INSTALLATION

WIRING THE SYSTEM

CAUTION:If you do not feel comfortable with wiring your new unit, please see your local Authorized Rockford Fosgate Dealer for installation.

CAUTION:Before installation, disconnect the battery negative (-) terminal to prevent damage to the unit, fire and/or possible injury.

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.Plan the wire routing. Keep RCA cables close together but isolated from the amplifier's power cables and any high power auto accessories, especially electric motors.This is done to prevent coupling the noise from radiated electrical fields into the audio signal.When feeding the wires through the firewall or any metal barrier, protect them with plastic or rubber grommets to prevent short circuits. Leave the wires long at this point to adjust for a precise fit at a later time.

2.Prepare the RED wire (power cable) for attachment to the amplifier by stripping 5/8" of insulation from the end of the wire. Insert the bared wire into the B+ terminal and tighten the set screw to secure the cable in place.

NOTE:The B+ cable MUST be fused 18" or less from the vehicle's battery. Install the fuseholder under the hood and ensure connections are water tight.

3.Trim the RED wire (power cable) within 18" of the battery and splice in a inline fuse holder. See Specifications for the rating of the fuse to be used. DO NOT install the fuse at this time.

4.Strip 1/2" from the battery end of the power cable and

crimp a large ring terminal to the cable. Use the ring terminal

to connect to the battery positive terminal.

5. Prepare the BLACK wire (Ground cable) for attachment to the amplifier by stripping 5/8" of insulation from the end of the wire. Insert the bare wire into the GND terminal and tighten the set screw to secure the cable in place. 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 non-anodized screw and a star washer.

NOTE:Keep the length of the BLACK wire (Ground) as short as possible. Always less than 30"(76.2cm).

6.Prepare the REM turn-on wire for for attachment to the amplifier by stripping 5/8" of insulation from the end of the wire. Insert the bared wire into the REM terminal and tighten the set screw to secure the wire in place. Connect the other end of the REM wire to a switched 12 volt positive source.The switched voltage is usually taken from the source unit's remote amp on lead. If the source unit does not have this output available, the recommended solution is to wire a mechanical switch in line with a 12 volt source to activate the amplifier.

7.Securely mount the amplifier to the vehicle or amp rack. Be careful not to mount the amplifier on cardboard or plastic panels. Doing so may enable the screws to pull out from the panel due to road vibration or sudden vehicle stops.

8.Connect from source signal by plugging the RCA cables into the input jacks at the amplifier.

9.Connect the speakers. Strip the speaker wires 1/2" and insert into the speaker terminal and tighten the set screw to secure into place. Be sure to maintain proper speaker polarity. DO NOT chassis ground any of the speaker leads as unstable operation may result.

10.Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and ground connections for frayed wires and loose connections which could cause problems. Install inline fuse near battery connection.

NOTE:Follow the diagrams for proper signal polarity.

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Rockford Fosgate Punch 45 manual Installation Wiring the System
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Punch 45 specifications

The Rockford Fosgate Punch 45 is a classic amplifier renowned for its high performance in the world of car audio. With a legacy that dates back decades, this model continues to be a favorite among audiophiles and casual listeners alike. Characterized by its compact size and impressive power output, the Punch 45 delivers a remarkable audio experience without overwhelming your vehicle's space.

One of the main features of the Punch 45 is its RMS power rating, which typically offers around 45 watts per channel. This output ensures that the amplifier can drive most speakers effectively, producing rich, clear sound even at high volumes. The amplifier supports a variety of speaker configurations, making it a versatile choice for many audio setups. Its two-channel design allows for easy integration into existing systems, including powering front and rear speakers or bi-amping coaxial speakers for enhanced performance.

In terms of technology, the Punch 45 incorporates several advanced features. The amplifier uses a high-efficiency Class AB design, which contributes to its lower heat output and improved overall performance. This allows the unit to run cooler compared to other amplifier types, reducing the risk of thermal shutdown during extended use. The Punch 45 also comes equipped with variable high-pass and low-pass filters, enabling users to tailor their sound experience according to personal preferences and speaker capabilities.

The build quality of the Punch 45 is notably robust, with a durable chassis designed to withstand the rigors of automotive environments. Its sleek, minimalistic design incorporates a black finish and easily accessible controls, ensuring a seamless installation process. Additionally, the RCA input options provide compatibility with various sources, such as head units and processors.

Overall, the Rockford Fosgate Punch 45 stands out as a reliable amplifier that seamlessly blends power, versatility, and sound quality. Its combination of advanced features and user-friendly design makes it an excellent choice for anyone looking to enhance their vehicle's audio system. Whether you're a seasoned audiophile or just getting started, the Punch 45 offers the performance and durability needed to elevate your listening experience.
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