Hafler GX2300, GX2600, GX2600CE, GX2300CE User Manual

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Table of Contents

DECLARATION OF CONFORMITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

TECHNICAL DESIGN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Why a new amplifier topology? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

What else distinguishes these amplifiers? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Universal Line Voltage Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Protection Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

DESIGN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Power/Thermal Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

AC Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Audio Ground Chassis/Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Earth Grounded Source Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Floated Source Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

CD Horn Equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Level Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Stereo/Biamp Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Stereo/Mono 70V 100V Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Load Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Thermal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Clipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Stereo Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Biamp Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Bridge Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

70V Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

100V Mono Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

70V Stereo Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

SERVICE POLICY AND LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

PC BOARD LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

EMI Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Crossover CD EQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Time Delay/Phase Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Bridge Rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

EMI Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Crossover CD EQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Time Delay/Phase Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

High Voltage Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Housekeeping Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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Declaration of Conformity

Application of Council Directive: 73/23/EEC (low voltage directive)

Application of Council Directive: 89/336/EEC (EMC Directive)

Standard(s) to which Conformity is Declared: EN55103 -1 (Emissions)

EN55103 -2 (Immunity)

EN60065 (Safety)

Manufacturer’s Name: Hafler

Manufacturer’s Address: 546 South Rockford Drive, Tempe, Arizona 85281

Importer’s Name:

Importer’s Address:

Type of Equipment: 2-channel Audio Power Amplifier

Model No.: GX2300 GX2600

GX2300CE GX2600CE

Serial Number:

Year of Manufacturing: 2000 2001 2002 2003 2004

I, the undersigned, hereby declare that the equipment specified above conforms
to the above Directive(s) and Standard(s)

Place: Hafler

Date: 5/1/2000 James C. Strickland, VP Engineering

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NOTICE - IMPORTANT SAFETY INFORMATION

1. READ INSTRUCTIONS

All the safety and operating instructions of your Hafler equip­ment should be read before power is applied to the equipment.

2. RETAIN OWNER'S MANUAL

These safety and operating instructions should be retained for
future reference.

3. HEED WARNINGS

All warnings on the equipment and in the operating instructions
are important and should be followed.

4. FOLLOW INSTRUCTIONS

All operating and use instructions are important and should be
followed.

5. HEAT

The equipment should be kept away from areas of high temper­ature, i.e., heater vents, radiators, stoves/ovens, fireplaces, etc.

6. VENTILATION

The equipment should be used in an area suitable for proper
ventilation. Care should be taken not to impede airflow in and
around the cabinet.

7. WATER AND MOISTURE

The equipment should not be used in or around water, such as
a bathtub, sink, or swimming area. Also, the equipment should
not be used in areas prone to flooding, such as a basement.

8. POWER SOURCES

The equipment should be connected only to a power source of
the same voltage and frequency as that listed on the rear panel
above the power cord entry point.

9. POWER CORD PROTECTION

Power cords should be arranged so they do not interfere with
the movement of objects in the room: people, fan blades, utility
carts, etc. Also, care should be taken that the cord is not
pinched or cut, and placed so it is not in danger of being
pinched or cut, as in under a rug, around a tight corner, etc.

10. POWER CORD GROUNDING

The power supply cord is of a three wire grounded type,
designed to reduce the risk of electric shock sustained from a
live cabinet. It is assumed to be of suitable length for most
uses of the equipment. The use of extension cords and power
strips is discouraged unless they are of suitable rating to deliver
the required total current for safe operation of all connected
equipment. Furthermore, extension cords or power strips must

provide the same three wire grounded connection. It is impor­tant that the blades of the equipment plug be able to fully insert
into the mating receptacle. Never remove the round grounding
pin on the plug in an attempt to mate to a two wire ungrounded
receptacle: use a grounding adapter with the grounding tab or
wire suitably connected to earth ground.

11. NON-USE PERIODS

During periods of extended non-use, the power cord should be
unplugged from the power source.

12. CLEANING

The equipment should be cleaned only as detailed in the oper­ating instructions.

13. OBJECT AND LIQUID ENTRY

Care should be taken so that objects and/or liquids, such as
cleaning fluids or beverages, are not spilled into the enclosure
of the equipment.

14. DAMAGE REQUIRING SERVICE

Hafler equipment should be serviced by qualified service per­sonnel when:

A. The power supply cord or plug has been damaged, or
B. Objects have fallen onto, or liquid has been spilled into the

equipment, or
C. The equipment has been exposed to rain, or
D. The equipment does not appear to operate normally or

exhibits a marked change in performance, or
E. The equipment has been dropped, or the enclosure has

been damaged.

15. SERVICING

The user should not attempt to service the equipment beyond
that which is described in the operating instructions. All other
service should be referred to qualified service personnel.

16. CARTS AND STANDS

The equipment should be used with carts or stands only of suf­ficient strength and stability for the use intended.

An equipment and cart combination should be moved with care.
Quick stops and starts, excessive force, and uneven surfaces
may cause the equipment and cart combination to topple.

The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the user to the 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.

The exclamation point within an equilateral triangle is intended
to alert the user of the presence of important operating and
maintenance (servicing) instructions in the literature accompa­nying the appliance.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING:

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

TO PREVENT FIRE OR SHOCK HAZARD

!

– 4 –

ADVERTENCIA – INFORMACION DE SEGURIDAD IMPORTANTE

El símbolo de flecha relámpago dentro de un triángulo equi­látero, es para alertar al usario de la presencia de “voltajes peli­grosos” no aislados en el interior del aparato, los cuales pueden
ser de suficiente magnitud para constituir un riesgo de choque
eléctrico a las personas.

El símbolo de exclamación dentro de un triángulo equilátero, es
para alertar al usuario de la presencia de instrucciones impor­tantes de operación y mantenimiento (servicio) en la docu­mentación que acompaña al equipo.

1. LEA LAS INSTRUCCIONES

Todas las instrucciones de seguidad y operación de su equipo
Hafler, deben ser leídas antes de que el equipo sea conectado
dléctricamente.

2. CONSERVE EL MANUAL DEL PROPIETARIO

Estas instrucciones de seguridad y operación, deben ser con­servadas para futuras referencias.

3. CUADROS DE ADVERTENCIAS

Todas las advertencias en el equipo y en las instrucciones de
operación, son importantes y deben ser seguidas.

4. SIGA LAS INSTRUCCIONES

Todas las instrucciones de uso y operación son importantes y
deben ser seguidas.

5. CALOR

El equipo debe ser mantenido lejos de areas de alta temperatu­ra, como por ejemplo: ventilaciones de calentadores, radi­adores, estufas/hornos, hogueras, etc.

6. VENTILACION

El equip debe ser usado en áreas con ventilación adecuada.
Deben er tornadas las precauciones necesarias para no
impedir el flujo de aire dentro y alrededor del aparato.

7. AGUA Y HUMEDAD

El equipo no debe ser usado en el agua ó alrededor de ésta,
tales como en una bañera, tanque o áreas de nado. También,
el equipo no debe ser usado en áreas propensas a inunda­ciones, tales como en un sótano.

8. FUENTES DE PODER

El equipo debe ser conectado a una fuente de poder del mismo
voltaje y frecuencia que el indicado en el panel trasero sobre el
punto de entrada del cable de corriente.

9. PROTECCION DEL CABLE DE CORRIENTE

Los cables de corriente deben ser dispuestos de forma tal que
no interfieran con el movimiento de objetos en la sala: per­sonas, aspas de ventilación, carretillas, etc. También, es nece­sario tener cuidado de que el cable no esté punzado o cortado,
y debe estar ubicado de forma tal que esto no ocurra, como
podría suceder debajo de una alfombra o al pasar el cable por
una esquina aguda, etc.

10. ATERRAMIENTO DEL CABLE DE CORRIENTE

El cable de corriente es del tipo aterrado de tres hilos, diseñado
para reducir el riesgo de una descarga eléctrica procendent de

un chasis energizado. Se asume que su longitud es suficiente
para la mayoría de usos del equipo. El uso de extensiones y
multienchufes no es recomendado, a menos que tengan el
amperaje adecuado para poder suministrar la corrioente
requerida pra la operación segura de todo el equipo conectado.
Aun más, las extensiones deben proveer de la misma conec­ción aterrada de tres hiles. Es importante que el enchufe se
pueda introducir completamente en el receptáculo. Nunca
remeva el pin de aterramiento en un intento por conectar el
cable en un receptáculo de dos hilos no aterrado: use un adap­tador de aterramiento que esté adecuadamente conectado a un
punto de tierra.

11. PERIODOS SIN USO

Durante períodos prolongados sin uso del equipo, el cable de
corriente debe ser desconectado de la fuente de electrixidad.

12. LIMPIEZA

El equip debe ser limpiado solo en la forma que se detalla en
las instrucciones de operación.

13. INTRODUCCIÓN DE OBJETOS Y LIQUIDO . . . . . . . . . . . .

Deben ser tornadas precauciones con el fin de que objetos y/ó
líquidos, tales como fluidos de limpieza y gaseosas, no sean
derramados dentro del chassis del aparato.

14. DAÑOS QUE REQUIEREN DE SERVICIO

Los equipos Hafler deben ser llevados a servicio por personal
calificado cuando:

A. El cable de corriente ó el enchufe haya sido dañado, ó
B. Objetos ó líquido hayan sido introducidos ó derramado en

el equipo, ó
C. El equipo haya sido expuesto a lluvia, ó
D. El equipo aparenta no operar normalmente ó exhibe un

marcado cambio en su desempeño, ó
E. El equipo se ha caído, o el chassis ha sido golpeado.

15. SERVICIO

El usuario no deberá intentar darle servicio al equipo más allá
de lo que está descrito en el instructivo de operación. Todo lo
demás, deberá ser referido a servicio por personal calificado.

16. CARRETILLAS Y SOPORTES

El equipo podrá ser usado con carretillas y soportes que ten­gan la fortaleza y estabilidad suficiente para el uso previsto.

La combinación equipo/carretilla deberá ser movida con cuida­do. Rápidas paradas y arranques, excesiva fuerza y superficies
imparejas, pueden causar el volcamiento del conjunto de car­retilla/equipo.

PELIGRO

RIESGO DE DESCARGA

´

ELECTRICA NO ABRIR.

PRECAUCIONS:

Para Prevenir el incendio o la descarga electrica, no

exponer este equipo a la lluvia o a la humedad

´

´

!

– 5 –

ACHTUNG – WICHTIGE SICHERHEITS – INFORMATIONEN

1. INSTRUKTIONEN LESEN

Alle Sicherheits- und Operationshinweise Ihres Hafler
Equipments sollten vor der Inbetriebnahme gelesen werden.

2. BETRIEBSANLEITUNG AUFBEWAHREN

Bewahren Sie die Bedienungsanleitung sorgfältig auf, damit Sie
in dieser auch in Zukunft nachschlagen können.

3. WARNUNGEN BEACHTEN

Alle Warnungen des Gerätes und der Bedienungsanleitung sind
extrem wichtig und müssen befolgt werden.

4. INSTRUKTIONEN BEACHTEN

Alle Operations- und Gebrauchshinweise sind extrem wichtig
und müssen beachtet werden.

5. HITZE

Das Equipment sollte fern von Hitze ausstrahlenden Geräten
aufgestellt werden, wie z.B. Heizungen, Öfen etc.

6. VENTILATION

Das Equipment sollte so aufgestellt werden, dab eine ausre­ichende Ventialition gewährt wird.

7. WASSER UND FEUCHTIGKEIT

Das Equipment sollte nicht im oder in der Nähe von Wasser
benutzt werden, wie z.B. in Schwimmbädem, Saunen etc. Es
sollte ebenfalls nicht in Überschwämmungsgefährdeten
Gebieten aufgestellt werden, wie z.B. Kellerräumen.

8. STROMANSCHLUb

Das Equipment darf nur an eine Stromversorgung
angeschlossen werden, die die gleichen Parameter aufweist,
welche auf der Rückseite, über em Anschlubterminal des
Gerätes, aufgelistet sind.

9. SCHUTZ DER ZULEITUNG

Die Zuletungen sollten so verlegt werden, dab diese nicht in
den Bewegungsbereich anderer Möbelstücke oder Personen
hereinragen. Achten Sie darauf, das das Kabel nicht
gequestscht oder durchschnittren wird, wie z.B. unter
Schränken oder an scharfen Kanten etc.

10. MASSEANSCHLUb

Das dreiadrige Anschlubkabel ist mit einem Erdungsleiter aus­gestattet, welcher die Risiken eines Elektroschocks verringert.
Das Kabel hat eine Länge, welche für die meisten
Anwendungen völlig ausreicht. Wenn Sie Verlängerungskabel

benutzen, achten Sie darauf, das dies die erforderlichen Ströme
bertragen können. Benutzen Sie immer dreiadrige
Verlängerungskable.

11. ZEITRÄUME IN DENE DAS GERÄT NICHT GENUTZT WIRD

Wird das Gerät über einen längeren Zeitraum nicht genutzt
(z.B. Urlaub), ziehen Sie bitten den Netzstecker aus der
Steckdose.

12. REINIGEN

Reinigen Sie das Gerät nur, wie in der Bedienungsanleitung
detailliert beschrieben.

13. EINDRINGEN VON FREMDKÖRPERN

Achten Sie darauf, dab weder Fremdkörper, noch Flüssigkeiten
in das Gerät eindringen.

14. ERFORDERLICHER REPARATURSERVICE

Hafler Equipment sollte nur von qualifizierten Service­Technikern instand gesetzt werden, wenn:

A. Das Stromversorgungskabel beschädigt wurde
B. Eine Flüssigkeit in das Gerät eingedrimgem ist
C. Das Gerät Regen ausgesetzt wurde
D. Das Gerät nicht mehr ordnungsgemäb funktioniert, ggf.

nicht mehr die volle Leistung abgibt
E. Das Gerät runtergefallen ist oder das Gehäuse beschädigt

wurde

15. SERVICE

Der Benutzer sollte nur den Service ausführen, der in der
Bedienungsanleitung für den Benutzer freigegeben wird. Den
weiterführenden Service sollte nur von qualifizierten Tevhnikern
durchgeführt werden.

16. AUFSTELLUNG

Das Equipment sollte so aufgestellt werden, dab der gewählte
Untergrund die erforderliche Stabilität aufweist, so dab eine
gefahrlose Bnutzong gewährleistet wird.

Das Equipment und der Untergrund sollte mit äuberster
Vorsicht bewegt werden. Bei schnellen Bewegungen oder
starkem Abbremsen, kann es zum Umkippen des Equipments
kommen.

Der Blitz mit dem Pfeil, in einem gleihschenkligen Dreieck, soll
den benutzer vor unisolierter “gefährlicher Spannung” innerhalb
des Gerätes warnen.

Das Ausrufezeichen, in einem gleichschenkligen Dreieck, soll
den Benutzer darauf aufmerksam machen, dab dem Gerät
wichtige Operations - und Service - Informationen beigefügt
sind.

ACHTUNG

GEFAHR EINES

ELEKTRISCHEN SCHLAGS

Um die gefahr eines elektroschocks oder feuer zu

¨

NICHT OFFNEN

WARNUNG:

!

¨

– 6 –

ATTENTION: INFORMATIONS IMPORTANTES DE SÉCURITÉ

1. LIRE LES INSTRUCTIONS

Le mode d'emploi et les mesures de sécurité de votre
équipement Hafler devraient être consultés avant sa mise en

marche.

2. CONSERVER LE GUIDE DE L'UTILISATEUR

Le mode e'emploi et les mesures de sécurité devraient être
conservés pour des références futures.

3. CONSIDÉRATIONS DE MISE EN GARDE

Le mode d'emploi et les mises en garde concernant cet
équipement sont de grande importance et devraient être suivis.

4. SUIVRE LE MODE E'EMPLOI

Le mode d'emploi et les conseils d'utilisation sont importants et
devraient être suivis.

5. CHALEUR

Le matériel devrait être préservé loin de toute source de
chaleur: radiateurs, cuisinière/fours, cheminées,…etc.

6. VENTILATION

Le matériel devrait être utilisé dans un endroit à bonne ventila­tion. Il reste nécessaire de respecter la circulation de flux d'air à
l'intérier et autour du meuble.

7. EAU ET HUMIDITÉ

Le matériel ne devrait pas être utilisé près d'une source d'eau,
telle qu'une baignoire, un évier, ou une aire de baignade. De
plus, le matériel ne devrait pas être utilisé dans des lieux sujets
aux innondations, tels que les sous-sols.

8. SOURCES D'ÉNERGIE

Le matériel devrait seulement être relié à une source d'énergie
de même voltage et fréquence que celle indiquée sur le tableau
arrière, au dessus de la fiche d'entrée de la prise de courant.

9. PROTECTION DE LA PRISE DE COURANT

La prise de courant devrait être arrangée de façon à ne pas
interférer avec le déplacement d'objets (chariots, pales de ven­tillateurs…etc.) ou de personnes à l'intérieur de la pièce.
D'autre part, il faudrait faire tres attention à ce que la prise ne
soit pas percée ou coupée, ou disposée de façon à risquer de
l'être, comme sous un tapis, autour d'un angle pointu…etc.

10. PRISE DE COURANT ÀTROIS FICHES

La prise de courant est composée de trois fiches, désignées à
réduire le risque de décharge électrique de l'appareil.

Elle devrait être de longueur suffisante pour la plupart des utili-

sations de ce matériel. L'utilisation de rallonge t d'adaptateur
est déconsellée à moins dêtre en mesure de fournir la charge
électrique requise à un fonctionement sans risque, de tout
matériel relié.

11. PÉRIODES DE NON-UTILISATON

Durant les périodes de non-utilisation, la prise de courant ne
devrait pas être branchée à une source d'energie.

12. NETTOYAGE

Le matériel devrait être nettoyé en respectant les instructions
indiquées.

13. PENETRATION DES LIQUIDES

Un attention particulière est éxigée quant à la dispersion de liq­uides tels que les produits de nettoyage et boissons, de façcon
à éviter toute pénetration dans l'enceinte du matériel.

14. DÉGÂT NÉCESSITANT UNE RÉVISION

Le matériel Hafler devrait être révisé par des personnes qual­ifées de service après-vente, lorsque:

A. Les fiches ou la prise de courant ont été endommagé, ou:
B. De objets sont tombés sur le matériel, ou des liquides s'y

sont dispersés, ou:
C. Le matériel a été exposé à la pluie, ou:
D. Le matériel ne semble pas fonctioner correctement, ou

affiche un changement de performance, ou:
E. Le matériel a été renversé à terre, ou l'enceinte a été

endommagée.

15. REVISION

L'utilisateur ne devrait pas essayer de réviser le matériel en
allant plus loin que ce qui a été décrit dans le mode d'emploi.
Toute autre réviion devrait être confiée à un personnel qualifié.

16. CHARRIOTS ET MEUBLES

Le matériel devriat être utilisé avec des charriots et meubles de
qualité et stabilité suffisante à son utilisation préconçue.

L'ensemble du matériel et du charriot devrait être déplacé avec
précaution. Des mises en marche et arrêts brusques, des colli­sions excessives ainsi que des surfaces inégales peuvent ren­verser l'ensemble du matériel et du charriot.

La lumière clignotante du symbole de la flêche à l'intérieur d'un
triangle équilatéral, à pour objet d'alerter l'utilisateur de la
présence “d'un voltage dangereux” non-isolé à l'intérieur du pro­duit, qui pourrait être de magnitude suffisante au risque d'éléc-
trocution.

Le point d'exclamation, à l'intériur d'un triangle équilatéral, à
pour objet de prévenir l'utilisateur de l'importance des instruc­tions de fonctionement et de maintenance, jointes à l'appareil.

ATTENTION

RISQUE DE CHOC

´

ELECTRIQUE NE PAS OUVRIR

Afin de prevenir les risques de feu ou de choc, ne pas

´

exposer cet appareil a la pluie ou a l'humidité

AVERTISSEMENT:

´

´

!

– 7 –

NOTARE – IMPORTANTI INFORMAZIONI SULLA SICUREZZA

1. LEGGETE LE ISTRUZIONI

Tutte le istruzioni riguardanti la sicurezza ed il funzionamento
devono essere lette prima di applicare tensione all'apparato.

2. CONSERVATE IL MANUALE

Queste istruzioni riguardanti la sicurezza ed il funzionamento
devono essere conservate come riferimento futuro.

3. AVVERTENZE

Tutte le avvertenze poste sull'apparato e sul libretto di istruzioni
sono importanti e devono essere seguite.

4. SEGUIRE LE ISTRUZIONI

Tuttle le istruzioni operative e di funzionamento devono essere
seguite.

5. TEMPERATURA

L'apparato deve essere mantenuto lontano da tuttle le zone ad
alta temperature, termosifoni, termoconvettori, stufe e forni,
caminetti ed altro.

6. VENTILAZIONE

L'apparato deve essere posizionato in aree convenienti per una
corretta ventilazione. Prestare attenzione che sia consentita cir­colazione d'aria attorno e dentro il cabinet.

7. ACQUA E POLVERE

L'apparato deve essere posizionato lontano da zone contenenti
acqua, come vasche a bagno, acquari e piscine. Inoltre non
deve essere impiegato in aree soggette ad allagamento, come
le cantine.

8. REQUISITI DI ALIMENTAZIONE

L'apparato deve essere connesso solo ad un'alimentazione
della stessa tensione e frequenza di quanto scritto sulla parte
posteriore del telaio.

9. PROTEZIONE DEL CAVO DI ALIMENTAZIONE

Il cavo di alimentazione deve essere posizionato in modo di
non interferire con il movimento di oggetti nella stanza: per­sone, ventilatori, carrelli, ecc…prestate attenzione anche che il
cavo non sia tagliato o spellato e che non possa tagliarsi e
spellarsi.

10. MESSA A TERRA

Il cavo di alimentazione è del tipo a tre fili con terra ed è proget­tato pr ridurre il rischio di shock elettrici. Si presume che sia
della lunghezza sufficiente per la maggior parte degli impieghi.
L'impiego di prolunghe e adattatori è sconsigliato se questi non
garantiscono la potenza sufficiente per i corretto fuinzionamento

degli apparati connessi. E altersì importante che vengano
sempre impiegate prolunghe con la configurazaione a tre fili
con terra.

11. PERIODI DI NON UTILIZZO

Durante lunghi periodi di non utilizzo, staccare il cavo di alimen­tazione.

12. PULIZIA

L'apparato deve essere pulito solo come indicato dalle
istruzioni.

13. INGRESSO DI OGGETTI E LIQUIDI

Si deve prestar attenzione che oggetti e liquidi, come fluidi
detergenti e bibite, non vengano versati all'interno dell'apparato.

14. RIPARAZIONI

Gli apparati Hafler devono essere riparati da personale qualifi­cato quando:

A. Il cavo di alimentazione o la spina sono danneggiati
B. Oggetti sono caduti all'interno del telaio o quando del liqui-

do è entrato
C. Quando l'apparato è stato esposto a pioggia
D. Quando l'apparato non sempra funzionare normalmente o

quando esibisce un cambiamento di prestazioni o
E. Quando è caduto o il telaio è stato danneggiato

15. ASSISTENZA

L'utente non deve tentare di prestare assistenza all'apparato,
se non per quanto esposto nelle istruzioni. Tutti gli altri interven­ti devono essere effettuati da un tecnico specializzato.

16. CARRELLI E STAND

L'apparato deve essere impiegato su carrelli o stand solo se
questi sono sufficientemente solidi e stabili per la funzione a cui
si vuole dedicarli.

La combinazione di carrello ed apparato deve essere mossa
con cautela. Fermate e partenze improvvise, forze eccessiva e
superfici irregolari, possono ribaltare la cominzione carrello e
apparato.

Il simbolo del fulmine in un triangolo equilatero vuole avvertire
della presenza di tensioni elevate non isolate e di valore suffi­ciente per costituire rischio di shock elettrico alle persone.

Il punto esclamativo contentuto in un triangolo equilatero vuole
avvertire l'utente della presenza di parti di servizio e di
manutenzione che sono dettagliate nel manuale di istruzioni.

ATTENZIONE

ATTENZIONE:

RISCHIO DE SCARICHE

ELETTRICHE NON APRIRE

ATTENZIONE:

Per prevenire incendio scariche elettriche, non esporre

!

– 8 –

All measurements taken at Normal Operating Conditions (i.e. 1/8th rated output power) unless noted otherwise.

POWER RATING:

8Ω 20-20kHz @ 0.1% THD 300W x 2 CH 600W x 2 CH
4Ω 20-20kHz @ 0.2% THD 300W x 2 CH 600W x 2 CH
2Ω 20-20kHz @ 0.3% THD 300W x 2 CH 600W x 2 CH
70V 20-20kHz @ 0.2% THD 600W x 1 CH 1200W x 1 CH
100V 20-20kHz @ 0.2% THD 600W x 1 CH 1200W x 1 CH
Bridged 8Ω 20-20kHz @ 0.2% THD 600W x 1 CH 1200W x 1 CH
Bridged 4Ω 20-20kHz @ 0.3% THD 600W x 1 CH 1200W x 1 CH

FREQUENCY RESPONSE: 10Hz-20kHz +/–0.1dB 10Hz-20kHz +/–0.1dB

0.2Hz-100kHz +/–3dB 0.2Hz-100kHz +/–3dB

INPUT SENSITIVITY:

8Ω 0.9V 1.3V
4Ω 0.6V 0.9V
2Ω 0.45V 0.6V

MAX. INPUT: 3.0V 3.0V

SIGNAL-TO-NOISE: >100dB “A” WGT >100dB “A” WGT

CMMR: >75dB at 1kHz >75dB at 1kHz

INPUT IMPEDANCE: 47kΩ per phase balanced 47kΩ per phase balanced

DAMPING FACTOR: >500 >500

POWER/THERMAL REQUIREMENTS:

Idle Condition* 55W 70W

“U” version 860mA @ 115VAC 1.0A @ 115VAC
“CE” version 430mA @ 230VAC 500mA @ 230VAC

Thermal Dissipation 190 BTU/hr 240 BTU/hr

Normal Operating Condition (1/8 rated power, pink noise) 280W 490W

“U” version 3.5A @ 115VAC 5.8A @ 115VAC
“CE” version 1.7A @ 230VAC 2.9A @ 230VAC

Thermal Dissipation 680 BTU/hr 1160 BTU/hr

Worst Case (1/3 rated power, pink noise) 550W 1000W

“U” version 6.6A @ 115VAC 12A @ 115VAC
“CE” version 3.3A @ 230VAC 5.9A @ 230VAC

Thermal Dissipation 1200 BTU/hr 2080 BTU/hr

FUSE:

"U" version (115VAC nominal) 7A, 3AG Slo-Blo, 2 ea. 15A, 3AG Slo-Blo, 2 ea.
"CE" version (230VAC nominal) T5A, 5 x 20mm, 2 ea. T6.3A, 5 x 20mm, 2 ea.

MAINS POWER VOLTAGE:

"U" version

100-140VAC, 50-60Hz 100-140VAC, 50-60Hz

"CE" version

200-260VAC, 50-60Hz 200-270VAC, 50-60Hz

GX2600GX2300

Specifications

*both channels driven at rated power

The Hafler GX2300 and GX2600 amplifiers are two rack height, two channel, fan-cooled professional power amplifiers
suitable for use in the most demanding sound reinforcement and commercial sound installations. These amplifiers offer out­standing efficiency by means of three technologies: high-efficiency Class-G Tri•nova amplifiers, high-frequency switching
power supplies, and constant power output/load impedance selection switches. Crossover, Time Delay, Phase and CD
Equalization features make the GX2300/2600 especially useful in 2-way cinema applications.

Introduction

Technical Design Features

WHY A NEW AMPLIFIER TOPOLOGY?

Hafler TRANS•nova amplifiers, the recording studio reference, have a floating +/- power supply for each channel and a
Nodal drive system covered by U.S. Patents 4,467,288 and 5,567,000. Our challenge was to convert this topology into a
high efficiency design with minimal increase in complexity-yielding an amplifier of outstanding audio qualities, high effi­ciency and unprecedented value. Tri*•nova is the answer.

The most common high-efficiency (Class-H) methods raise the rail voltages going to the output devices for higher power
levels. Tri•nova does not do this. Instead, it operates by forming a triplet or triplex of tracking signals: A, (A+V) and (A–V),
where A is the raw audio output and +/– are the floating rails. The amplifier final output is selected to be at an appropriate
voltage between (A+V) and (A–V) for each condition of the signal. The output voltage and current capability are each
potentially doubled and the power potentially quadrupled–without having to increase the rail voltages fed to the devices.
One or more patents are expected from this technology.

– 9 –

Specifications

(cont)

DIMENSIONS: (2U) 3.5H" x 19"W x 18.5"D (2U) 3.5H" x 19"W x 18.5"D

(rack handles add 1.25"D) (rack handles add 1.25"D)

WEIGHT: 32lbs. (14.51 kg) 32lbs. (14.51 kg)

100v

8Ω

Load

100v

8Ω

70V

70V

4Ω

4Ω

2Ω

2Ω

CH A

Power

CH B

2300

signal

Channel A

clip

Channel b

protect

Stereo Mono

thermal

70V

100V

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-38

F

F

O

0dB

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-38

F

F

O

0dB

– 10 –

WHAT ELSE DISTINGUISHES THESE AMPLIFIERS?

Constant power into varying impedance. It takes twice as much current to develop a given wattage into 2Ω as it does into
8Ω—but only half the voltage. Many amplifiers quote a high output current at 2Ω but have an unpublished operating time
measured in a handful of seconds—before thermal shutdown (hopefully) precludes thermal meltdown.

Our solution for this is selectable rail voltages for optimizing the amplifier to the load. This is impractical for conventional
line-frequency supplies—and it comes at a cost for switching supplies. A full PWM design is needed, adding a coupled out­put inductor, a current-sense transformer and a current-mode controller IC. An impedance selector switch is also needed
for each channel, simultaneously altering the rail voltage and the current limit. Each channel of the amplifier can be inde­pendently optimized for 2Ω, 4Ω, and 8Ω, useful in bi-amping and tri-amping, etc. Both 70 and 100 volt constant voltage
line operation are possible. A chart on the back of the amplifier explain the various options.

UNIVERSAL LINE VOLTAGE INPUT

Voltage selection is provided in two bands: 100-140 volts and 200-260 volts, (both 50/60 Hz) via two quick-connect termi­nals located on the EMI filter board, accessed by removing the top cover. The current-mode control system automatically
corrects for the bulk of power line variation with each band. This allows most of the PWM action to be reserved for pro­gramming and regulation of output voltages. A flyback topology provides the numerous housekeeping low voltages required
by various circuits.

PROTECTION CIRCUITS

Fan control circuit - Each amplifier channel has a fan control circuit that measures the temperature of the heatsink, and
adjusts the fan speed accordingly. This thermally-tracking fan speed circuit keeps fan noise to a minimum when power
demands are low. Typically the fans will be turning slowly even at idle conditions - although abnormally low room temper­atures may allow the fans to turn off completely. The fan control circuit also has a turn-on blast feature that runs the fans at
full speed for a few seconds every time the amplifier is turned on. This serves the dual function of cleaning out the air tun­nel, and providing a simple means to check the fans for proper operation. If you suspect that the fans are not operating cor­rectly, try turning the amplifier off, then listening or feeling for the turn-on blast when the amplifier is turned back on.

Thermal Standby - If excessive heatsink temperature is detected, the individual amplifier channel will go into thermal stand­by mode. The amplifier will be turned off, and the THERMAL LED illuminates until heatsink temperatures return to normal.
At that time the amplifier automatically turns back on, and continues operating normally.

NOMAD protection - The amplifier output MOSFETs are protected from excessive power dissipation by NOMAD protec­tion circuitry. NOMAD (Non-Multiplying Advance Decision) limits the power when it measures signal voltage and current
conditions that will exceed the pre-determined power limit of the MOSFETs. This instantaneous power calculation is per­formed on each output MOSFET, causing the amplifier to automatically limit power when needed. In this way, a speaker
load with an impedance “dip” over a particular frequency range will only activate the NOMAD protection when sufficient
audio is present at that same frequency range, but continue operating normally otherwise.

Short protection - The NOMAD protection circuit also protects against shorts, and will instantly limit the output power if
speaker wires are shorted together. Normal operation will continue immediately after the short is removed.

Power Supply Current Limiting protection- The switching power supply will protect itself from excessive power dissipation
by continuously monitoring currents in the switching MOSFETs. The Current Limiting circuit measures the currents in the
switching MOSFETs and will instantly limit them to a safe level.

Soft turn-on/fast turn-off - Speaker loads are protected from turn-on/turn-off transients by a circuit that monitors the power
supply, and controls the amplifier when power on/off events are detected. At turn-on, this circuit waits for power supply
voltages to settle, then sends a turn-on ramp signal to slowly turn the amplifier on. At turn-off, this circuit acts quickly to
turn off the amplifier before power supply capacitors discharge, and voltages collapse into the output signal - causing
speaker “pops”.

– 11 –

1. Recessed Front Panel - Prevents switches and controls from acci-

dentally being adjusted or broken.

2. Power Switch - Turns the amplifier ON and OFF

3. Power LEDs - Verifies that the amplifier channel is ON

4. Status LEDs - Displays the status of the amplifier. The LEDs are as

follows: SIGNAL indicates if signal is present; CLIP illuminates if
the amplifier is being overdriven; PROTECT illuminates if the
amplifier is experiencing a “short” in the speaker array; THER­MAL illuminates if the amplifier has shut down due an overheat­ing condition.

5. Female XLR & 1/4" TRS Input Jacks - Feeds input signal to the

amplifier using industry standard male XLR or 1/4" TRS
(tip/ring/sleeve) plugs.

6. Crossover/Delay/Phase/CD EQ - Each channel is

configurable for typical 2-way speaker systems.

7. Stereo/Mono Switch - This dual purpose switch is used to select

the operating mode of the amplifier. In Stereo mode the amplifi­er can be configured for standard 2-channel stereo operation. In
Mono mode the amplifier can be configured for Standard Bridge
mono, 70V mono or 100V mono operation.

Turn amplifier off

before operating this switch.

8. Level Controls - Adjusts the gain of the amplifier.

9. Load Switch - Selects the speaker impedance or transformer voltage

that will be connected the output binding posts. In Standard Mode
the amplifier can drive 2Ω, 4Ω or 8Ω
speaker loads. In Constant Voltage Mode the amplifier can drive an
array of speakers using 70V or 100V transformers.

10. Output Binding Posts - Connects the speaker array to the ampli-

fier. These jacks allow bare wire, spade lugs or dual banana
plugs to be connected to the amplifier.

11. Internal Fans - internal fans keep the amplifier circuitry cool.

Allow a minimum of 3" clearance on the front and back of the
amplifier vents for adequate ventilation.

12. Chassis/Float ground switch - Isolates Audio GND and helps

eliminate noise in the signal chain. With the switch in “Chassis”
position, the Audio GND is connected to chassis ground. In the
“Float” position, the Audio GND is isolated (floating) from the
chassis.The chassis is permanently connected to earth (safety)
ground.

13. Mains Power Fuse - Protects the “mains” electrical circuit in

case abnormal current draw from the amplifier is experienced.

14. Mains Power Connector - Connects AC Voltage to the amplifi-

er. The power connector is safety approved IEC type 320. The
earth (safety) ground pin of the power connector is permanent­ly connected to the chassis. This connection is capable of
shunting in excess of 30A of fault current.

15. Stereo/Biamp Switch - This dual purpose switch selects either

standard 2-channel stereo mode or 1-channel in, 2 channels
out Biamp mode.

Turn amplifier off before operating this

switch.

16.

16.

Removable Rear Panel

Removable Rear Panel - 8 screws can be removed to service

fans and internal components without unracking the amplifier.

Design Features

1 9

2 3

4 7 8

5 15

6 10

11

14

16

12

13

70V

4Ω

100v

8Ω

2Ω

CH A

100v

8Ω

Load

70V

Power

4Ω

2Ω

CH B

2300

signal

clip

Channel A

prot

Channel b

ect

thermal

Stereo Mono

70V
100V

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-38

OFF

B

0d

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-38

OFF

B

0d

180˚

–

CH A

IN

BIAMP STEREO

CH B

IN

(Mono)

HP –

Crossover

LP –

Full –

2

CD EQ

+0

+10 dB

500Hz –

Freq

800Hz –

HP

–

LP –

Crossover

Full –

2

+0

CD EQ

+10 dB

500Hz –

Freq

800Hz –

Delay

0˚–

must

choose

Phase

6

6

one

only

0”­6”-

Audio GND

12”-

Chassis

Float

18”­24”­30”-

ON

180˚

–

0˚–

Phase

Delay

0”­6”-

must

12”-

choose

18”-

one

24”-

only

30”-

ON

Mono,70V,100V

4Ω– 16Ω

600W

—

+

Class 2 wiring

—

300W

2Ω – 8Ω

+

+

—

300W

2Ω – 8Ω

A Division of
Rockford Corp.

®

3

250W
115V~

50-60Hz

00

Tempe, AZ 85281
Made in the U.S.A.

For 70V, 100V, or Mono

• Use CH B input

• Load across RED terminals

• Set load switches to one
half load impedance

Attention: Utiliser un fusible

de rechange de même type.

CAUTION: For continued
protection from risk of fire,
replace only with same type
and rating of fuse.

GX2

300 W Stereo, 2Ω– 8Ω

600W Mono, 70V,100V

250V T7A

The GX2300/2600 is a standard 2U (2 rack height) 19" rack-mount unit, with both front and rear rack mounting ears. In
portable systems, the amplifier must be supported at both the front and rear.

COOLING

The GX2300/2600 uses forced-air cooling (fan cooling) to remove the heat produced during normal operation. Free air flow
at the mounting location is a critical factor in accomplishing long-term reliable operation of the amplifier. The internal fans
of the amplifier pull in fresh (cool) air from the rear panel, and force the heated air out the front panel. This air flow must be
as open and free of obstructions as possible. Also take care to exhaust the heated air away from the front panel intakes, so
as not to recirculate and reheat the same air over and over again. In a rack system, make sure there is a significant source of
fresh air to the rack. This can be achieved with air conditioning vents to the top of the rack, an open back that is well venti­lated, or rack panel fans/vents. In the case of rack panel fans/vents, the cooling will be most effective when the amplifier(s)
are located as far away from the fans/vents as possible, to prevent air recirculation i.e. amplifiers at the bottom, fans/vents at
top or vice-versa.When installing equipment in a rack, take care that the weight is distributed evenly. Hazardous conditions
may be created by uneven weight distribution.

POWER/THERMAL REQUIREMENTS

For your convenience in planning for sufficient power and cooling in the amplifier environment, we have included AC
mains current draw and thermal dissipation values in the Specifications Sheet. The specifications listed are for idle (no sig­nal),

1

/8th power (“normal operating conditions” for continuous voice or music), and 1/3rd power (worst-case hard-clipped

music) for an amplifier with both channels driven. The thermal dissipation specifications indicate how much heat will have
to be removed from the amplifier environment under the three different conditions.

NOISE

The GX2300/2600 exceeds all relevant international emissions and immunity standards, and has further been specifically
designed to minimize interference in Pro-Audio environments. Regardless of this fact, amplifiers consume, process and
deliver significant amounts of power over a wide frequency range. Standard practice calls for caution to be exercised in the
placement of signal cables and signal-level components such as mic preamps, tuners, etc., to avoid inducing noise in the
low level circuitry. Possible sources of noise are: AC current in shared power lines, magnetic interference between adjacent
rack-mount units, high current audio speaker cables. In general avoid the following:

Mounting sensitive signal processing equipment directly above or below amplifiers.

Sharing AC power outlets between amplifiers and signal processing equipment.

Bundling signal cables with speaker cables or AC power cords.

AC LINE

Connect the unit to a properly rated supply circuit. The GX2300/2600 can be configured to operate within the following AC

mains voltage ranges:

100-140VAC, 50-60Hz (115VAC, 60Hz typ.)

200-260VAC, 50-60Hz (230VAC, 50Hz typ.)

Connection is made by 14 gauge, IEC type 320, grounded line cord. For safety considerations only a properly grounded

(earthed) receptacle should be used. If a grounded circuit is not available, do not break off the ground pin; use the proper

adapter plug for a two wire receptacle. The AC mains fuse is accessible at the rear panel of the amplifier. If this fuse blows

replace it only with the same type and rating fuse. The correct replacement fuse value is printed on the rear of the amplifier,

and on the specifications page.

– 12 –

Installation

!

!

– 13 –

AUDIO GROUND CHASSIS/FLOAT SWITCH

In general, the Audio Ground of each amplifier should be connected to AC mains earth ground AT ONE POINT ONLY-

either through the Chassis (by selecting the "Chassis" position) OR through the input cable (with the switch in the "Float"

position, and pin 1 of the XLR or the sleeve of the

1/

4

" connected to the ground of the signal source unit.)

The Chassis/Float switch can be used as a means to troubleshoot ground loop problems, or to verify wiring. Ground loops

are characterized by a hum or buzz through the speakers, and occur when multiple paths exist for a given ground circuit.

This switch allows the Audio Ground to be temporarily "lifted" or "floated" from the chassis, so continuity tests can be made

to verify or reverse-engineer a grounding system. The following information will be useful when planning or troubleshoot-

ing system wiring:

• The chassis is permanently connected to the earth (safety) ground pin of the Mains power connector.

• The Audio Ground of each GX2300/GX2600 is permanently connected to the black terminals of both output binding

posts, to pin 1 of each XLR input, and to the sleeve of each

1

/

4

" input.

• The XLR shell is permanently connected to chassis.

• With the Chassis/Float switch in the "Chassis" position, the Audio Ground will be connected to the Chassis and AC mains

earth ground. This connection is made through a 0Ω resistor (R350) located on the input board. The resistor serves as a

fuselink in the case of severe system faults. To check this resistor, remove all connectors from the amplifier and discon-

nect the AC main plug. With the switch in the "Chassis" position, use an ohmmeter to measure the 0Ω resistance between

the earth ground pin of the AC mains plug and Audio Ground at either black terminal of the output binding posts.

• By selecting the “Float” position, the Audio Ground is not directly connected to the chassis, and can be referenced to

some other ground through the input cable or speaker ground. For safety reasons, a 0.1µF capacitor (C125) permanently

connects Audio Ground and chassis. C125 is located on the input board. The 0.1µF capacitor couples Audio Ground to

chassis at RF frequencies, but only presents approximately 27kΩ of impedance at 60Hz.

OUTPUT

The speaker output connectors are dual binding posts which will accept wire up to 12 AWG, or spade connectors. They are

spaced on

3

/

4

" centers for use with dual banana plugs. The positive output red terminals are oriented such that a dual

banana plug can be used for bridged mono operation.

POWER SWITCH

The power switch is located on the front of the amplifier. Two green "Power" LEDs indicate that the corresponding amplifier

channel is turned on. Standard practice is to turn the amplifier on last, and off first when powering your system on and off.

This insures that any turn on/off glitches in source components or signal processing equipment will occur before the ampli-

fier is turned on, or after it is turned off. It is possible to leave the power switch on at all times and switch the amplifier

remotely with a breaker switch or other AC power switch. When doing so make sure the switch is rated for the current

required by the amplifier.

!

– 14 –

The amplifier will operate with either a balanced or unbalanced signal source.

INPUT

The input jacks used on the GX2300/2600 are dual function connectors which accept

1

/

4

" TRS (Tip Ring Sleeve) or male
XLR plugs. The amplifier will operate with either a balanced or unbalanced signal, from earth ground or floated source
equipment. To determine if your equipment is earth grounded or floated, consult the owner’s manual or test with an ohm­meter.

The signal connections are as follows:

Proper cable wiring will be determined by the source equipment that is feeding signal to the amplifier.

EARTH GROUNDED SOURCE EQUIPMENT

Source units with a 3-pin mains power cord will typically have the audio output ground connected to the earth-grounded
chassis. This can be verified with an ohmmeter by disconnecting the mains power cord from the AC outlet and checking for
continuity between the earth ground pin and the audio output ground. This test should be done with the equipment
installed in the complete system, including cables. If the audio output ground is connected to the earth ground pin, it is

earth grounded equipment.

Consult the following diagrams for examples of recommended wiring techniques:

Operation

1/4" Mono Unbalanced1/4" TRS BalancedXLR Balanced

Tip Ring Sleeve Tip Sleeve

sleeve shorts amplifier

— input to audio ground

GROUNDED,
BALANCED
SOURCE

GROUNDED,
UNBALANCED
SOURCE

SHIELDED TWISTED PAIR

shield connected at one end only

SHIELDED TWISTED PAIR

shield connected at one end only

Shield

Shield

XLR, 1/4" TRS Amplifier

XLR, 1/4" TRS Amplifier

2

3

1

2

3

1

Audio

Ground

Chassis

Audio

Ground

Chassis

– 15 –

FLOATED SOURCE EQUIPMENT

Source units with a 2-pin mains power cord have no means to connect the audio output ground to earth ground, so usually
the audio output ground is floated from earth ground. However, this does not insure that when installed in a system, the
audio output ground will remain floated from earth ground. The input cable to this equipment may already be connected to
earth ground earlier in the audio chain, and it will typically be carried straight through to the output. It is also possible that
the audio output ground connects to the earth ground through the chassis to an earth-grounded rack. The only way to know
for sure is to test the installed system. Use an ohmmeter to check for continuity between the earth ground socket of the
mains power receptacle and the audio output ground. If the audio output ground is not connected to earth ground, it is

floated equipment.

Consult the following diagrams for examples of recommended wiring techniques:

GROUNDED,
UNBALANCED
SOURCE

COAX OR TWISTED PAIR

Shield

1/4" Mono: sleeve shorts

— input to Audio Ground;

XLR: short pins 1 & 3 together

XLR, 1/4" Mono Amplifier

2

3

1

Audio

Ground

Float

FLOATED,
BALANCED
SOURCE

FLOATED,
UNBALANCED
SOURCE

FLOATED,
UNBALANCED
SOURCE

SHIELDED TWISTED PAIR

shield connected at both ends

SHIELDED TWISTED PAIR

shield connected at both ends

COAX OR TWISTED PAIR

XLR, 1/4" TRS Amplifier

Shield

XLR, 1/4" TRS Amplifier

Shield

XLR, 1/4" Mono Amplifier

Shield

1/4" Mono: sleeve shorts

— input to Audio Ground;

XLR: short pins 1 & 3 together

2

3

1

2

3

1

2

3

1

Audio

Ground

Chassis

Audio

Ground

Chassis

Audio

Ground

Chassis

– 16 –

DELAY

(One of these switches must be selected. If all the switches are OFF, there will be no output signal.)

The delay feature provides five sections of 2nd-order all-pass delay filters of 450µsec +/-10µsec each. Unlike the more
commonly used 1st-order all-pass, the 2nd-order filters achieve a constant delay time over the usable frequency range
of 1Hz to 1kHz. At frequencies higher than 1kHZ, the gain remains flat, while the delay time gradually decreases to zero.

The delay time is labeled in inches of delay (i.e. 450µsec/section X 1130ft/sec X 12 inches/ft = 6 inches/section). If there
is uncertainty about the amount of delay needed, choose the 0” switch.

CD HORN EQUALIZATION

This adjustable high-frequency shelving circuit can be used to compensate for the roll-off of constant directivity (CD)
horns. At the +10dB setting, the gain increases with frequency to about +3dB at 3kHz, and finally to +12dB at 20kHz.

CROSSOVER

A 3-position slide switch selects the High-Pass (HP), Low-Pass (LP), or Full-Range (Full) configuration of the 4th-order
crossover.

FREQUENCY

The crossover frequency can be selected as either 500Hz or 800Hz.

PHASE

The Phase switch will select either 0° (normal polarity) or 180° (inverted polarity) for the corresponding output signal.

+10dB

6

2

– 17 –

LEVEL CONTROLS

The gain for each channel can be controlled individually using the front panel level control. The controls have 32 detented
positions that are calibrated in dB. The maximum gain position is marked as the "0 dB" position, and the lower gain posi­tions indicate the amount of attenuation relative to the maximum gain position in dB. Minimum gain position is marked as
“Off” and represents over 100dB of attenuation relative to the maximum gain position.

The CH B level control is used for all Bridged Mono configurations, and 100V and 70V modes (Except for GX2600 Dual
70V mode).

each channel. See diagrams

The Stereo/Biamp switch is defeated whenever the front panel Stereo/Mono switch is in the Mono position. In this case, the
Stereo/mono switch overrides the Stereo/Biamp switch, and the amplifier operates in mono mode.

STEREO/BIAMP SWITCH

Turn amplifier off before operating this switch. This switch is located on the rear panel and selects either:

Stereo mode- 2 input signals and 2 output signals.

Biamp mode- 1 input signal and 2 output signals.

Biamp mode is useful if a mono signal needs to be distributed to speakers of differing impedance or power level. The load
switch for each channel can be selected for the appropriate load, and the level controls can be adjusted individually for
each channel. See diagrams

The Stereo/Biamp switch is defeated whenever the front panel Stereo/Mono switch is in the Mono position. In this case, the
Stereo/Mono switch overrides the Stereo/Biamp switch, and the amplifier operates in Mono mode.

STEREO/MONO 70V 100V SWITCH

Turn amplifier off before operating this switch. This switch will override the Stereo/Biamp switch.

This Stereo/Mono 70V 100V switch is located on the front panel and selects either:

Stereo mode- 2 input signals and 2 output signals.

Mono, 70V, 100V mode- 1 input signal and 1 bridged output signal.

Mono mode uses the CH B input connector and level control only. The output load should be connected across the red ter­minals of the output connectors. Set both load switches equal to 1/2 the load value. For example, after connecting a 4Ω
load across the red terminals, set both load switches to 2Ω. The rated power into the mono load will be double the rating
for a stereo load. See diagram

70V and 100V Mono mode also use the CH B input connector and level control only. The 70V or 100V speaker array load
should be connected across the red terminals of the output connectors. Set both load switches to the appropriate 70V or
100V value. The rated power into the mono load will be double the rating for a stereo load. See diagram

PROTECT

The red "Protect" LED on the front panel indicates that the NOMAD protection circuit has been activated, and is limiting
the output power of the amplifier. This indicates that during the “Protect” event, the NOMAD circuit detected a speaker
load that was temporarily significantly lower than the value selected with the load switch. Typically it may only occur when
a transient signal corresponds to a “dip” in the speakers’ impedance curve, and will not be objectionable. However, if the
nominal speaker impedance is significantly lower than the Load Switch setting, excessive clip limiting can result, accompa­nied by continuous or prolonged illumination of the protect LED. In this situation the Load Switch should be changed to a

lower value until the “protect” events are eliminated, or occur infrequently. See “Load Switch” paragraph.

– 18 –

LOAD SWITCH

The Load Switch - located on the front panel - allows the amplifier power supply to be matched to the speaker load for
more efficient, cooler running operation.This unique feature of the GX2300/2600 allows each channel to be configured for
2Ω, 4Ω, 8Ω, or 70V, 100V mono operation. (also 70V Dual Mono-GX2600 only).

The power output and thermal performance of the amplifier remains consistent with all the possible combinations of the
loads listed. In Stereo or Biamp mode the Load switches can be configured independently, and each channel will deliver
the same consistent output power and thermal performance, regardless of how the other channel is configured. Use the fol­lowing guide when selecting the Load Switch setting:

Nominal Speaker Impedance Load Switch Setting

5Ω-8Ω or higher 8Ω

3Ω-5Ω 4Ω

2Ω-3Ω or lower 2Ω

If the “Protect” LED is illuminated for prolonged periods during normal operation, select the next lower value Load Switch
setting. Continue until the “Protect” LED ceases to illuminate, or lights infrequently. This switch can be safely operated
while the amplifier is running. In 70V or 100V mode, the “Protect” LED indicates there are too many speakers loading the
array.

THERMAL

Indicates when the thermal protection has shut down the amplifier. After cooling sufficiently, the amplifier will automatical­ly recover and continue operating.

CLIPPING

Lights up when the output or input signal reaches the maximum allowable voltage, and “clips” the output signal. Input clip­ping occurs at 3 VRMs (sine), and can be eliminated by attenuating the signal at the source unit - before it reaches the
amplifier. Output clipping can be eliminated by turning down the amplifier level control.

To determine whether the signal is clipping at the input or output of the amplifier, perform this test: Turn the amplifier con­trol all the way “OFF”. If the clipping continues, this is an indication that the signal is clipping at the amplifier input.

SIGNAL

Monitors the amplifier output and indicates when a signal of at least 1 Vrms is present. A number of situations could exist
where the input cable is properly connected to the signal source, but the Signal LED does not illuminate, such as:

Level control is not high enough to amplify the output signal to 1 Vrms.

Source signal is off, or lower than normal.

– 19 –

1. Connect signal from source to both CH A and CH B

inputs.

2. Move Stereo/Biamp switch to Stereo input mode.

3. Move Stereo/Mono switch to Stereo mode.

4. Select desired speaker load (8Ω/4Ω/2Ω) for each

channel – CH A & CH B loads do not need to match.

5. Connect appropriate speaker load 8Ω/4Ω/2Ω to 5-way
binding posts.

6. Adjust CH A & CH B level controls independently.

1. Connect signal from source to CH B input.

2. Move Stereo/Biamp switch to BIAMP input mode.

3. Move Stereo/Mono switch to Stereo mode.

4. Select desired speaker load (8Ω/4Ω/2Ω) for each
channel — CH A and CH B loads do not need to match.

5. Connect appropriate speaker load 8Ω/4Ω/2Ω to 5-way
binding posts.

6. Adjust CH A & CH B level controls independently.

Wiring Diagrams

STEREO MODE (GX2300/GX2600)

BIAMP MODE (GX2300/GX2600)

-

-

– 20 –

1. Connect signal from source to CH B input.

2. Stereo/Biamp switch not active (Stereo/Mono switch
overrides this switch when in mono/70V/100V mode).

3. Move Stereo/Mono switch to 70V mode.

4. Select 70V load, both channels.

5. Connect parallel array of 70V transformer-equipped
speakers across the red terminals of the 5-way binding
posts. (1200W–GX2600, 600W–GX2300)

6. CH B input sensitivity controls 70V mono output level.
Amplifier will clip at 70Vrms level.

2300

1. Connect signal from source to CH B input.

2. Stereo/Biamp switch not active-(Stereo/Mono switch
overrides this switch when in mono/70V/100V mode).

3. Move Stereo/Mono switch to MONO mode.

4. Set load switches (8Ω/4Ω/2Ω) to 1/2 the actual load
impedance. (16Ω/8Ω/4Ω) i.e. for a 4Ω speaker load,

select the 2Ω setting for both CH A and CH B Load
Switches

5. Connect appropriate speaker load 16Ω/8Ω/4Ω across
the red terminals of the 5-way binding posts.

6. CH B level control adjusts the mono output level.

(1200W-GX2600, 600W-GX2300)

BRIDGE MONO MODE (GX2300/GX2600)

70V MONO MODE (GX2300/GX2600)

70V
4Ω

100v

8Ω

2Ω

CH A

Load

Power

Crossover

CD EQ

Freq

Crossover

CD EQ

Freq

CH B

2300

–

180˚

HP –

Delay

LP –

0˚–

must

Full –

choose

Phase

2

6

+0

one
only

0”­6”-

+10 dB

Audio GND

12”-

500Hz –

Chassis

Float

18”-
24”-

800Hz –

30”-

ON

–

180˚

–

HP
LP –

0˚–

Full –

Phase

2

+0

6

Delay

0”-

+10 dB

6”-

must

12”-

500Hz –

choose

18”-

one

24”-

800Hz –

only

30”-

4Ω– 16Ω

ON

Mono,70V,100V

70V
4Ω

100v

8Ω

2Ω

CH A

IN

BIAMP STEREO

CH B

IN

(Mono)

-15

-12

-18

-21

-9

-24

-6

-27

GX2300

300 W Stereo, 2Ω– 8Ω
600W Mono, 70V,100V

250V T7A

-3

-32

-38

F

OF

0dB

70V

100V

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-3

8

OFF

0dB

A Division of
Rockford Corp.

®

Tempe, AZ 85281
Made in the U.S.A.

250W
115V~

50-60Hz

Channel A

protect

Channel b

For 70V, 100V, or Mono

• Use CH B input

• Load across RED terminals

• Set load switches to one

half load impedance

Attention: Utiliser un fusible

de rechange de même type.

CAUTION: For continued
protection from risk of fire,
replace only with same type
and rating of fuse.

Stereo Mono

thermal

al

sign

clip

—

300W

2Ω – 8Ω

+

—

+

+

—

300W

600W

2Ω – 8Ω

Class 2 wiring

70V

4Ω

100v

8Ω

2Ω

CH A

Load

Power

Crossover

CD EQ

Crossover

CD EQ

2300

CH B

100V 70V

180˚

–

HP –

Delay

LP –

0˚–

must

ON

ON

choose

one
only

Audio GND
Chassis

Delay

must

choose

one
only

Mono,70V,100V

—

300W

2Ω – 8Ω

Float

+

—

+

+

—

300W

600W

2Ω – 8Ω

4Ω– 16Ω

Class 2 wiring

Full –

Phase

2

6

+0

0”­6”-

+10 dB

12”-

500Hz –

18”-
24”-

800Hz –

30”-

180˚

–

HP

–

LP –

0˚–

Full –

Phase

2

+0

6

0”-

+10 dB

6”­12”-

500Hz –

18”-
24”-

800Hz –

30”-

70V

4Ω

100v

8Ω

2Ω

100V 70V

GX2300 GX2600

Freq

CH A

IN

BIAMP STEREO

Freq

CH B

IN

(Mono)

-15

-12

-18

-21

-9

-24

-6

-27

Channel A

prot

Channel b

For 70V, 100V, or Mono

• Use CH B input

• Load across RED terminals

• Set load switches to one

half load impedance

Attention: Utiliser un fusible

de rechange de même type.

CAUTION: For continued
protection from risk of fire,
replace only with same type
and rating of fuse.

ect

thermal

Stereo Mono

250V T7A

al

sign

clip

70V

100V

GX2300

300 W Stereo, 2Ω– 8Ω
600W Mono, 70V,100V

250W
115V~

50-60Hz

-3

-32

-38

OFF

0dB

-15

-12

-18

-21

-9

-24

-6

-27

-3

-32

-38

OFF

0dB

A Division of
Rockford Corp.

®

Tempe, AZ 85281
Made in the U.S.A.

Transformer

70 Volt

70 Volt

Transformer

etc.

Parallel Array

– 21 –

1. Connect signal from source to CH B input.

2. Stereo/Biamp switch not active (Stereo/Mono switch
overrides this switch when in mono/70V/100V mode).

3. Move Stereo/Mono switch to 100V mode.

4. Select 100V load, both channels.

5. Connect parallel array of 100V transformer-equipped
speakers across the red terminals of the 5-way binding
posts. (1200W – GX2600, 600W – GX2300)

6. CH B input sensitivity controls 100V mono output level.
Amplifier will clip at 100Vrms level.

1. Connect signal from source to both CH A and CH B inputs.

2. Move Stereo/Biamp switch to Stereo mode.

3. Move Stereo/Mono switch to Stereo mode.

4. Select 8Ω speaker load for each channel.

5. Connect parallel array of 70V transformer-equipped
speakers (up to 600W per channel) to 5-way binding
posts.

6. Adjust CH A and CH B level controls independently.

100V MONO MODE (GX2300/GX2600)

70V STEREO MODE (GX2600 ONLY)

GX

-

– 22 –

Hafler offers a limited warranty on Hafler products on the following terms:

•

Length of Warranty

5 years on GX2300 & GX2600

•

What is Covered

This warranty applies only to products sold to the original owner (non-transferable). This only applies to units sold in the
Continental United States. You are required to have a copy of the receipt stating the customer's name, dealer name, prod­uct purchased and date of purchase.

•

Products found to be defective during the warranty period will be repaired or replaced (with product deemed to be equiv­alent) at Hafler's discretion.

•

What is NOT Covered

1. Damage caused by accident, abuse, improper operations, water, theft

2. Service performed by anyone other than Hafler or an Authorized Hafler service center

3. Any product purchased outside the United States (please contact your local dealer)

4. Shipping charges to get the unit to Hafler

5. Any product which has had the serial number defaced, altered, or removed

• Limit on Implied Warranties

Any implied warranties including warranties of fitness for use and merchantability are limited in duration to the period of
the express warranty set forth above. Some states do not allow limitations on the length of an implied warranty, so this
limitation may not apply. No person is authorized to assume for Rockford Fosgate any other liability in connection with
the sale of the product.

• How to obtain service or technical support

Please call 1-800-669-9899 for Rockford/Hafler support. (you may also fax [phone]).You must obtain an RA #
(return authorization number) to return any products to Hafler. You are responsible for shipment of product to
Hafler.Always include Proof of Purchase. Mark RA#on outside of shipping carton.

Rockford Corporation
Hafler Division
(receiving amps)
2055 E. 5th Street
Tempe, Arizona 85281

Service Policy and Limited Warranty

– 23 –

PC BOARD LAYOUTS

X55

16

1

X18

JW9

JW12

R109

Q15

X24X1

X58

JW6A1

R99

R98

R110

R85

Q16

X40

R159

C82

R6

Q35

C86

R100

R86

Q32

R126

R125

CR21

C61

C62

R111

R87

Q17

BAR CODE

X20

C150

R212

C122

U7

CR50

R189

C87

R193

C91

R166

CR29

R150

R149

R160

Q43

R161
C77

R137

CR25

R136

CR22

R127

U4

CR23

C71

1/V

Q30

R114

I-N

AGND

R101

R88

R77

Q18

X52

FLOAT

CHASS

J6

C184

­BLK

X43

RED

X53

+

J2

C185

X46

SW2

R346

C125

R344

R350

X45X44

C124

C182

C133

U13

X51

JW4

CHBCHA

X47

C111

R238

R331

R329

R328

C155

C153

R327

U19

R207

R337

R341

R362

C152

R330

R363

CR72

R285

R224

CR60

R223

CR71

R225

Q68

R170

R151

R152

R139

Q33

R138

R128

R118

C65

C139

R222

HS1

U8

C105

Q69

R206
R205
R201

Q44

Q31

R312

R102

Q19

C102

Q63

C92

R203

Q61

Q50

R194

R313

R202

R179

R120

Q47

R142

CR26

R129

R25

R153

Q45

C78

C135

R115

R90

R89

C129

R78

Q20

I-N

C145

CR53

CR54

R249

C154

R245

Q76

C112

R250

R326

U9

R191

R237

R240

R239

R334

C107

R232

R231

Q72

Q73

C106

Q70

R230

Q100

R299

CR66

CR43

R226

R132

R310

R1

C132

R308

R292

C67

R216

R195

C136

R171

CR34

U16

R314

CR69

R79

CR35

CR30

Q51

R121

R135

R307

Q62

RED

X42

C68

C63

BLK

X50

X49 X36

R80

Q21

JW5

R347

S2

R348

R349

R345

C183

R298

R306

C151

OUT

R244

1/V

C146

U18

Q83

R229

R235

R247

R321

R233

CR46

CR47

R221

CR42

CR61

R332

R286

R335

C167

C99

Q64

Q65

Q57

R218

Q52

R302

R162

R217

TEST1

L2

R122

X41

X30

X66

R81

Q22

JW8

R293

R295

U14

1/V

R261

R258

C115

R257

R254

R251

C114

R234

I-P

R248

U10

C109

R242

C110

R241

R243

Q81

R227

R236

R359

Q71

R360

Q74

R228

R211

R361

Q58

C103

R333

C131

C104

CR44

C88

CR36

R190

C89

U6

CR31

R180

C81

C80

C73

C72

R103

R91

Q29

Q23

C97

C74

C96

SW3

STEREO

JW6A2

CR56

Q77

CR52

R246

Q75

R208

R209

R174

R173

Q36

R82

P1

R303

CX

BIAMP

P3

JW3

R278

C143

16

1

X48

R219

R210

C101

C94

CR37

R182

Q48

C85

R181

R183

Q37

R134

R154

R155

R133

C69

R116

R75

R104

Q24

R288

R301

R287

C130

C128
R297

C127

R294

U15

R283

R290

C123

C138

R400

CX

CX

R305

C126

R351

U17

C144

R304

R352

X21

R291

R213

R214

R215

Q67

C98

Q66

R204

Q53

R198

R196R192

R197

Q54

R184

Q46

Q49

R143

R141

R140

R117

R83

C95

R200

C93

R176

R199

C84

R167

CR32

R177

R175

R178

Q39

Q38

Q34

R123

R130

C70

C66

R105

C64

R113

R112

R76

R92

R84

Q25

HAFLER

3/8/00

PC-2459-E

C113

R320

R279

R319

C100

C140

R317

R106

Q26

M.ALBERS

PC-2459-E

U11

C108

R309

R282

CX

C142

R281

C141

R289

R5

R318

CR62

CR63

R315

C149

JW2

CR27

Q40

CR24

R107

R93

X72X71

A.NACE

CR73

R276

C159
R272

R271
R270

C41

CR58

CHB

R156

R157

C75

U5

1/V

R21

R277

C119

CHA

CHA > TOP

R144

R158

I-P

R94

Q27

X3

X54

R280

R354

R353

CR70

R273

C121

U12

C120

Q80

C118

R264

R266

R265

R267

R255

R259

R252

R253

Q78

C116

CHB > BOTTOM

CR38

Q60

R165

C90

R168

R185

R186

AGND

R163

CR28

R164

R148

R145

R147

C79

Q41

R124

R146

Q55

R131

C76

C134

R169

R119

R188

C174

R108

R187

R96

TS1

R95

X56

R172
R220

MONO

R274

R275

CR39

SW1

CR41

R268

Q79

R256

STEREO

R358

R260

CR48

CR45

CR33

Q56

X19

Q42

R300

CR55

C137

CR51

TS2

J20

R97

Q28

C161

C166

C165

C164

C163

C162

OUT

-15F

+15F

-15V

AGND

VFAN

C46

C53

A

A

CR13

K

K

K

CR14

A

A

A

C48

Q10

T1

A

A

R47

HS2

CR64

HIGH VOLTAGE

C20

R30

R28

R27

K

K

J3

U2

R10

C9

C6

X4

C7

X25

X17

X13

X9

R269

R263

C117

R262

A

A

K

K

C52

CR57

C47

K

C56

A

A

C54

K

CR15

K

A

CR16

K

K

C50

R54

C38

C24

R51

R52

CR67

R343

S1

X16

X14

X59

X10

X7

R59

C180

BLACK

R55

C10

C156

CR18

J9

RED

ORG

J10

R56

J11

KS4R

C31

X57

C181

C148

X2

Q12

Q11

R60

R63

R62

C57

R61

C43

A

CR5

A

K

J8

C11

K

A

A

X5

C83

C42

C147

Q13

R64

R67

R71

R68

R65

R66

R69

C59

C58

T4

CR7

CR9

T3

K

CR6

CR8

R43

C29

K

A

CR4

A

A

J4

A
K

CR40

R53

K

K

K

CR59

C25

J7

C34

U3

R32

C33

A

A

R35

R31

C22

CR68

R33

C21

R34

R22

K

K

R26

R23

J5

CR49

J18

C14

C13

R12

J19

R296

DANGER - HIGH VOLTAGE

J12

C2

C3

C168

C169

U1

X15

X38
X31
X26
X29
X39
X27

X34 X23X22

X32X33X37 X35

X28

X64X63 X62 X61 X60
X70X69X68X67

X65

X11

Q14

R70

R72

R73

C35

R50

R41

R48

R17

R42

R37

R36

Q2

C23

C15

R24

J1

R284

R11

Q4

Q3

R13

X12

JW11

X8

C60

R74

R45

R44

Q8

Q7

R38

R39

R40

R14

R15

R16

Q1

R3

R4

C176

T2

C27

C17

C178C177

CR20

R336

R324

R29

R325

C39

C40

C37

X6

C179

CR19

R342R340

R339R338

L1

C26

C16

C36

C170

CR1

JW1

CT -RAIL+RAIL

Q6

R18

C160

C158

C157

CT

+15V

+15PWM

C51

R58

C55

K

K

CR17

C45

CR12

A

A

R57

K

K

C44

CR11

A

A

C49

K

K

CR10

A

A

A

A

C30

K

K

CR3

C28

R49

C32

A

A

CR2

J14

CR65

J17

J16

R19

C19

K

K

KAA

R46

K

C18

C12

J15

R20

C1

Z1

R316

R9

C4

R2

R7

R8

C5

DANGER - HIGH VOLTAGE

– 24 –

EMI FILTER

CROSSOVER CD EQ

PC BOARD LAYOUTS

HAFLER

J2

C2

L1

J3

L3

J4

C6

PC-2460-E

KS4R

DANGER - HIGH VOLTAGE

J9

BLACKBLACK

J6

J13

C3

L2

C1 C4

J10

ORGORG

J11
WHT

J12

WHT

120V

J14

230V

J16

120V

J5

J7

C5

C7

J1

R2

R1

R3

230V

J8 J15

R4

– 25 –

PC BOARD LAYOUTS

TIME DELAY/PHASE INVERTER

– 26 –

BRIDGE RECTIFIER

Schematic Diagrams

– 27 –

EMI FILTER

PC-2460-e.sch-1

– 28 –

CROSSOVER CD EQ

Schematic Diagrams

– 29 –

TIME DELAY/PHASE INVERTER

– 30 –

AMPLIFIER

– 31 –

C600_maualB.sch-1

– 32 –

PROTECTION

– 33 –

C600_maualB.sch-2

G

– 34 –

HIGH VOLTAGE CONTROL

– 35 –

GX 2300

– 36 –

HOUSEKEEPING CONTROL

– 37 –

C600_maualB.sch-6

– 38 –

INPUT

– 39 –

C600_maualB.sch-8

– 40 –

POWER

– 41 –

C600_maualB.sch-5

A DIVISION OF ROCKFORD CORPORATION

546 SOUTH ROCKFORD DRIVE

TEMPE, ARIZONA 85281 U.S.A.

IN U.S.A. [phone] / IN CANADA, [phone]

IN EUROPE, FAX [phone] / IN JAPAN, FAX [phone]

MAN-2987-A
6/00 MJT

®