Hafler 9303, 9505 manual 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

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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.

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.

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

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 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-

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.

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Contents Trans 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 R F O R M a N C E Specification S Installation B L E O F C O N T E N T SInstallation T R O D U C T I O NBalanced Input 1/4 Tip Ring Sleeve Power Switch E R a T I O NH E M a T I C D I a G R a M Page B O a R D L a Y O U T R T S L I S T 9303 / 9505 Functional Block Diagram C H N I C a L R E F E R E N C E Theory and Operation of transnovaCommon Mode Rejection R V I C E P O L I C Y a N D L I M I T E D W a R R a N T Y EUROPE, FAX 49 4207-801250 in JAPAN, FAX 81 MAN-0587-D 4/95

9505, 9303 specifications

The Hafler 9303 and 9505 are both high-performance power amplifiers that have garnered a solid reputation among audiophiles and professionals in the audio industry. These amplifiers are designed to deliver high-quality sound reproduction with performance and reliability, making them suitable for various audio applications, from home theater systems to professional studio work.

The Hafler 9303 is a versatile amplifier known for its warm sound and consistent performance. With a power output of 100 watts per channel at 8 ohms and 150 watts at 4 ohms, it provides ample headroom for dynamic peaks in music without distortion. The 9303 features a classic, rugged design and is equipped with an exceptional thermal management system to prevent overheating during extended use. Its circuitry incorporates advanced feedback technology that minimizes distortion and enhances audio clarity. The amplifier also supports both balanced and unbalanced inputs, allowing for flexible integration into various audio systems.

On the other hand, the Hafler 9505 takes the performance up a notch with a powerful 200 watts per channel at 8 ohms, and it can reach 300 watts at 4 ohms. This model is ideal for driving larger speakers and can handle demanding audio setups. The 9505 incorporates Hafler's proprietary active feedback design, which maximizes damping factor and ensures accurate transient response. Its robust construction and high-quality components provide longevity and reliability, making it a favorite among professionals who require consistent performance in demanding environments.

Both amplifiers feature dual-mono construction, ensuring independent power supply for each channel, which helps in maintaining channel separation and reducing crosstalk. This design contributes to a wider soundstage and clearer audio reproduction, crucial for critical listening and professional applications. Furthermore, the amplifiers are equipped with comprehensive protection circuitry, safeguarding the components against speaker short circuits and thermal overloads.

In summary, the Hafler 9303 and 9505 power amplifiers represent an excellent choice for anyone seeking reliable and high-fidelity audio performance. With their impressive power outputs, advanced technologies, and robust designs, these amplifiers are versatile enough to cater to both home audio enthusiasts and professional sound engineers, ensuring that they deliver exceptional sonic experiences across various settings.