P7000 Installation & Operation ® ® ran t va no s U D AS ESIG SEM NE BLE D A D I ND NT HE SA PROFESSIONAL POWER AMPLIFIER AMPL NOTICE - IMPORTANT SAFETY INFORMATION CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ! ! 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. 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 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, 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. 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. RETAIN OWNER'S MANUAL These safety and operating instructions should be retained for future reference. HEED WARNINGS All warnings on the equipment and in the operating instructions are important and should be followed. FOLLOW INSTRUCTIONS All operating and use instructions are important and should be followed. HEAT The equipment should be kept away from areas of high temperature, i.e., heater vents, radiators, stoves/ovens, fireplaces, etc. 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. 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. 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. 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. 2. 3. 4. 5. 6. 7. 8. 9. 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 ­i­ PERFORMANCE SPECIFICATIONS P7000 Power Rating: FTC (20Hz-20kHz, <0.1% THD) 350 wpc into 8 500 wpc into 4* 1000 wpc into 8* EIA (1kHz, 0.1% THD) 375 wpc into 8 525 wpc into 4* 1050 wpc into 8* *Continuous sine wave power limited by current rating of line fuse. Signal-to-Noise: 100dB below rated output from 20Hz to 20kHz Frequency Response: ±0.1dB, 20Hz to 20kHz +0/­3dB, 0.2Hz to 100kHz Slew Rate: Input Impedance: 100 V/µs 47,000 per phase Input Sensitivity Range for rated output power: Unbalanced: 1.7V-9.5V RMS (8), 1.4V-8V RMS (4) Balanced: Gain: CMRR: Damping Factor: 0.85V-4.75 RMS (8), 0.7V-4V RMS (4) +15dB min. / +30 max. ­75dB at 1kHz 600 (to 1kHz); 200 (to 10kHz); 25 (to 100kHz) Power Consumption: 275 VA quiescent. 1440 VA with both channels driven at 350 watts at 8, 1800 VA maximum. Controls & Switches: Front Panel: Power switch, Normal/Bridged mode switch, level controls Rear Panel: Chassis/Float ground switch, Stereo/Bi-amp selector switch Crossover: Indicators: Connectors: Variable high-pass, low-pass and bandpass; 100Hz as supplied Power lamp, Clip, Short, Thermal, Signal LEDs Input: 2-way XLR and 1/4" Tip Ring Sleeve Output: 5-way binding posts spaced for dual banana plugs Power: IEC 320 Dimensions: 19"W x 127/8"D x 3 1/2"H plus 11/8" for handles, includes rear supports (48.3cm x 32.7cm x 8.3cm plus 2.875cm for handles, includes rear supports) Net Weight: 40 lbs. (18.18kg) ­ ii ­ TABLE OF CONTENTS SAFETY PRECAUTIONS ........................................................................................................................................... i PERFORMANCE SPECIFICATIONS ......................................................................................................................... ii INTRODUCTION ................................................................................................................................................... 1 INSTALLATION Location ........................................................................................................................................................... AC Line ............................................................................................................................................................ Input ................................................................................................................................................................. Input Crossover ................................................................................................................................................ Input Mode Switches ........................................................................................................................................ Output Connections ......................................................................................................................................... OPERATION Power Switch ................................................................................................................................................... Level Controls .................................................................................................................................................. XCard Crossovers ............................................................................................................................................. Ground Switch ................................................................................................................................................. Short Circuit Protection .................................................................................................................................... LED Indicators .................................................................................................................................................. Warm Up ......................................................................................................................................................... Cleaning and Maintenance ............................................................................................................................... 2 2 2 3 3 3 4 4 4 5 5 5 5 5 TECHNICAL REFERENCE Field Service Considerations ............................................................................................................................. 6 Theory and Operation of trans·nova ................................................................................................................ 6 PC Board Layout ............................................................................................................................................... 7 Schematic Diagram .......................................................................................................................................... 8 Parts List ......................................................................................................................................................... 10 P7000 Functional Block Diagram ................................................................................................................... 12 Circuit Operation ........................................................................................................................................... 13 Amplifier Module Replacement ...................................................................................................................... 16 Building Custom XCards ................................................................................................................................. 17 Resistor Chart ................................................................................................................................................. 18 WARRANTY ......................................................................................................................................................... 19 INTRODUCTION The Hafler P7000 is a two channel professional power amplifier suitable for use in any sound reinforcement situation where faithful, accurate reproduction is required. The amplifier uses forced air fan cooling to deliver high power output in a compact size. Status indicators on the front panel give a visual representation of amplifier and system operation. Input configuration switching and active crossovers enhance the flexibility when used in multiple amp systems, without requiring the use of additional equipment. The use of our patented trans·nova circuit topology and MOSFET output stage ensures reliable, long term operation which is backed by our five year warranty. This manual contains information on using the P7000 amplifiers. It is organized into three main sections. "Installation" covers the location and connection of the amplifier in the system. Like many precision components, careful attention to the initial setup can yield dividends in higher performance and trouble-free use. "Operation" covers the controls and features of the amplifiers and how to use them to get the best effect. The "Technical Reference" section contains field service information; in addition to the schematic and parts list there are block diagrams and circuit operation explanations useful for technicians. We strongly urge reading over the Installation and Operation portions of this manual before putting the amplifier into service. The circuitry used in the Hafler Professional power amplifiers is our trans·nova (TRANSconductance NOdal Voltage Amplifier, US Patent 4,467,288) circuit. The P7000 also utilizes our proprietary DIABLO (Dynamically Invariant AB Linear Operation, patent application in progress) transconductance driver stage which combines the linearity of Class A operation with the current headroom of a Class B system. When combined with the robust output stage used in the P7000, DIABLO yields lower high frequency distortion without the sonic penalties associated with increasing the negative feedback. We have been using MOSFETs in our power amplifiers since the 1970s. During this time, they proved to be extremely fault tolerant, even in abusive situations. This ruggedness enables the amplifier to drive reactive speaker loads without the performance and sound penalties imposed by elaborate Safe Operating Area protection schemes. Active crossovers are incorporated at the input of the amplifier. These crossovers are controlled through the use of our XCard plug-in modules. Each XCard can operate as a full-range, high-pass ...