American audio GX-300 User Manual

Power

ON

GX-300

American Audio™

Professional Stereo Amplifier

American Audio®

Professional Power Amplifi er

GX-300

Los Angeles Ca. 90058

4295 Charter Street

American Audio®

Power Bridge Stereo Clip Signal Clip Signal

User Instructions

Ch A Ch B

Min Max Min Max

Revised 5/01

anced RCA jacks on the rear of amplifi er. At this point chose the run

the amplifi er in BRIDGE or STEREO mode. (Stereo is the default

setting, see page 5.)

4. Connect the left and right speakers to the amplifi ers output ter-

minals. Use either the 1/4" (6.35 mm) jacks or the 3-way banana

binding post.

GX-300™ Power Amplifier Instructions page 2

1/4" (6.35 mm) phono jacks, 3-pin balanced XLR jacks, or unbal-

Quick Start: The following instructions are provide as a guide for

PROTECTION............................................................................................................................................................11

SPECIFICATIONS.......................................................................................................................................................12

RESET BREAKER.........................................................................................................................................................11

STEREO/BRIDGED MONO........................................................................................................................................11

OUTPUTS....................................................................................................................................................................8

LOW-CUT FILTER......................................................................................................................................................11

REAR PANEL..............................................................................................................................................................6

INPUTS........................................................................................................................................................................7

those user already familiar with the basic operation of amplifi ers.

1. Be sure you amplifi er and all other audio equipment is power

down before attempting any type of connection. The amplifi er

power button is located on the lower left-hand side of the front of

amplifi er.

2. Securely mount the amplifi er in standard 19" rack, or position it

on a solid surface.

3. Connect the left and right output signal a mixer, preamp, or pro-

cessor to the amplifi ers inputs. Use either balanced/unbalanced

QUICK START....................................................................................................................................................................2

SAFETY PRECAUTION....................................................................................................................................................3

FRONT PANEL............................................................................................................................................................5

WARNING: The red banana output terminals on the rear of the

unit marked with the symbol are dangerous when active. Exter-

nal wiring connected to these terminals requires installation by a

qualifi ed person, or make use of preconstructed speaker cables

available at a local professional sound retailer.

5. Connect the amplifi er to a power outlet with a matching power

supply.

6. Turn on all audio components except the amplifi er. Be sure both

Channel A and Channel B volume controls are turned all the way

down (full counter-clockwise), and turn on main power.

7. Turn the mixer or other audio components up and adjust the

amplifi er levels. The green signal LED's on the face of the unit will

indicate signal is being received.

CONTENTS

5. Do not attempt to operate this unit if the power cord has been

frayed or broken. Please route your power cord out of the way

of foot traffic.

6. Do not attempt to remove or break off the ground prong

from the electrical cord. This prong is used to reduce the

risk of electrical shock and fire in case of an internal short.

7. Always have the front gain controls set to their lowest level

GX-300™ Power Amplifier Instructions page 3

1. Be sure to save the packing carton in the unlikely event this

unit may have to be return the unit for service.

2. Read all documentation before attempting to operate your

new amplifier. Please save all you documentation for future

reference.

3. To reduce the risk of fire or electrical shock, do expose this unit

to rain, moisture, water or other liquids.

4. Be sure that the local power outlet match that or the required

voltage for your amplifier.

AUTHORIZED AMERICAN AUDIO® DEALER.

INSIDE. REFER ALL SERVICE TO YOUR

The lightning flash with an arrow triangular

symbol is intended to alert the user to the

presence of non insulated “dangerous volt-

age” within the products enclosure, and

may be of sufficient magnitude to constitute

a risk of electric shock.

The exclamation point triangular symbol is

intended to alert the user to the presence

of important operating and maintenance

(servicing) instructions in the user manual

accompanying the CD player.

OF LESS THAN 2 OHMS. OR ANY

COMBINATION OF SPEAKERS THAT

TOGETHER ARE LESS THAN 2

OHMS!

USING ONE SPEAKER, IT MUST BE

RATED AT 4 OR MORE OHMS.

USING TWO SPEAKERS, THEY MUST

RATED EACH AT 4 OR MORE OHMS.

USING THREE SPEAKERS, THEY

MUST BE RATED EACH AT 8 OR

MORE OHMS.

CAUTION: TO REDUCE THE RISK OF ELECTRIC

THERE ARE NO USER SERVICEABLE PARTS

SHOCK, DO NOT REMOVE THE COVER.

Risk of electric shock

Do not open -

CAUTION

FOR OPTIMUM PERFORMANCE AND

RELIABILITY DO NOT PRESENT THE

AMPLIFIER WITH A SPEAKER LOAD

connection.

9. Do not block the units cooling vents or fan intake. If this unit is

being used in an extremely dusty or smoky environment, the

unit should be blown through on a regular basis.

10.Do not remove the top cover under any conditions. There are

no user serviceable parts inside.

11.Do not drive the inputs with a signal level greater than that

required to drive equipment to full output.

12.Do not try to run the input signal of an amplifier by the

output of any other amplifier.

13.Never ground a RED (positive) terminal.

14.Disconnect the unit’s main power when left unused for long

periods of time.

during initial power-up to prevent speaker damage .

8. Disconnect from main power before making any type of

Important Precautions

NESOUMETTE JAMAIS L’AMPLIFICATEUR

A UNE CHARGE D’IMPEDANCE TOTALE

INFERIEURE A 2 OHMS, NI AVEC UN H.P.

NI EN COMBINAISON DES H.P.

AVEC UN H.P., IL FAUT UNE CHARGE

D’IMPEDANCE MINIMUM DE 2 OHMS.

AVEC DEUX H.P., FAUT POUR CHAOUN

UNE CHARGE D’IMPEDANCE MINIMUM

DE 4 OHMS.

AVEC TROIS H.P., FAU T P O UR CHAOUN

UNE CHURGE D’IMPEDANCE MINIMUM

DE 8 OHMS.

POUR ASSURER LA FIABILETE ET

OBTENIT UNE PERFORMANCE OPTIMALE,

Stereo Operation.

14. Sign al and Clip LED indicators on the front panel detail input

signal integrity.

15. Front panel power switch and power LED indicator.

GX-300™ Power Amplifier Instructions page 4

12. Two rackspace case design.

13. Mo de monitor LED's on the front panel detail Bride-Mono or

11. Li gh t weight only 16 Lbs (4.1 Kgs)

10. Two year limited warranty.

Features

1. Bridge-Mono/Stereo mode switch. This switch allow the ampli-

fier operating mode to toggle between stereo and bride-mono

mode.

2. Built-in protection circuitry: DC output protection, Overload

protection (clip limiting), and Short circuit protection.

3. Variable speed cooling fan for optimal performance and cool-

ing.

4. 19" (48.3 cm) rackmountable case design.

5. 9" (220 cm) shallow case design, allowing this amp to be

installed in a shallow rack, stacked on top of each other, or

stacked on a cart.

6. Three different input options; 1/4" balanced/unbalanced jacks,

balanced XLR jacks, and Unbalanced RCA jacks.

7. Tw o different output options (speaker connections); 1/4" jacks

or 3-way banana style binding post.

8. Dedented channel gain controls on the front panel.

9. Rear panel 5 amp reset button (breaker type).

comments or suggestions.

any question should you encounter problems during your set

up or initial operation. For service related issue please contact

American Audio® Technical Support Team. Service Hours are

Monday through Friday 9:00 a.m. to 5:00 p.m. Pacific Standard

Time.

Voice: [phone]

Fax: [phone]

E-mail: [e-mail]

You may also visit us on the web at www.americandj.com for any

19” rack. The front panel provides four holes used to screw the

unit into a rack.

Customer Support: For assistance beyond that which is cover

in this manual, American Audio® provides a toll free customer

support line, to provide additional set up help and to answer

stand. When a cart is used, use caution when moving

the cart/unit combination to avoid injury from tip-overs.

Cart Installation: Use only with a stable cart or

Installation: This amplifier is designed to mount in a standard

unpacking, inspect the amplifier for any type of damage that may

have occurred during shipping or transit. If you notice any type of

damage notify your dealer immediately for instructions.

Unpacking: Carefully open and unpack your amplifier. After

information concerning the proper any safe operation of your new

amplifier.

best and highest quality products at an affordable price. Please

read and understand this manual completely before attempting

to operate your new amplifier. This booklet contains important

Introduction: Congratulations and thank you for purchasing the

tation of American Audio’s continuing commitment to produce the

American Audio® GX-300™ amplifier. This amplifier is a represen-

General Information