Inter-M A-120 User Manual
A-60/120
PUBLIC ADDRESS AMPLIFIER
A-60
PROT
-
14
MIN MAX
MASTER
MIN MAX
MIC 2
POWER
MIN MAX
MIC 1
MIN MAX
M
IC 3
-
12dB +12dB
TREBLE
MIN MAX
AUX 1
MIN MAX
AUX 2
-
12dB +12dB
BASS
-10
-
7
-3
0
+3
ON
OFF
Public Address Amplifier
Contents
Contents
Welcome
Warning.........................................................................................................................................1
Unpacking......................................................................................................................................2
Installation
Environment....................................................................................................................................2
Important Safety Instructions.............................................................................................................2
Features............................................................................................................................................3
Accessories.....................................................................................................................................3
Operation ........................................................................................................................................3
Front Panel ......................................................................................................................................4
Rear Panel .......................................................................................................................................5
Connecting Speakers.....................................................................................................................6
Applications ....................................................................................................................................7
Block Diagram ................................................................................................................................8
Specifications ..................................................................................................................................9
Service
Procedures....................................................................................................................................10
Schematic.....................................................................................................................................10
Parts List .......................................................................................................................................10
Variations and Options ...............................................................................................................10
Warranty .......................................................................................................................................10
PUBLIC ADDRESS AMPLIFIER
Welcome
Welcome
A personal welcome to you from the management 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 symbol i s in ten ded to alert the u ser to the
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
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.
*Do not install this equipment in a confined space such as a book case or similar unit.
*The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
*Worded: “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.”
This symbol i s in ten ded to alert the u ser to the
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 insé rées à fond san s en l aisser auc une par tie à
découvert.
A-60/120
1
PUBLIC ADDRESS AMPLIFIER
S3125A
Unpacking
Although your A-60/120 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
2
A-60/120
Features
Features
- HIGH POWER, LOW DISTORTION
60W (A-60) or 120W (A-120) of RMS power, with less than 1% THD.
- VERSATILE AND EASY TO USE
Three Mic inputs, two Aux Inputs.
- PRIORITY MUTING
Mic1 input mutes other inputs when in use.
- FLEXIBLE DESIGN
Mono 4Ω or 70V/100V High-Impedance Outputs.
- TONE CONTROL
Separate Bass and Treble controls to tailor your sound.
PUBLIC ADDRESS AMPLIFIER
Accessories
One detachable AC power cord is provided for use with this product.
Operation
Operation
Make certain that speakers and input sources are properly connected before switching on.
Keep volume levels turned down before switching on.
NOTE: The system’s operation is delayed by approximately three seconds after pressing the power switch. This is
due to the built-in protection circuitry, designed to protect speakers and other system components.
A-60/120
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