Rockford Fosgate PUNCH 4020 DSM User Manual
PUNCH 4020 DSM
4-CHANNEL AMPLIFIER
INSTALLATION & OPERATION
®®
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 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.
To add the finishing touch to your new Rockford Fosgate image order your Rockford
accessories, which include everything from T-shirts and jackets to hats and
sunglasses.
To get a free brochure on Rockford Fosgate products and Rockford accessories,
please call 602-967-3565 or FAX 602-967-8132. In Canada, call Korbon
Trading at 905-567-1929. For International orders, FAX +001-1-602-967-8132
or call +001-1-602-967-3565.
PRACTICE SAFE SOUND™
CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS
OVER 100dB MAY CAUSE PERMANENT HEARING LOSS. HIGH
POWERED AUTO SOUND SYSTEMS MAY PRODUCE SOUND
PRESSURE LEVELS WELL OVER 130dB. USE COMMON SENSE
AND PRACTICE SAFE SOUND.
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 1-800-795-2385. Be sure to
have your serial number, model number and date of purchase available
when you call.
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:____________________
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 Considerations ................................................................ 8
Mounting Location............................................................................ 9
Battery and Charging....................................................................... 10
Wiring the System ........................................................................... 10
Using the XCard.............................................................................. 12
Sample Wiring Diagrams ................................................................ 14
Troubleshooting .............................................................................. 18
Dynamic Power Measurements....................................................... 21
Specifications.................................................................................. 23
Warranty Information...................................................................... 24
GETTING STARTED
Welcome to Rockford Fosgate! This manual is designed to provide
information on the Punch 4020 amplifier for owner, salesperson
and installer. To accomplish this, the manual is divided into five
main sections: Introduction, Installation, Troubleshooting, Specifications and Warranty Information. For those of you who want quick
information on how to install this product, please turn to the Basic
System Diagrams in the Installation section of this manual. Other
information can be located by using the Table of Contents. We, at
Rockford Fosgate, have worked very hard to make sure all the
information in this manual is current. But, as we are constantly
finding new ways to improve our product, this information is subject
to change without notice.
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•
pology which is a fast, short loop circuit allowing the output stage
to be driven with a low voltage drive signal. With the addition of
a 2/4 input selector switch and XCard crossovers, the 4020 can
be configured in many popular system designs without the added
cost of external processors. The result is an excellent sounding
amplifier in a physically compact area.
The Punch 4020 satisfies the need for a powerful 4-channel
amplifier at a competitive price.
We strongly recommend you have your Authorized Rockford
Fosgate Dealer install the new Punch 4020 amplifier. If you do
choose to install it yourself, please be sure to read the entire
manual before beginning.
Ana
to-
PUNCH 4020 AMPLIFIER
ACCESSORY PACK
The accessory pack shipped with the Punch 4020 amplifiers
include the mounting hardware necessary to secure it to the
vehicle as well as attaching the end caps.
Installation & Operation Manual
Punch Verification Certificate
(10)Hex Head screws for speaker and power connectors
(4) Mounting screws for end caps
(4) Mounting screws for amplifier
(1) Allen wrench 7/64"
(1) Allen wrench 13/32"
– 1 –
ROCKFORD FOSGATE ACCESSORIES
The following accessories were designed to enhance the performance 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 amplifiers can deliver.
Punch Link (FG-LINK)
The Punch Link is a specially cast heatsink interconnect which
allows you to join any of our current Punch or Punch Power
amplifiers together. While providing additional cooling through
the coupling process, the Punch Link adds the finishing touch by
giving you the look of one awesome amplifier.
XCard
Additional crossover card frequencies are available for specialized requirements. You can get the following XCards from your
Authorized Rockford Fosgate Dealer.
XM50 = 50Hz XM275 = 275Hz
XM70 = 70Hz XM400 = 400Hz
XM100 = 100Hz XM4.5k = 4,500Hz
XM150 = 150Hz XM6.5k = 6,500Hz
XM200 = 200Hz XM00 = Blank card for
custom crossover
– 2 –
TECHNICAL DESIGN FEATURES
◆ trans•
The trans•
Amplifier) is a novel circuit that utilizes a short-loop complementary topology and advanced Real Time Protection circuitry.
THE RESULT: An amplifier design with the benefits of tube and bipolar transistor amplifier design without the limitations of either.
ana
ana
(TRANS conductance Advanced Non-multiplying
◆ MOSFET Devices
Rockford Fosgate is one of the few manufacturers in any of the
sound communities to utilize MOSFET devices in both the
supply
and the
ductor Field Effect Transistor) devices offer several important
inherent advantages over the 30 year old technology of bi-polar
design. These advantages include: thermal stability, switching
speed, ultra low output impedance and wider bandwidth linearity. In addition, MOSFET and vacuum tubes share many important operating characteristics. However, the MOSFET device is
much faster, wider in bandwidth, measurably lower in distortion
and far more linear than vacuum tubes.
THE RESULT: Operational characteristics of vacuum tubes
without the performance limitations of tube design.
output stages. MOSFET
(Metal Oxide Semicon-
power
◆ 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 three
different ways. They are more compact and more rugged, and
they take much better advantage of the PC board to allow them
to get rid of any heat they generate. Using them wherever
appropriate allows the advantages associated with discrete thruhole circuitry to be retained while also providing room for both
highly advanced processing features and generous PC board
copper paths where needed. Their short lead-out structures allow
maximum audio performance and highest signal-to-noise ratios
– 3 –
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.
Solder
Component
Solder
Figure 1
Thru-Hole Surface Mount
◆ TOP AZ (Tracking Operation Pre-Amplifier Zone)
The
TOPAZ
solves ground loop noise problems common to automotive
amplifier design. This innovative new development allows vastly
improved isolation of the input signal grounds from the power
supply ground of the amplifier. This is accomplished by allowing
the source unit to control the potential “environment” of the
entire input structure or “zone” of the amplifier. This process
improves the noise rejection of the amplifier by 30-40dB – an
astounding 30-100 times better than amplifiers without TOPAZ.
THE RESULT: Elimination of troublesome ground loop noise
between source and amplifier.
(Tracking Operation Pre-Amplifier Zone) circuitry
– 4 –
◆ XCard (Internal Crossover)
The Punch 4020 amplifier utilizes internal active crossovers. These
crossovers have many performance advantages such as using discrete components for exact frequency adjustments which are far
superior to potentiometers. Additionally, the
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 precise
electronic crossover without the limitations of conventional poten-
tiometer designs.
XCard
can be config-
◆ RTP (Real Time Protection)
NOMAD (NOn-Multiplying Advanced Decision)
The Punch 4020 amplifier uses an
absolutely maximize safe output power under all operating conditions. Rockford Fosgate pioneered and developed
Protection), a crucial element in the performance edge of our
amplifiers. The innovative
Decision) system is the most sophisticated version of this technique
ever used, bringing previously unavailable levels of accuracy,
stability, temperature immunity and reliability to this critical process. NOMAD makes advanced decisions based on device voltages
to precisely control the awesome levels of current available in the
output MOSFETs to safe values – but only when absolutely needed.
THE RESULT: Extremely fast protection system that always protects
the amplifier and never degrades the sound.
NOMAD
analog computer process
RTP
(Real Time
(NOn-Multiplying Advanced
to
– 5 –
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.
8
6
R
L
Rear
Rear Gain
4
– L +
(Bridged Mono)
Rear Speakers
3
– R +
10
POWER
+ L –
(Bridged Mono)
Front Speakers
5
REM
3
+ R –
8
Front Gain
6
R
L
Front
B+ GND
3. Speaker Terminals – The heavy duty, gold-plated terminal block
connectors (+ and –) will accept wire sizes from 8 AWG to 18
AWG. These gold-plated connectors are immune to corrosion
that can cause signal deterioration.
4. Power Terminals – The power and ground connectors on the
Punch amplifier are gold-plated and will accommodate up to 8
AWG wire maximizing the input current capability of the
amplifier.
5. REM Terminal – This spade terminal is used for the AP (auto
power) or remote turn on of the Punch amplifier.
– 6 –
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