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N O T I C E   -   I M P O R T A N T   S A F E T Y   I N F O R M A T I O N

C A U T I O N

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

!

WARNING:  TO PREVENT FIRE OR 

SHOCK HAZARD, DO NOT EXPOSE THIS 

EQUIPMENT TO RAIN OR MOISTURE.

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 tempera-
ture, 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.  Do not mount on a carpeted shelf or in a
sealed enclosure.  Allow for proper clearance above the equip-
ment.

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 equip-

ment.  Furthermore, extension cords or power strips must provide
the same three wire grounded connection.  It is important that the
blades of the equipment’s 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 adaptor 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 operat-
ing 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 person-
nel when:

A. The power supply cord or plug has been damaged, or

B. Objects have fallen, 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.

 – i –

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 magni-
tude 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 (servic-
ing) instructions in the literature accompanying the appliance.

Summary of Contents for 9303

Page 1: ... MADE USA IN THE PROFESSIONAL POWER AMPLIFIER 9303 9505 Installation Operation PROFESSIONAL POWER AMPL nova trans ...

Page 2: ...the required total current for safe operation of all connected equip ment Furthermore extensioncordsorpowerstripsmustprovide the same three wire grounded connection It is important that the blades of the equipment s plug be able to fully insert into the matingreceptacle Neverremovetheroundgroundingpinonthe plug in an attempt to mate to a two wire ungrounded receptacle use a grounding adaptor with ...

Page 3: ... 06Vrms for 225W into 4Ω Dimensions 19 W x 12 1 2 D x 3 1 2 H excluding feet Weight 36 lbs 16 4kg Power Consumption Quiescent 84 VA at rated power 612 VA 150W into 8Ω both channels driven 9505 Power Rating 250 wpc 8 Ω 375 wpc 4Ω 750 Watts mono 8Ω Distortion 0 1 THD 20 20Hz Typically 0 005 THD 1kHz at rated power into 8Ω Damping Factor 1000 to 1kHz 100 to 20kHz 20 to 100kHz into 8Ω Input Sensitivit...

Page 4: ... Balanced Input 2 Output Connections 2 Monophonic Use 2 OPERATION Power Switch 3 Balanced Unbalanced Input Switch 3 Ground Switch 3 Mono Switch 3 Load Fault Protection 3 Warm Up 3 Cleaning and Maintenance 3 Schematic Diagram 4 PC Board Layout 6 Parts List 7 9303 9505 Functional Block Diagram 8 TECHNICAL INFORMATION Theory and Operation of trans nova 9 Circuit Implementation 9 Calibration 10 Common...

Page 5: ...spaced on 3 4 centers for use with dual banana plugs For high power applications the amplifier can run in bridged mono for double the output voltage Using state of the art surface mount assembly equipment in our manufacturing facility ensures consistency and reliability LOCATION The 9303 and 9505 can produce considerable heat in normal operation so the primary consideration when determining a loca...

Page 6: ...ble length it will drive Make sure the BALANCED UNBALANCED switch is set for UNBALANCED operation Unbalanced Source with Balanced Input Better noise rejection for long cable runs can be achieved by using a twisted pair balanced cable from the unbalanced source At the source end of the cable connect an RCA plug with the return wire and shield connected to the ground shell of the plug Wire the plug ...

Page 7: ...witch is determined by the overall noise in the system choose the position which gives the lowest hum MONO SWITCH Conventional two channel stereo operation is obtained with the STEREO MONO switch in the STEREO position For high powered single channel use set the switch to MONO and use the left channel input and the RED binding posts only for the output For thermal considerations we do not recommen...

Page 8: ...ors in microfarads 3 Component Designators 1 99 Left Channel 101 199 Right Channel 201 299 Common Parts 301 399 Chassis Power Supply 4 Left Channel Only Shown 5 Stereo Mono Switch Shown in Stereo 6 Balanced Unbalanced Switch Shown in Balanced Position 7 Chassis Float Ground Switch Shown in Float Position ...

Page 9: ... 5 ...

Page 10: ... 6 PC BO A R D LA Y O U T ...

Page 11: ...IN OHMS R1 R101 47 5k 1 4W 1 RM 4 4752C R2 R102 47 5k 1 4W 1 RM 4 4752C R3 R103 1k 1 4W 5 RM 4 102C R4 R104 1k 1 4W 5 RM 4 102C R5 R105 2 2M 1 4W 5 RM 4 225C R6 R106 100 1 4W 5 RM 4 101C R7 R107 22k 1 4W 5 RM 4 223C R8 R108 100 1 4W 5 RM 4 101C R9 R109 100 1 4W 5 RM 4 101C R10 R110 332 1 4W 1 RM 4 3320C R11 R111 100 1 4W 5 RM 4 101C R12 R112 332 1 4W 1 RM 4 3320C R13 R113 22 1 1 4W 1 RM 4 0221C R1...

Page 12: ...0 F201 15A Slo Blo FS 015SB F203 F204 2 5A Fast Mini FS 0390 9303 Differences IEC Line Cord FAH 146 C19 C119 15000µf 75V CER 159ES C20 C120 15000µf 75V CER 159ES F201 10A Slo Blo FS 010SM Not Used Q47 Q147 2SK 1058 Q50 Q150 2SJ 162 DESIGNATOR VALUE PART BR201 Bridge Rectifier SS 222 BR301 Bridge Rectifier SSH 609 BR 302 Bridge Rectifier SSH 609 IEC Connector CC 0918 IEC Line Cord FA 0209 Dual Bind...

Page 13: ... measured specifications are very good the numbers do not describe the realistic sound of the amplifiers CIRCUIT IMPLEMENTATION 9 Earlier models of amplifiers we have offered using the trans nova topology have earned the reputation for clean natural sounding reproduction A conservative purist design approach was used to avoid compromising the desirable characteristics of the trans nova circuits Ci...

Page 14: ...amplifier design The power supply utilizes a UI style transformer with a separate primary for each channel The transformer has a separate secondary for each channel high voltage power supply each feeding a conventional split full wave bridge rectifier High voltage power supply capacitance is 20 000µF per rail for each channel for the 9505 and 5 000 for the 9303 The third transformer secondary feed...

Page 15: ...n years from the date of purchase including parts labor and return shipping costs within the Continental United States Alaska and Hawaii This warranty applies only to products sold in the United States Of America For warranties outside the U S A please contact your local agent It is the owner s responsibility to pay shipping preferably United Parcel Service UPS to the factory collect shipments wil...

Page 16: ...MAN 0587 D 4 95 HAFLER PROFESSIONAL A DIVISION OF ROCKFORD CORPROATION 546 SOUTH ROCKFORD DRIVE TEMPE ARIZONA 85281 U S A IN U S A 602 967 3565 IN EUROPE FAX 49 4207 801250 IN JAPAN FAX 81 559 79 01265 ...

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