) accept a line level signal.

With standard three prong XLR connections, prong 1 is the
ground, prong 2 is hot or positive (+) & prong 3 is cold or
negative (-).

- The

¼" TRS B

ALANCED

NPUTS

(9) accept a balanced as well

as an unbalanced line level signal. The unbalanced line uses a

standard tip-sleeve connection. The tip is positive & the sleeve is negative
or ground. The balanced line uses a tip-ring-sleeve connection. (

TRS

) The tip is hot

or positive (+), the ring is cold or negative (-), & the sleeve is shield or
ground.
4. The

GPA

series has 2 sets of outputs.

- The 2

PEAKON

UTPUTS

(4) connect speakers to the

amplifier.

- The

RIDGE

UTPUT

PEAKON

(5) connects the

speakers to the amplifier only in

ONO

RIDGED

PERATION

This

mode allows the entire power of the amplifier to be used with one
mono channel. This mode of output is meant only for 8 ohms or
greater impedance.

- The

¼" S

PEAKER

UTPUTS

(6) connect speakers to the

amplifier.

NOTE: M

AKE SURE THE

OWER

UTTON

(11)

IS IN THE OFF POSITION BEFORE

MAKING ANY CONNECTIONS

OPERATIONS:

PERATION

ODE

WITCH

The

PERATION

ODE

WITCH

(8) is

used to set the unit for

TEREO

mode,

ARALLEL

ONO

mode or

ONO

RIDGE

mode. Total speaker impedance must not be

lower than 4 Ohms per channel for

TEREO

ARALLEL

ONO

modes, & 8

Ohm for

ONO

RIDGE

mode.

NOTE:

THE AMPLIFIER

OWER

UTTON

(11)

MUST BE TURNED OFF WHEN CHANG

ING MODES OF OPERATION

TEREO

PERATION

The unit has two channels for

TEREO

operation. Each

channel provides a separate & discrete signal at the speaker outputs
according to the signal received at the inputs. The following instructions
are for applications with 4 Ohm to 8 Ohm speakers of matched power rat-
ings.

With the power

, set the

PERATION

ODE

WITCH

(8) to the

TEREO

position.

With the power

, connect your input cables to the

CH 1

CH 2

inputs

using the

XLR B

ALANCED

NPUTS

(10) or

¼" TRS B

ALANCED

NPUTS

(9) of

each channel.

Connect the loudspeakers to either the

CH 1

CH 2 S

PEAKON

(4) or

¼"S

PEAKER

UTPUTS

(6).

NOTE:

THE TOTAL SPEAKER LOAD MUST BE AT LEAST

4 O

HMS PER CHANNEL

IF YOU

TRY TO OPERATE AT A LOWER IMPEDANCE

THE AMPLIFIER WILL GO INTO PROTECTION

MODE

CEASE OPERATING UNTIL YOU CORRECT THE LOAD CONDITIONS

With the

CH 1

(13) &

CH 2

(14) volume rotary controls set to zero (fully

counterclockwise), push the

OWER

UTTON

(11) to turn

the amplifier.

Apply a signal to the input of the amplifier. The level of the input signal
should be as high as you will ever need it to be. This way, it will be as high
above the amplifier's noise floor as possible, ensuring an excellent per-
formance & signal to noise ratio. Adjust the

CH 1

(13) &

CH 2

(14) volume

rotary controls for each channel to achieve the desired maximum listening
level, or the maximum output level of the speaker systems, whichever comes first.

NOTE:

WHEN THE CLIP LEDS LIGHT

THERE IS DISTORTION PRESENT IN THE AMPLI

FIER

S OUTPUT SECTION

IF A CLIP LED LOCATED AT THE TOP OF THE VU METER

(15)

REMAINS ON OR FLASHES REPEATEDLY

REDUCE THE SIGNAL LEVEL BY LOWERING THE

INPUT LEVEL CONTROL FOR THE CHANNEL THAT IS CLIPPING OR REDUCE THE LEVEL
AT THE SOURCE

ARALLEL

ONO

PERATION

When the amplifier is in

ARALLEL

ONO

mode, the same monophonic signal is output on both output channels of
the

PEAKON

UTPUTS

(4) &

¼” S

PEAKER

UTPUTS

(6). Each channel's output

is controlled independently by the respective

CH 1

(13) &

CH 2

(14) vol-

ume rotary controls.

With the power

, set the

PERATION

ODE

WITCH

(8) to the

ARALLEL

ONO

position.

With the power

, connect your input cable to the

CH 1

input only

using the

XLR B

ALANCED

NPUT

(10) or

¼" TRS B

ALANCED

NPUT

(9) of chan-

nel 1.

Connect the loudspeakers to both

PEAKON

UTPUTS

(4) or

¼" O

UTPUTS

(6).

NOTE:

THE TOTAL SPEAKER LOAD MUST BE AT LEAST

4 O

HMS PER CHANNEL

IF YOU

TRY TO OPERATE AT A LOWER IMPEDANCE

THE AMPLIFIER WILL GO INTO PROTECTION

MODE

STOP OPERATION UNTIL YOU CORRECT THE LOAD CONDITIONS

With the

CH 1

(13) &

CH 2

(14) volume rotary controls set to zero (fully

counterclockwise), push the

OWER

UTTON

(11) to turn

the amplifier.

Apply a signal to the input. The level of the input signal should be as high
as you will ever need it to be. This way, it will be as high above the ampli-
fier's noise floor as possible, ensuring an excellent performance & signal to
noise ratio. Adjust the

CH 1

(13) &

CH 2

(14) volume rotary controls to

achieve the desired maximum listening level.

NOTE:

WHEN THE CLIP LEDS LIGHT

THERE IS DISTORTION PRESENT IN THE AMPLI

FIER

S OUTPUT SECTION

IF A CLIP LED REMAINS ON OR FLASHES REPEATEDLY

REDUCE THE SIGNAL LEVEL BY LOWERING THE INPUT LEVEL CONTROL FOR THE CHAN