Rockford Fosgate 45.2 User Manual

® ®

2-channel amplifier

car audio

for

fanatics

Installation Reference Sheet
Páginas de Referencia para la Instalación
Schéma d’Installation
Installations Beiblatt

punch

Istruzioni di Installation

®

Dear Customer,

Congratulations on your purchase of the world's finest brand of car audio electronics. 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 installed by an Authorized
Rockford Fosgate Dealer, as we provide specialized training through Rockford Technical Training Institute (RTTI).
Please read your warranty and retain your receipt and original carton for possible future use.

Great product and competent installations are only a piece of the puzzle when it comes to your system. Make sure that
your installer is using 100% authentic installation accessories from Connecting Punch in your installation.
Connecting Punch has everything from RCA cables and speaker wire to Power line and battery connectors. Insist on
it! After all, your new system deserves nothing but the best.

To add the finishing touch to your new fanatic image order your Rockford Fosgate wearables, which include everything
from T-shirts and jackets to hats and sunglasses.

To get a free brochure on Rockford Fosgate products and Rockford wearables, please call 602-967-3565 or FAX 602­967-8132. For International orders, FAX [phone] or call +001-1-602-967-3565.

PRACTICE SAFE SOUND™

CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100dB MAY CAUSE PERMANENT HEARING LOSS.

IGH POWERED AUTOSOUND SYSTEMS MAY PRODUCE SOUND PRESSURE LEVELS WELL OVER 130dB. USE

H

COMMON

If, after reading your manual, you still have questions regarding this product, we recommend that you see your Rockford Fosgate dealer. If you
need further assistance, you can call us direct at 1-800-669-9899. Be sure to have your serial number, model number and date of purchase
available when you call.

SENSE AND PRACTICE SAFE SOUND.

The serial number can be found on the outside of the box. Please record it in the space provided below as your permanent record. This will
serve as verification of your factory warranty and may become useful in recovering your amplifier if it is ever stolen.

Serial Number:_____________________________________________

Model Number: ____________________________________________

– 1 –

Punch 45.2

TECHNICAL FEATURES

2-Channel Punch Amplifier

FEATURES

Specification

Reference

Sheet

• Trans•ana – Sound quality topology that sends an extended bandwidth

accurately to the output stages of the amplifier

• TOPAZ – Eliminates troublesome ground loop noise between the source

and amplifier

• NOMAD – Extremely fast protection system that always protects the

amplifier and never degrades the sound

• MOSFET Devices – Power supply and output devices that have high

thermal stability, fast switching speed, low output impedance, and wide
bandwidth linearity

• DSM (Discrete Surface Mount) Technology – Fewer

connections, improved reliability, shorter signal paths, superior signal-to­noise ratio and awesome sonic performance

DESIGN FEATURES

• Diecast Heatsink – Dissipates heat generated by the amplifier’s

circuitry

SPECIFICATIONS

RMS Continuous Power @ 14.4V (Competition Standard)

Stereo into a 4Ω load (20Hz-20kHz, <0.05% THD) ......... 22.5x2

Stereo into a 2Ω load (20Hz-20kHz, <0.10% THD) ............ 45x2

Bridged into a 4Ω load (20Hz-20kHz, <0.10% THD).......... 90x1

Dynamic Power @ 14.4V (IHF Standard)

Stereo into a 4Ω load (20Hz-20kHz, 1% THD) ................... 50x2

Stereo into a 2Ω load (20Hz-20kHz, 1% THD) ................... 85x2

Bridged into a 4Ω load (20Hz-20kHz, 1% THD) ............... 170x1

Signal-to-Noise Ratio ................................ >100dB (A-weighted)

Frequency Response .................................. 20Hz-20kHz ±0.5dB

Bandwidth .............................................. 10Hz-250kHz ±3.0dB

Damping Factor @ 4Ω...................... >200 (at output connector)

• Gold-Plated RCA Input Jacks – Maintains signal quality by resisting

corrosion

• Input Sensitivity Control – Level control can be adjusted to match

output levels from a variety of source units

• Gold-Plated Power/Speaker Barrier Strip – Screw terminals

accept #10 spade lugs or bare wire sized from 10 to 18 AWG

• Crossover Switch – Crossover can be set for low-pass operation or full

range

• Bass EQ – The Bass EQ allows a narrow band adjustment of up to +18dB

centered at 45Hz. The bass boost can be bypassed by turning the control to
its minimum or counterclockwise position

• LED Power Indicator – Visual indicator illuminates when amplifier is

turned on

WARRANTY

• 3 Years

Slew Rate ....................................................................30v/µs

IM Distortion (IHF) ..................................................... <0.05%

Input Impedance............................................................ 20kΩ

Factory Default Crossover............................80Hz low-pass fixed

Crossover Slope...................................12dB/octave Butterworth

Source Unit Compatibility (+15dB gain overlap) ..........20V max.

Input Sensitivity (0dB gain overlap) ....................200mV to 3.5V

Operating Voltage ........................................ +9V to +15.4V DC

External Battery Fuse ................................................ 20A (ATC)

Standby Current 700mA

Dimensions...................................... 25⁄8"H x 95⁄8"W x 109⁄32"L

(6.6cm x 24.4cm x 26.1cm)

Weight ........................................................ 5.7 lbs. (2.58kg)

ACCESSORY PACK

(1) Punch Verification Certificate
(4) Amplifier Mounting Screws (#8 x 3/4” Phillips)
(1) 9/64” Allen Wrench

®®

– 2 –

(4) 9/64” End Cap Mounting Screws
(1) ATC In-line Fuseholder
(1) ATC 20 Amp Fuse

Specifications subject to change without notice

Punch 45.2

2-Channel Punch Amplifier

Installation

Reference

Sheet

80Hz Low-Pass
Xover Frequency

0dB
–3dB

80Hz

Full Range
Xover Frequency

0dB
–3dB

20Hz

Bridged/Mono 4 ohm

Bridged/Mono
Woofer

Extension RCA's (opt.)

Full

80Hz LP

Range

20kHz

Left

Xover

Input

®®

33Hz 45Hz

Right
Input

67.5Hz

+18
+12

0dB

Bass

+6
+3

EQ

Stereo 2 or 4 ohm

Left (+)

+

Left
Speaker

–

Right (–)

33Hz 45Hz

Right
Speaker

Gain

LED

67.5Hz

+

–

+

–

AUD

PWR

VOL

® ®

L– R+ R– B+ REM GND

L+

CLOCK

AUTO

P.SCN LOUDDSPL

RPT

SCAN

D.SCN

1 234 65

20A
Fuse

Less than 18"

ILLUM

RDM

DIM

PAUSE

Remote Turn-On

Battery +12V

SEL

TUNE

+ –

Battery

R

Full

80Hz LP

Range

Xover

®®

Simultaneous Bridged/Mono 4 ohm with Stereo 2 or 4 ohm

Use passive crossovers when running amplifier in
Stereo & Bridged/Mono mode simultaneously. Please
contact your Authorized Rockford Fosgate Dealer for
information on passive crossovers.

Bridged/Mono
Woofer

Left

Input

Left (+)

+

–

Right (–)

Input

BassEQGainRight

Left
Speaker

Right
Speaker

LED

+

–

+

–

– 3 –

L+

L– R+ R– B+ REM GND

Set crossover switch for Full Range only

0dB
–3dB

Full Range
Xover Frequency

20kHz

20Hz

I

NSTALLATION

• For safety, disconnect the negative lead from the car battery prior to beginning the installation
Trunk Mounting

Mounting the amplifier vertically on a surface with the fin grooves running up and down will provide the best cooling for the amplifier.

Passenger Compartment Mounting

Mounting the amplifier in the passenger compartment will work as long as you provide a sufficient amount of air for the amplifier to cool
itself. If you are going to mount the amplifier under the seat of the vehicle, you must have at least 1” (2.54cm) of air gap around the
amplifier’s heatsink.

B+ Terminal

The B+ cable MUST be fused 18” (45cm) or less from the vehicle’s battery. Prepare the cable ends and install the fuseholder under the
hood. Connections should be water tight.

GND Terminal

Prepare a length of cable to be used for the ground connection. Prepare the chassis ground by scraping any paint from the metal surface
and thoroughly clean the area of all dirt and grease. Fasten the cable to the chassis using a screw.

REM Terminal

Connect the REM wire to a switched 12 volt positive source. The switched signal is usually taken from the source unit’s auto antenna or
the accessory lead. If the source unit does not have these outputs available, the recommended solution is to wire a mechanical switch in­line with a 12 volt source to activate the amplifier.

Input Connectors

Follow the diagram and connect the appropriate signal cables to the input terminals of the amplifier. Be sure that the signal cables are
routed close together and away from any high current wires.

Speaker Output Terminals

Connect the speaker system to the amplifier by inserting the wires into the corresponding output terminals and tighten the set screws.
Follow the diagram for proper signal polarity. DO NOT chassis ground any of the speaker wires as unstable amplifier operation may

result. CAUTION: This amplifier is not recommended for impedance loads below 2Ω stereo and/or 4Ω bridged (mono).
Gain Control(s)

The amplifier is factory set for optimum dynamic range. The system levels may be adjusted by ear when using a source unit with higher or
lower output levels by using the following procedure.

1. Turn the gain control to minimum (counterclockwise)

2. Play a music track with high dynamic content and turn up the source unit to at least 3/4 volume

3. Slowly increase the gain and set it just below audible distortion or until reaching a comfortable hearing threshold (whichever occurs
first)

T

ROUBLESHOOTING

Symptom Diagnosis Remedy

Amplifier does not turn on.

Amplifier Noise

(Turn-On Pop)

B+ or REM not between 10.5 and 15.5 volts or
no voltage present

Amplifier is not properly grounded.
Voltage spike from source unit is entering

amplifier’s input

Check the alternator, battery, fuse, and
wiring and repair as necessary

Check wiring and repair as necessary
Connect turn-on module to REM terminal if

pops are eliminated with no input signal to
amplifier

Engine Noise

Noise is radiating into signal cables

– 4 –

Re-route signal cables away from sources
of high current