Inter-M A-120 User Manual

A-60/120

PUBLIC ADDRESS AMPLIFIER

A-60

PROT

MIN MAX

MASTER

MIN MAX

MIC 2

POWER

MIN MAX

MIC 1

MIN MAX

IC 3

12dB +12dB

TREBLE

MIN MAX

AUX 1

MIN MAX

AUX 2

12dB +12dB

BASS

-10

-3

OFF

Public Address Amplifier

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

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

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

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

A-60/120

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

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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