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PUNCH 4020 DSM
4-CHANNEL AMPLIFIER
INSTALLATION & OPERATION
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Dear Customer, Congratulations on your purchase of the world's finest brand of car audio amplifiers. At Rockford Fosgate we are committed to musical reproduction at its best, and we are pleased you chose our product. Through years of engineering expertise, hand craftsmanship and critical testing procedures, we have created a wide range of products that reproduce music with all the clarity and richness you deserve. For maximum performance we recommend you have your new Rockford Fosgate product i
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TABLE OF CONTENTS Introduction ...................................................................................... 1 Punch 4020 Amplifier Accessory Pack .............................................. 1 Rockford Fosgate Accessories............................................................ 2 Technical Design Features ................................................................ 3 Punch 4020 Design Features ............................................................. 6 Installation Conside
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INTRODUCTION The Punch 4020 is a 4-channel amplifier which offers 20 Watts per channel when driven into 4 Ohms. The amplifier utilizes a 2/ 4 input selector switch and XCard crossovers. When building a 4-channel amplifier, a major design challenge is to maintain sound quality in a limited space. For the Punch 4020, Rockford Fosgate Engineers designed the Trans•Ana to- pology which is a fast, short loop circuit allowing the output stage to be driven with a low voltage drive signal. With the addit
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ROCKFORD FOSGATE ACCESSORIES The following accessories were designed to enhance the perfor- mance of the Punch 4020 amplifier. Energy Storage Capacitor (PCH-C1) The Punch 1 farad capacitor is used to provide extra current needed by amplifiers to reproduce musical transients. The Punch Cap also has the natural ability to filter DC ripple caused by the alternator which can result in noise in the system. The PCH-C1 will maximize both the sound quality and performance that Rockford Fosgate amplifi
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TECHNICAL DESIGN FEATURES trans•ana The trans•ana (TRANS conductance Advanced Non-multiplying Amplifier) is a novel circuit that utilizes a short-loop complemen- tary topology and advanced Real Time Protection circuitry. THE RESULT: An amplifier design with the benefits of tube and bi- polar transistor amplifier design without the limitations of either. MOSFET Devices Rockford Fosgate is one of the few manufacturers in any of the sound communities to utilize MOSFET devices in both the power
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to be obtained in amplifiers of desirable package size without resorting to “amplifier-on-a-chip” shortcuts. These advantages are shown below in Figure 1. THE RESULT: Less connections, improved reliability, shorter signal paths, superior signal-to-noise ratio and awesome sonic performance. Component Figure 1 Solder Solder Thru-Hole Surface Mount TOPAZ (Tracking Operation Pre-Amplifier Zone) The TOPAZ (Tracking Operation Pre-Amplifier Zone) circuitry solves ground loop noise problems common to
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XCard (Internal Crossover) The Punch 4020 amplifier utilizes internal active crossovers. These crossovers have many performance advantages such as using dis- crete components for exact frequency adjustments which are far superior to potentiometers. Additionally, the XCard can be config- ured for high-pass, low-pass and full range operation. With slight modification, many crossover frequencies and slope configurations can be achieved. THE RESULT: Increased system design flexibility with a prec
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PUNCH 4020 DESIGN FEATURES 1. Cast Aluminum Heatsink – The cast aluminum heatsink of the Punch amplifier dissipates heat generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over conventional extrusion heatsink designs. 2. End Caps – Interchangeable end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look. 3 8 6 8 3 6 R R + L – + R – – L + – R + L L (Bridged Mono) (Bridged Mono) Front Speakers Rear Rear
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6. RCA Input Jacks – The industry standard RCA jack provides an easy connection for signal level input. They are gold-plated to resist the signal degradation caused by corrosion. 7. Signal Input Switch – This switch allows selection of 2 channel or 4 channel source unit feed. 8. Input Sensitivity Controls – The input level controls are preset for 500mV which will match the output of most source units. They can be adjusted to match input levels ranging from 150mV to 3V. 9. Internal Crosso
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INSTALLATION CONSIDERATIONS The following is a list of tools you will need for installing the Punch amplifier: Allen wrenches 7/64" & 3/32" (included) Voltmeter Wire strippers Battery post wrench Electric hand drill w/assorted bits Wire cutters Wire crimpers Assorted connectors This section focuses on some of the vehicle considerations for installing your new Punch amplifier. Checking your battery and present sound system, as well as pre-planning your system layout and best wiring routes will s
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MOUNTING LOCATION The mounting location and position of your amplifier will have a great effect on its ability to dissipate the heat generated under normal operation. The design of our cast aluminum heatsink serves to easily dissipate the heat generated over a wide range of operating condi- tions. However, to maximize the performance of your amplifier, care should be taken to ensure adequate ventilation. Trunk Mounting Mounting the amplifier vertically on a surface with the fin grooves running u
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BATTERY AND CHARGING Amplifiers will put an increased load on the vehicle's battery and charging system. We recommend checking your alternator and battery condition to ensure that the electrical system has enough capacity to handle the increased load of your stereo system. Stock electrical systems which are in good condition should be able to handle the extra load of any Rockford amplifier without problems, although battery and alternator life can be reduced slightly. To maximize the performance
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3. Prepare a length of cable to be used for the ground connection. Strip 5/8" of insulation from the end of the cable as described above and connect to the appropriate terminal of the ampli- fier. Prepare the chassis ground by scraping any paint from the metal surface and thoroughly clean the area of all dirt and grease. Strip the other end of the wire and attach a ring connector. Fasten the cable to the chassis using a screw. 4. Prepare the REM turn-on wire for connection to the amplifier by st
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USING THE XCARD The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range operation. These cards are shipped in the most common fre- quency. Each crossover card has two faces: one face operates Full Range, the other has arrows to indicate the edge for selecting HP (high-pass) or LP (low-pass) operation. Orient the card with the desired operating edge, indicated by the arrow, toward the socket terminals inside the amplifier. Firmly, bu
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4020 POWER CONNECTIONS 4 5 10 POWER REM B+ GND Connect to remote turn-on lead of source unit. Connect to chassis ground of vehicle* Less than 18" Connect to B+ of battery with a 30 amp fuse. *Keep grounds as short as possible. – 13 –
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SAMPLE WIRING DIAGRAMS 4-CHANNEL STEREO Front Rear R R + L – + R – – L + – R + L L (Bridged Mono) (Bridged Mono) Front Speakers Front Rear Rear Speakers + – + – 2Ω Minimum High Frequency 2Ω Minimum Low Frequency Rear XCard* Front XCard* HP LP XCard 1 XCard 2 *Note: XCard can be inserted in HP, LP, or Full Range. • Signal input switch to 4 channel input. • Gain for Front and Rear operate independently. • Front is operating in stereo. • Rear is operating in stereo. • Experiment with subwoofer pola
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4-CHANNEL – STEREO FRONT MONO REAR Front Rear R R + L – + R – – L + – R + L L (Bridged Mono) (Bridged Mono) Front Speakers Rear Rear Speakers Front + – + – 4Ω Minimum 2Ω Minimum Low Frequency High Frequency Rear XCard* Front XCard* LP HP XCard 1 XCard 2 *Note: XCard can be inserted in HP, LP, or Full Range. • Signal input switch to 4 channel input. • Gain for Front and Rear operate independently. • Front is operating in stereo. • Rear is operating in stereo. • Fader on source unit controls level
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2-CHANNEL – MONO Front Rear R R + L – + R – – L + – R + L L (Bridged Mono) (Bridged Mono) Front Speakers Front Rear Rear Speakers + – – + 4Ω Minimum 4Ω Minimum Low Frequency Low Frequency Rear XCard* Front XCard* LP LP XCard 1 XCard 2 *Note: XCard can be inserted in HP, LP, or Full Range. • Signal input switch to 2 channel input. • Gain for Front and Rear operate independently. • Front is operating in mono. • Rear is operating in mono. – 16 – Front Gain Rear Gain
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4-CHANNEL – STEREO/MONO FRONT STEREO REAR Rear Front R R + L – + R – – L + – R + L L (Bridged Mono) (Bridged Mono) Front Speakers Front Rear Rear Speakers + – + – 2Ω Minimum 2Ω Minimum High Frequency High Frequency – + + – 2Ω Minimum High Frequency 4Ω Minimum Rear XCard* Front XCard* Low Frequency HP Full Range XCard 1 XCard 2 Note: XCard can be inserted in HP, LP, or Full Range. • Signal input switch to 4 channel input. • Gain for Front and Rear operate independently. • Front is operating in st
