Ekars EPA-600 User manual

EPA-600/
900/1200
Professional
Power Amplifier
OPERATING MANUAL

1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
.
SAFETY INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 3~4
.
FRONT & REAR PANEL DISPLAY. . . . . . . . . . . . . . . . . . . . . . . . 5
.
FRONT & REAR PANEL CONTROL . . . . . . . . . . . . . . . . . . . . . . 6
.
SPEAKER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 7
.
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
.
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
.
INDEX

INTRODUCTION
2
Taking this opportunity, we express our heartful thanks to clients who purchased our products.
Whole member of our Company, with a pride of long history and tradition, are paying hardest efforts
to turn out products which can go with consumers' taste under continuos R & D and Q.C based on
long-accumulated know-how.
We are sure this product will enhance the function of your systems one level higher, your further
interests in our products and continuous encouragement would be very much appreciated.
Thank you again.

SAFETY INTRODUCTION
3
The following safety instructions have been included in compliance with safety
standard regulations.
1. Read Instructions
All the safety and operation instructions should be read before the appliance is
operated.
2. Retain instructions
The safety and operating instructions should be retained for future reference.
3. Heed warnings
All warning on the appliance and in the operation instructions should be
adhered to.
4. Follow instructions
All operating and use instructions should be followed.
5. Water and Moisture
The appliance should not be used near water-for example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc.
6. Cart and Stands
The appliance should be used only with a cart or stand that is recommended by
manufacturer.
7. Wall and Ceiling Mounting
The appliance should be mounted to a wall or ceiling only as recommended
by the manufacturer.
8. Ventilation
The appliance should be situated so that its location or position does not
interfere with its proper ventilation. For example, the appliance should not be
situated on a bed, sofa, rug or similar surface that may block the ventilation
openings or placed in a built-in installation, such as a bookcase or cabinet that
may impede the flow of air through the ventilation openings.
9. Heat
The appliance should be situated away from heat sources such as heat radiators,
stoves, or other appliances(including amplifiers) which produce heat.
10. Power Sources
The appliance should be connected to a power supply only of the type described
in the operating instructions or as marked on the appliance.

SAFETY INTRODUCTION
4
11. Grounding or Polarization
Precautions should be taken so that the grounding or polarization means of
appliance is not defeated.
Mounting in a Rack
If multiple high-power amp units are mounted in a rack with pour ventilation,
the heat from the amps will cause the interior of the amp to became very hat,
causing the performance of the amps to be impaired. In particular, when
monition in a rack whose back can be left open, mount according to the
following instruction.
12. Rack
Leave a gap of 10 cm or more between the rear panel of the rack and the rear
panel of the amplifier.
13. Mounting
Install the fan kit on the top slot or the top panel of the rack and install a blank-
ing panel between two amps.
14. Cleaning
The appliance should be cleaned only as recommended by the Manufacturer.
15. Object and Liquid Entry
Care should be taken so that object do not fall and liquids are not spilled
into the enclosure through openings.
16. Power Lines
An outdoor antenna should be located away from power lines
17. Damage Requiring Service
The appliance should be serviced by qualified service personnel when:
A. The power-supply cord or the plug has been damaged : or
B. Objects have fallen, or liquid has been spilled into the appliance : or
C. The appliance has been exposed to rain : or
D. The appliance does not appear to operate normally or exhibits a marked change in
performance : or
E. The appliance has been dropped : of the enclosure damaged
18. Servicing
The user should not attempt to service the appliance beyond that described in the
operating instruction

FRONT & REAR PANEL
5
POWER
POWER
CHANNEL B
CHANNEL B
CHANNEL A
CHANNEL A
Min
Min
Max
Max
Min
Min
Max
Max
PROTECT
PROTECT
TEMP-Err
TEMP-Err
LIMIT
LIMIT
SIGNAL
SIGNAL
PROTECT
PROTECT
TEMP-Err
TEMP-Err
LIMIT
LIMIT
SIGNAL
SIGNAL
000W STEREO POWER AMPLIFIER
000W STEREO POWER AMPLIFIER
EPA-000
EPA-000
1
2
3
5
1
2
3
4 4
5
6
LIFT
LIFT
GND
GND
STEREO
STEREO
DUAL
DUAL
MONO
MONO
SN
SN
AC INPUT
AC INPUT
220V 240V
220V 240V
50/60Hz
50/60Hz
AC FUSE
AC FUSE
T00AL 250V
T00AL 250V
TO REDUCE THE RISK OF FIRE
TO REDUCE THE RISK OF FIR E
OR ELECTRIC SHOCK DON'T EXPOSE THIS
OR ELECTRIC SHOCK DON'T EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
EQUIPMENT TO RAIN OR MOISTURE.
WARNI NG
WAR NI NG
:
TO REDUCE THE RISK OF FIRE
TO REDUCE THE RISK OF FIRE
REPLACE ONLY WITH SAME TYPE FUSE.
REPLACE ONLY WITH SAME TYPE FUSE.
CAUTION
CAU TIO N
:
CAUTION
CAUTION
RISK OF ELECTRIC SHOCK
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DO NOT OPEN
MADE IN KOREA
MADE IN KOREA
www.ekars.co.kr
www.ekars.co.kr
000W STEREO
000W STEREO
POWER AMPLIFIER
POWER AMPLIFIER
OUTPUT POWER 000W RMS
OUTPUT POWER 000W RMS
MODEL NO : EPA-000
MODEL NO : EPA-000
(4 Ohm min)
(4 Ohm min)
(8 Ohm min)
(8 Ohm min)
(4 Ohm min)
(4 Ohm min)
CHANNEL B
CHANNEL B
CHANNEL A
CHANNEL A
MONO BRIDGE
MONO BRIDGE
MODE
MODE
BRIDGED
BRIDGED
MONO
MONO
CHANNEL A
CHANNEL A
CHANNEL B
CHANNEL B
FRAME
FRAME
SPEAKER OUTPUTS
SPEAKER OUTPUTS
INPUTS
INPUTS
BALANCED
BALANCED
BRIDGE &
BRIDGE &
DUAL MONO INPUT
DUAL MONO INPUT
12
3
B12
3
B
7
11
11
8
910
10
12
12

FEATURES PANEL CONTROL
6
1. INPUT VOLUME CONTROL
The two input attenuator controls (located at the front panel) adjust gain for their respective amplifier
channels in all modes.
The main amplifiers have input sensitivities of 1.25Volts(+4dBm) and have output voltage gains as follows.
: 300Watts = 34.6Volts / 450Watts = 42.4Volts / 600Watts = 48.9Volts
The Mono Bridge & Dual mono can be controlled by channel "A"
2. SIGNAL L.E.D
This green LED lights when its channel produces an output signal of about 2.5Volts or more,
indicating that there is amplified signal present in the amplifier.
It is useful in determining whether a signal is reaching and being amplified by the power amplifier.
Note : if the signal reaching the power amplifier is 50-100mV, the LED will not be active. Also,
if the amplifier goes into protective mode, this LED will not active.
3. LIMIT LED
This is a Amber LED and this indicators operate when the signal reaching 1.25Volts(+4dBM) or more.
4. TEMP ERR
This indicator operate when the temperature rise to over 95℃at heat sink in the main amplifier.
5. PROTECT LED
This indicator operate when occur a problem, over load, over heating and DC Voltage.
6. POWER SWITCH
Pressing this switch to ON will supply the power to this unit.
7. SPEAKER JACK
Connect same Poles of speaker(+,-) as terminal of connection of Left, Right Speakers.
8. CH A,B INPUT JACK
Balance & Unbalance signal input of Ch A & B.
Can use XLR jack & COMBO jack (XLF, 1/4")
9. STEREO, MONO BRIDGE, DUAL MONO SWITCH
Slide switch to select stereo or dual mono.
* The CH "A" attenuator can be controlled a power amplifier A,B at the same time in case of Dual Mono.
10. FRAME
This switch is for grounding between circuit ground and chassis ground to avoid problems like
an electrical potential difference.
11. AC CORD
AC220V - 240V, 50/60HZ
* Check the plug type before connections.
12. CIRCUIT BREAKER
When occur a problem on this appliance, the fuse will be cut off power to prevent from a problem.
To replace, use standard fuse as specified on this appliance.

SPEAKER CONNECTIONS
7
Connect the left-side loudspeaker to the left-channel speaker terminals and
the right side loudspeaker to the right-channel speaker terminals of this unit,
take care to observe correct(+) and (-) polarity. If the polarity of one speaker is
reversed, the speakers will be out of phase, causing a loss in bass response
and unstable, irregular stereo imaging.
Double-check to make sure that both speaker have the same polarity.
. It is recommended that you use high-quality, heavy gauge speaker cable
with low resistance. Designed specially for audio applications, using thin
cable with high resistance may impair sound quality and prevent the
amplifier from delivering its full potential
. The speaker cables for both channels should be approximately equal in
length, as a marked difference can result in improper left/right balance.
. Speaker Polarity note
+
-+ -
+
-
Rear panel of the amplifier
Stereo
Mono(Bridge)
Speaker R Speaker L
RL
(4 Ohm min)
(4 Ohm min)
(8 Ohm min)
(8 Ohm min)
(4 Ohm min)
(4 Ohm min)
CHANNEL B
CHANNEL B
CHANNEL A
CHANNEL A
MONO BRIDGE
MONO BRIDGE
SPEAKER OUTPUTS
SPEAKER OUTPUTS

8
BLOCK DIAGRAM

9
SPECIFICATIONS
ACCESSORIES
ACCESSORIES
1) Manual : 1 Copy
1) Manual : 1 Copy
2) Spare Fuse : 1 EA
2) Spare Fuse : 1 EA
MODEL
OUTPUT
POWER
INPUT
SENSITIVITY
& IMPEDANCE
Slew Rate
T. H . D
SMPTE IMD
FREQUENCY
HUM & NOISE
BELOW RATED OUPUT
POWER, 4
ohms
DIMENSIONS
& WEIGHT
POWER
CONSUMPTION
ITEMS
4ohms, @1KHz, 0.05% THD
20Hz~20KHz, @rated
output power 4ohms
@RATED OUTPUT POWER
4ohms (60Hz & 7KHz)
BRIDGE MODE, MONO
@rated output power, 4ohms
1dB, 1W RMS, 4ohms
W × H × D (mm)
NET WEIGHT (Kg)
@ rated output power, 4ohms
1dB, @ rated ouput, 4ohms
more than 100dB
( "A" FILTER )
more than 100dB
( "A" FILTER )
more than 100dB
( "A" FILTER )
DAMPING
FACTOR 8ohms, 1KHz
more than 150 more than 150 more than 150
less than 0.05% less than 0.05% less than 0.05%
less than 0.1% less than 0.1% less than 0.1%
1.25V RMS
(+4dBm)
20kohms
1.25V RMS
(+4dBm)
20kohms
1.25V RMS
(+4dBm)
20kohms
10Hz - 40KHz 10Hz - 40KHz 10Hz - 40KHz
20Hz - 20KHz 20Hz - 20KHz 20Hz - 20KHz
more than 400 more than 400 more than 400
485 X 88 X 412 485 X 88 X 412 485 X 88 X 412
14.85 15.20 17.20
T6.3A T8A T10A
900 W 1450 W 1950 W
POWER
REQUIREMENT AC 220V~240V / Fuse
EPA-600
(600 Watts)
EPA-900
(900 Watts)
EPA-1200
(1200 Watts)
600W RMS×2450W RMS×2300W RMS×2

10
MEMO

3rd floor, 271-183, Kochk-2Dong,
Guro-Gu, Seoul, Korea (152-082)
Tel : 82)2+2612+4422
Fax : 82)2+2612+7676
Seoul office.
3Ra-618, Shihwa Industrial Complex, #1378, Jungwang-Dong,
Shiheung-City, Kyunggi-Do, Korea (429-450)
Tel : 82)31+432+5112 / 82)31+432+4422
Fax : 82)31+432+5450 / 82)31+431+1690
E-mail : [email protected] / [email protected]
Home Page : http://www.ekars.co.kr / http://www.samhyoung.co.kr
Headquarter & Overseas Dep.
MEMO
PUBLIC ADDRESS TOTAL SOLUTION