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50.1
power
® ®
50.2
car audio
for
power
competition Power amplifiers
Operation & Installation
new
chrome
heatsink
®
fanatics
punch
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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 fanatics about 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
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TABLE OF CONTENTS Introduction ................................................................................................................................................................1 Punch Accessory Pack ................................................................................................................................................. 1 Technical Design Features.................................................................................................................
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Rockford Fosgate is distinguished as the global leader in building high performance amplifiers. Since the introduction of the 2 250m and 250m, new performance standards were set for sound quality and flexibility and have risen to an even higher level with the introduction of the 50.2 and 50.1 “competition” amplifiers. The “50 series” utilize similar technologies of their predecessors like trans•nova, TOPAZ and DIAMOND; however, they have enhanced power supplies for driving very low impedances. T
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TECHNICAL DESIGN FEATURES Many of the solutions to common design problems encountered by Rockford Fosgate engineers created entire new circuit designs as well as new ways to construct the Punch 50.2 and 50.1 Power Amplifiers. In our flagship amplifiers, no expense was spared in design and construction from the unique circuitry design to the manufacturing process that has proven to be the industry reference for many years. Described below are just some of the accomplishments achieved by our engin
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u DSM (Discrete Surface Mount Technology) The DSM (Discrete Surface Mount) manufacturing process combines the advantages of both discrete components and integrated circuitry. Rockford Fosgate is the only American amplifier manufacturer to have invested millions into this process. DSM components differ from conventional discrete components in different ways. They are more compact, more rugged, and they efficiently dissipate generated heat. Using them wherever appropriate allows the advantages ass
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u Balanced Line Inputs (50.2) Using the Balanced Line Inputs provides the last word in achiev- Figure 2 RCA Input Differential Input Center able rejection of noise induced in the cable between the source Conductor and the amplifier. The differential input circuitry (Figure 2) used in the balanced input system rejects whatever signals are Outer Shield common to both of the shielded, twisted-pair conductors. Bal- anced line is universal in concert installations where the stage Differential inputs
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50.2 DESIGN FEATURES 1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power 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 – The unique end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look. 3 13 8 6 7 12 3 Unbal. L (Mono) R Speaker 0°-180° Bal. EZ - 180° - 0° Speaker + L – Bal. B
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LP HP 10. Input Sensitivity Controls – The input level controls are preset to match the output of most source units. They can be adjusted to match output levels from a variety of source units. 11. Internal Crossovers – These built-in crossover cards are configurable for a multitude of operating frequencies. The orientation of the card in its socket determines its function of high-pass, low-pass or full range operation. 12. E-Z Bridge Switch / 0°-180° Phase Switch – This dual purpose switch enabl
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50.1 DESIGN FEATURES 1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power 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 – The unique end caps conceal the wiring and input cables, giving the amplifier a clean “stealth” look. 12 11 6 9 13 7 L (Mono) R Power X-Over 0°-180° Speaker Gain 24dB/12dB/0dB + L – L + R / L
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LP HP 10. Internal Crossover – This built-in crossover card is configurable for a multitude of operating frequencies. The orientation of the card in its socket determines the function of high-pass, low-pass or full range operation. 11. Phase Switch – This switch enables you to easily invert the phase without having to disconnect the speaker wires. 12. Crossover Switch – This multi-function switch enables you to select a 12dB per octave slope or 24dB per octave slope for the internal crossover. W
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INSTALLATION CONSIDERATIONS Tools Needed The following is a list of tools you will need for installing the “50 Series” Power amplifiers: Allen wrenches 9/64" & 3/32" (included) Wire Cutters Wire strippers Voltmeter Battery post wrench Wire crimpers Electric hand drill and assorted bits 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 an
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MOUNTING LOCATION S 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 conditions. 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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> > > WIRING THE SYSTEM CAUTION: Avoid running power wires near the low level input cables, antenna, power leads, sensitive equipment or harnesses. The power wires carry substantial current and could induce noise into the audio system. 1. Configure the internal XCard crossovers prior to installation. Refer to the “Using the Signal Switching Network” (page 19 for the 50.2 and page 31 for 50.1) for further information. 2. Plan the wire routing. Take care when running signal level RCA cables t
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11. After the final inspection is complete, install the power fuse and enjoy listening. During the initial listening period, you may need to “fine tune” any phasing and level settings within your particular vehicle. To aid in this procedure, play a track with high musical content and cruise around your neighborhood. After fully evaluating the transient response of your system and making any final adjustments, all your neighbors within a 1 mile radius will assume that you have just successfully c
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a O d p e v r a TABLE OF CROSSOVER COMPONENT VALUES a n t c i e o d n L C 6dB/Octave Low-Pass 6dB/Octave High-Pass Freq. Speaker Impedance Hertz 2 OHMS 4 OHMS 8 OHMS C L C L L C 80 4.1mH 1000μF 8.2mH 500μF 16mH 250μF 100 3.1mH 800μF 6.2mH 400μF 12mH 200μF 130 2.4mH 600μF 4.7mH 300μF 10mH 150μF 200 1.6mH 400μF 3.3mH 200μF 6.8mH 100μF 260 1.2mH 300μF 2.4mH 150μF 4.7mH 75μF 400 .8mH 200μF 1.6mH 100μF 3.3mH 50μF 600 .5mH 136μF 1.0mH 68μF 2.0mH 33μF 800 .41mH 100μF .82mH 50μF 1.6mH 26μF 1000 .31mH 78
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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. The XCard shipped with your amplifier is set for Full Range. 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. Firml
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a O p d e v r a a XCARD RESISTOR CHART n t c i e o d n Our tests have shown that using 0.047mf capacitors for frequencies below 100Hz, and 0.022mf capacitors for frequencies above 100Hz, result in more linear crossover control. Refer to the Specifications page to determine the capacitor value of each supplied XCard. Butterworth Alignment Q = .707 Butterworth Alignment Q = .707 1% resistors used with 0.022mF capacitors 1% resistors used with 0.047mF capacitors Frequency R1 R2 Frequency R1 R2 20
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® ® I N S T 50.2 INSTALLATION A L L A T I O N 50.2 Power Connections (Option #1) Power REM Dual B+ Dual 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 40 amp fuse. *Keep wire as short as possible. 50.2 Power Connections (Option #2) Power REM Dual B+ Dual GND Connect to remote turn-on lead of source unit. Connect to chassis ground of vehicle* Less than 18" Optional energy storage capacitor + – Connect
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® ® I N S T RCA A L Stereo Operation L Input A T I O N Unbal. L (Mono) R EZ-180°-0° Speaker 0°-180° Speaker Bal. Bal. + L – – R + Bridged Pass Input Thru L R Gain Gain – – 1Ω Min. 1Ω Min. + + • RCA inputs are connected to both left and right channels • Signal Input Switch selected to Unbalanced for RCA input • Left Phase Switch set to 0° • Right Phase Switch set to 0° • Gain for left and right channels operate independently • Impedance for each channel should be 1Ω minimum • XCard can be
