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Operation Manual
Public Address Amplifier
PA-612/624
* Rack mount products in the Western Hemisphere(North America, South America,
and the Caribbean) do not have handles installed due to customer preference.
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PUBLIC ADDRESS AMPLIFIER
Welcome
Welcome
A personal welcome to you from the m anagement and employees of Inter-M
All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,
and we are delighted you have purchased one of our products.
We sincerely trust this product will provide years of satisfactory service, but if anything is not to your complete
satisfaction, we will endeavor to make things right.
Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!
This sym bo l is i nt ended to alert the user to t he
CAutION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
C
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
Caution: To prevent electric shock do not use this (polarized) plug with
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.
near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects do
not fall and liquids are not spilled into the enclosure through openings.
*CLASS 2 WIRING (Adjacent to speaker terminal): The speaker output of this apparatus can exceed 10 Watts and could be a shock injury.
Connection to speakers should be performed by a skilled person.
*Do not install this equipment in a confined space such as a book case or similar unit.
*This apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.
It has heed to be easy to disconnect the device. To disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.
*
CAutION
*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing
other than that contained in the operating instructions unless you are qualified to do so.
NOtE
*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
presence of uninsulated “dangerous voltage” within
the prod uct’s encl osure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
This sym bo l is i nt ended to alert the user to t he
presence of important operation and maintenance
(servicing) instructions in the literature accompanying
the appliance.
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade exposure.
fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre insér ée s à fo nd s an s en l ai ss er a ucune partie à
découvert.
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PUBLIC ADDRESS AMPLIFIER
Contents
Contents
Unpacking.......................................................................................................................................2
Installation
Environment....................................................................................................................................2
Important Safety Instructions.............................................................................................................2
Features............................................................................................................................................3
Accessories.....................................................................................................................................3
Operation ........................................................................................................................................3
Front Panel ......................................................................................................................................4
Rear Panel .......................................................................................................................................5
Connecting Speakers.....................................................................................................................7
Applications ....................................................................................................................................8
Block Diagram ................................................................................................................................9
Specifications ................................................................................................................................10
Service
Procedures....................................................................................................................................11
Schematic.....................................................................................................................................11
Parts List .......................................................................................................................................11
Variations and Options ...............................................................................................................11
Warranty .......................................................................................................................................11
PA-612/624
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PUBLIC ADDRESS AMPLIFIER
S
3125A
Unpacking
Unpacking
Although your PA-612/624 is neither complicated nor difficult to operate, we recommend you take a few
minutes to read this brief manual and familiarize yourself with the important information regarding product
features, setup and operation.
As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikely event
the product must be returned for servicing, the original packaging (or reasonable equivalent) is required.
Installation
Installation
Environment
Never place this product in an environment which could alter its performance or reduce its service life. Such
environments usually include high levels of heat, dust, moisture, and vibration.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.
S3125A
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PA-612/624
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PUBLIC ADDRESS AMPLIFIER
Features
Features
- DIGITAL PROCESSING & DIGITAL AMPLIFIER
esigned with a full digital amplifier, low power consumption, low set weight and low heat.
D
- INTERNAL 400HZ HPF
The clearness of a signal can be improved by internal 400Hz high pass filter. When this filter is activated,
the sound under 400Hz frequency is removed.
- INTERNAL THERMISTOR (PA-624 ONLY)
When the unit is overridden by over-heating, internal thermistor will detect it and operate FAN in 2 steps to
protect the unit from over-heating.
- GAIN ADJUSTMENT
Input gain is adjustable from -12dB to 0dB (1V).
- EMERGENCY BATTERY BACKUP
This unit can be worked even at the time when unexpected AC power failure with the emergency battery
backup.
- SLIM DESIGN, COMPACT SIZE
Streamlined design fits in a compact 2RU space.
Accessories
One detachable AC power cord and XLR cord are provided for use with this product.
Operation
Operation
1. Please check the voltage before using AC power source, and then connect the power cord to the power
distributor (PD-659) or directly to a plug receptacle. For DC use, it is compatible with DC 24V.
2. When using the power distributor (PD-659), please keep the power switch on. AC connection should be
made with SWITCHED AC OUTLET of power distributor, for DC, the connection should be made with
Switched DC OUTLET (AMP ONLY).
In this stage, all power source on the rack system can be controlled by the power distributor (PD-659)
and controlling the system by remote-control and converting to DC battery source can be performed.
3. When the power switch is on, the unit starts to work with LED lighting up.
Please adjust proper volume level after checking the level meter on the front panel.
When using a separate power connection, the power switch does not affect to the status of switches on
the other units.
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PUBLIC ADDRESS AMPLIFIER
1
0dB
4
0dB
P
ROT
CLIP
OUTPUT
12 3 4
Front Panel
Front Panel
1. POWER SWITCH
Pressing this switch turns the unit on, as indicated by the Power LED. Pressing it again turns the unit off.
* Note : When the unit turns off by pressing the POWER SWITCH, the device changes to standby mode that
consumes a little power.
2. POWER LED
When the unit is powered on, the Power LED is lit.
3. OUTPUT LEVEL INDICATOR
These three LEDs indicate the amplifier’s output status. The - 40dB LED indicates the presence of audio signal
at the amplifier’s output. The -10dB LED indicates output at nominal operating range.
The red CLIP LED indicates an excessive output level. Do not operate the unit with the CLIP LED is illuminated
continously.
4. PROTECTION INDICATOR
When overloaded, the short of speaker, or overheating are occurred, the unit switches to the protection mode
and the protection LED lights up.
- Once the unit is in Protection mode, it automatically checks the state of the unit. When it does not find a
problem, it automatically restores the unit back to normal mode.
- When PROT LED is on, please check the status of input, output and whether or not there are the shortages in
the speaker, or if the unit is overloaded.
- To cancel the protection mode, please remove the cause of the problem when the unit is off. When restarting
the unit, it returns to normal mode.
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PA-612/624
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Rear Panel
1 2 3 4 5 6
7 98
Rear Panel
PUBLIC ADDRESS AMPLIFIER
1. AC POWER INPUT
Connect the supplied standard AC input cable here.
2. DC INPUT TERMINALS
This is the input terminal for the DC 24V use, please do not forget to check the voltage and polarity (+), (-)
before connecting.
3. SPEAKER OUTPUT TERMINALS
These terminals are used to connect speakers to the unit. You may select 4Ω , 70V or 100V. Make certain the
combined impedance of the speakers is equal to or higher than the rated output impedance of the amplifier.
MODEL EC & Associated, JAPAN Version USA/CANADA & Associated Version
PA-612 COM 4Ω/22V 41Ω/70V 83Ω/100V COM 4Ω/22V 41Ω/70V N/A
PA-624 COM 4Ω/31V 21Ω/70V 42Ω/100V COM 4Ω/31V 21Ω/70V N/A
* In Western Hemisphere(North America, South America and Caribbean), the jack has only 3 terminals
because there is no 100V output.
4. FAN VENTS (PA-624 ONLY)
It is the fan vents located on the front that lower the temperature inside by taking in air. When temperature
reaches a certain level, the speed of the fan gets faster.
Please make certain the vents are not blocked when installing.
5. LINK JACK
The link jack is used for transferring the same input signal to other equipment.
6. INPUT JACK
This is the terminal that receives the signal from the other units such as a pre-amplifier. Please use a
balanced XLR connector with input sensitivity 1V(0dB).
PA-612/624
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PUBLIC ADDRESS AMPLIFIER
7. GROUND LIFT SWITCH
his switch provides connection or disconnection of the amplifier’s ground to AC “earth” ground, to prevent
T
noise from ground loops. Under most circumstances, this switch should be set to FRAME position.
8. HIGH-PASS FILTER SWITCH
The 400Hz high pass filter is controlled on or off by the switch(-3dB : 400Hz).
9. LEVEL ADJUST VOLUME
This knob provides continuous control of the amplifier’s output level, from -12dB to 0dB. Turning the knob
clockwise increases the level, and turning it counter-clockwise decreases the level.
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PA-612/624
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PUBLIC ADDRESS AMPLIFIER
Connecting Speakers
Connecting Speakers
Before connecting speakers, disconnect the AC power cable. Note the proper connecting terminals as shown
elow. Make certain that the total impedance is not less than the rated impedance indicated.
b
HIGH IMPEDANCE SPEAKER INSTALLATION
- Please set up the unit according to the diagram below, be aware and monitor the voltage and impedance
of output terminal.
- Until the sum of the output up to 120W(PA-612) or 240W(PA-624), High impedance speakers can be
connected.
*
PA-612
*
PA-624
- Please do NOT load over 120W(PA-612) or 240W(PA-624) in total.
- Please do NOT use 4Ω output and High impedance at the same time.
- Please check wires not to short-circuit.
* In Western Hemisphere(North America, South America and Caribbean), the jack has only 3 terminals
because there is no 100V output.
* "Class 2 Wiring" means that TERMINALS provided the audio output power exceeds 10W per channel
under normal operating conditions or the apparatus is intended to be installed or interconnected in the
field by a SKILLED PERSON.
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PUBLIC ADDRESS AMPLIFIER
Applications
Applications
8
PA-612/624
The shape of outlets can be different according to country requirements.
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Block Diagram
'(
Block Diagram
PUBLIC ADDRESS AMPLIFIER
PA-612/624
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PUBLIC ADDRESS AMPLIFIER
Specifications
Specifications
PA-612 PA-624
Rated Output Power 120W 240W
Frequency Response 100Hz ~ 18kHz
T.H.D
(RMS output power, 1kHz, 20kHz LPF)
High Pass Filter (400Hz) -3dB
S/N (20kHz LPF, A-WTD) Better than 80dB
Input Sensitivity/Impedance 1V/10k BAL
Output Voltage/Impedance
EC/JAPAN 4Ω/22V, 41Ω/70V, 83Ω/100V 4Ω/31V, 21Ω/70V, 42Ω/100V
Less than 1%
USA/CANADA 4Ω/22V, 41Ω/70V 4Ω/31V, 21Ω/70V
Operation Temperature -10°C ~ +40°C
Power Source 100 - 120VAC or 220 - 240VAC; 50/60Hz
Power Consumption 40W(1/8 power) 65W(1/8 power)
Weight (SET) 8.9kg/19.6lb
Dimensions (SET) 482(W)x88(H)x380(D)mm/19(W)x3.5(H)x15(D)in
* Specifications and design subject to change without notice.
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PA-612/624
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PUBLIC ADDRESS AMPLIFIER
Service
Service
Procedures
Take steps to insure the problem is not related to operator error or other products within the system. Information
provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is related to the product contact your warranty provider as described in the warranty section of this
manual.
Schematic
A Schematic is available by contacting your warranty provider.
Parts List
A Parts List is available by contacting your warranty provider.
Variations and Options
Variations and Options
Variations
Variations of this product exist to reflect the variations in AC power requirements throughout the world. Product
supplied through local sources are compatible with local AC power requirements.
Options
No optional items are available for this product.
Warranty
Warranty
Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditions
of warranty for a given product may be determined first by locating the appropriate country which the product
was purchased in, then by locating the product type.
To obtain specific warranty information and available service locations contact Inter-M directly or the
authorized Inter-M Distributor for your specific country or region.
PA-612/624
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NOTE
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PUBLIC ADDRESS AMPLIFIER
NOTE
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Inter-M, Ltd. (Korea) began operations in 1983.
Since then, Inter-M has grown to become one of the largest manufacturers
of professional audio and commercial sound electronics equipment in the world.
Inter-M has gained worldwide recognition for its own branded products,
as well as private label manufacturing of electronics sold under other names (OEM).
The company is no longer just a Korean company, but rather a global company
that is truly international in scope, with factories and offices in Korea and China,
and sales and marketing operations located in Japan, Europe, and the U.S.A.
With more than 850 employees around the globe,
Inter-M is well-poised for further growth and expansion.
Inter-M Americas, INC.
13875 ARTESIA BLVD. CERRITOS, CA 90703 USA
TEL : +1-562-921-0313, FAX : +1-562-921-0370
Home Page : http://www.inter-m.net, E-mail : [email protected]
Inter-M Corporation
SEOUL OFFICE:653-5 BANGHAK-DONG, DOBONG-KU, SEOUL, KOREA
TEL : +82-2-2289-8140~8, FAX : +82-2-2289-8149
Home Page : http://www.inter-m.com, E-mail : [email protected]
MADE IN KOREA
September 2008 122680
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