Rockford Fosgate P38D2 User manual

Installation &
Operation
Installation et fonctionnement
Instalación y funcionamiento
Einbau und Betrieb
Installazione e funzionamento
Punch Series
DVC - DualVoice CoilWoofers
P38D2
P38D4
P310D2
P310D4
P312D2
P312D4
P315D2
P315D4

INTRODUCTION
2
TABLE OF CONTENTS
Dear Customer,
Congratulations on your purchase of the world's finest brand of car audio speakers.At Rockford Fosgate we are
fanatics about musical reproduction at its best,and we are pleased you chose our product.Through years of engi-
neering 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 RockfordTechnicalTraining 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 Rockford Fosgate image order your Rockford accessories, which include
everything fromT-shirts and jackets to hats and sunglasses.
To get a free brochure on Rockford Fosgate products and Rockford accessories,
visit our web site at: www.rockfordfosgate.com
or,in the U.S. call 1-800-669-9899 or FAX [phone].
For all other countries,call +001-480-967-3565 or FAX [phone].
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.
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Instructions . . . . . . . . . . . . . . . . . . . 3
Design Features. . . . . . . . . . . . . . . . . . . . . . 3
Recommended Enclosures . . . . . . . . . . . 4-5
Sealed Enclosures . . . . . . . . . . . . . . . . . . . . . 4
Vented Enclosures. . . . . . . . . . . . . . . . . . . . . 5
NOTE:Review each section for more detailed information.
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.
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 product if it is ever stolen.
Serial Number:______________________________________
Model Number: _____________________________________
Wiring Configurations . . . . . . . . . . . . . . . . 6
Building an Enclosure . . . . . . . . . . . . . . . . . 7
CalculatingVolumes. . . . . . . . . . . . . . . . . . . . 7
Subwoofer Crossovers . . . . . . . . . . . . . . . . 7
Specifications. . . . . . . . . . . . . . . . . . . . . . . . 8
LimitedWarranty Information . . . . . . . . . 9

3
www.rockfordfosgate.com
SAFETY INSTRUCTIONS
CONTENTS OF CARTON
Visit our web site for the latest information on all Rockford products.
GETTING STARTED
Welcome to Rockford Fosgate! This manual is designed to provide information for the owner,
salesperson and installer.For those of you who want quick information on how to install this product,
please turn to 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.
This symbol with“WARNING” is intended to alert the user to the
presence of important instructions.Failure to heed the instructions
will result in severe injury or death.
This symbol with“CAUTION” is intended to alert the user to the
presence of important instructions.Failure to heed the instructions
can result in injury or unit damage.
CAUTION:To prevent injury and damage to the unit,please read and follow the
instructions in this manual.We want you to enjoy this system, not get a
headache.
CAUTION If you feel unsure about installing this system yourself,have it installed by a
qualified Rockford Fosgate technician.
CAUTION Before installation,disconnect the battery negative (-) terminal to prevent
damage to the unit,fire and/or possible injury.
Punch DVCWoofer
Trim Ring Screw Pack Installation & Operation Manual
The Punch DVCWoofers are high performance, low frequency drivers with dual voice coils.These
woofers were designed for use primarily in small sealed and small ported enclosures.By utilizing the latest
materials and construction techniques,we are able to offer a speaker with high output at low frequencies
while requiring a minimum of operating space.
DESIGN FEATURES

4
RECOMMENDED ENCLOSURES
This manual outlines two specific types of enclosures that provide distinctly different performance.This
section is to help you decide which type is best for your application.
SEALED ENCLOSURES
Sealed enclosures are the simplest to build.The most important part of building a sealed enclosure is to
make sure that the enclosure is airtight. Using glue and some type of sealant on all seams will ensure solid
construction and prevent air leaks.The box volume will directly impact the performance of the speaker.
Larger enclosures will provide flatter response and deeper bass where smaller boxes will provide a bump
in the response curve and generally higher output for greater SPL.
Advantages of sealed enclosures:
• Small enclosures
• Linear (Flat) response
• No port noise
• High power handling at all frequencies
• Excellent for sound quality
• Extended low frequency output when
compared to vented enclosures

5
RECOMMENDED ENCLOSURES
VENTED ENCLOSURES
Vented enclosures vary only from the sealed enclosure in that a vent or port is added to“tune” the
enclosure.The enclosures recommended are designed for great overall performance. Larger boxes tend to
be easy to tune to lower frequencies while medium and small boxes are easier to tune to higher
frequencies.The vented design is less linear in response than the sealed box but with noticeably more
output at the tuning frequency.
Advantages of vented enclosures:
• Higher average output than sealed
• Tuning frequency can be easily adjusted by
changing port length
• Deep bass response with lower power
requirements
• Great for high output with limited power

6
WIRING CONFIGURATIONS
By varying the wiring configuration of your speakers you can create an impedance load to match your
system.Since each voice coil of a DVC speaker carries its own impedance, altering the wiring
configurations gives a range of options for impedance loads. Series, Parallel,or Series-Parallel wiring
configurations are different techniques for wiring speakers that provide different loads. Series
configuration is a string method where speakers are wired end to end.Parallel configuration uses
two or more speakers wired across common terminals.Series-Parallel configuration combines both
techniques.Choose the wiring diagram below that corresponds to the number of woofers and the
impedance of your amplifier.

7
BUILDING AN ENCLOSURE
To work properly, the walls of the enclosure must be rigid and not flex when subjected to the high
pressures generated by the speaker's operation. For optimum performance, we recommend using 3/4"
MDF (Medium Density Fiberboard) and internal bracing.The enclosure should be glued together and
secured with nails or screws.
CALCULATINGVOLUME
Calculating volume is merely a matter of measuring the dimensions in inches and using the formula:
SUBWOOFER CROSSOVERS
There are two operational types of crossovers,passive and active. Passive crossovers (coils or inductors)
are placed on the speaker leads between the amplifier and speaker.An active crossover is an electronic
filter which separates the audio signal fed to different amplifiers.For optimum subwoofer performance,we
recommend using an active 80-100Hz low-pass crossover at 12dB/octave.
BoxVolume = Height “ xWidth” x Depth”
(cubic feet) 1728 cu. in./cu. ft.
If two facing sides are of uneven length,add them together and divide by two to take the average. Using
this number will give you the volume without the necessity of calculating the box in sections and adding
the sections together.The thickness of the baffle material reduces the internal volume so this must be
subtracted from the outside dimensions to determine the internal volume.The speaker itself also reduces
the internal volume.The amount of air displaced by each model is listed on the specification sheet and
should also be subtracted from the gross volume calculation.

8
Specifications subject to change without notice
SPECIFICATIONS
FEATURES - Punch DVC P3
• Parabolic Injection Molded Polypropylene Cone
• 2" and 2.5"AluminumVoice Coil Former
• CastAluminum Basket with SpiderVenting
• 77 and 102oz.Double Stacked Motor
Structures
• Linear Spider
• Optimized for Sealed andVented Enclosures
Model - Punch DVC P38D2 P38D4 P310D2 P310D4
Nominal Impedance (ohms) 2 (2) 4 (2) 2 (2) 4 (2)
Voice Coil Diameter-inch (mm) 2 (50.8) 2 (50.8) 2.5 (63.5) 2.5 (63.5)
FS (Hz) 39 42 27 28
QTS 0.471 0.517 0.520 0.564
VAS-cu.ft.(liter) 0.228 (6.48) 0.228 (6.48) 0.92 (26) 0.92 (26)
Xmax-inch (mm) 0.43 (11.0) 0.43 (11.0) 0.47 (12.0) 0.47 (12.0)
SPL (dB @ 1w/1m) 80.7 81.1 85.0 85.0
Power Handling (RMS) 250 250 400 400
Power Handling (Max) 500 500 800 800
Mounting Dia.-inch (mm) 7-1/8 (180.98) 7-1/8 (180.98) 9-5/16 (236.54) 9-5/16 (236.54)
Mounting Depth-inch (mm) 5-1/16 (128.59) 5-1/16 (128.59) 5-15/16 (150.81) 5-15/16 (150.81)
Speaker Dis.-cu.ft.(liter) 0.043 (1.22) 0.043 (1.22) 0.062 (1.76) 0.062 (1.76)
Sealed BoxVol.-cu. ft.(liter) 0.3 (8.5) 0.3 (8.5) 0.65 (18.41) 0.65 (18.41)
Vented BoxVol.-cu.ft.(liter) 0.625 (17.7) 0.625 (17.7) 1.25 (35.40) 1.25 (35.40)
Port Diameter & Length (in.) (1) 2.5 x 13.5 (1) 2.5 x 13.5 (1) 3 x 7.3 (1) 3 x 7.3
Port Diameter & Length (cm) (1) 6.35 x 34.29 (1) 6.35 x 34.29 (1) 7.62 x 18.54 (1) 7.62 x 18.54
Model - Punch DVC P312D2 P312D4 P315D2 P315D4
Nominal Impedance (ohms) 2 (2) 4 (2) 2 (2) 4 (2)
Voice Coil Diameter-inch (mm) 2.5 (63.5) 2.5 (63.5) 2.5 (63.5) 2.5 (63.5)
FS (Hz) 25 26 22 23
QTS 0.398 0.456 0.489 0.546
VAS-cu.ft.(liter) 1.77 (50) 1.77 (50) 5.12 (145) 5.12 (145)
Xmax-inch (mm) 0.47 (12.0) 0.47 (12.0) 0.47 (12.0) 0.47 (12.0)
SPL (dB @ 1w/1m) 87.0 87.0 88.0 88.0
Power Handling (RMS) 500 500 500 500
Power Handling (Max) 1000 1000 1000 1000
Mounting Dia.-inch (mm) 10-13/16 (274.64) 10-13/16 (274.64) 13-13/16 (350.84) 13-13/16 (350.84)
Mounting Depth-inch (mm) 6-3/8 (161.93) 6-3/8 (161.93) 7-5/8 (193.68) 7-5/8 (193.68)
Speaker Dis.-cu.ft.(liter) 0.082 (2.32) 0.082 (2.32) 0.107 (3.03) 0.107 (3.03)
Sealed BoxVol.-cu. ft.(liter) 0.75 (21.24) 0.75 (21.24) 2.00 (56.63) 2.00 (56.63)
Vented BoxVol.-cu.ft.(liter) 1.75 (49.55) 1.75 (49.55) 2.50 (70.79) 2.50 (70.79)
Port Diameter & Length (in.) (1) 4 x 11 (1) 4 x 11 (1) 4 x 9.4 (1) 4 x 9.4
Port Diameter & Length (cm) (1) 10.16 x 27.94 (1) 10.16 x 27.94 (1) 10.16 x 23.88 (1) 10.16 x 23.88
Number of ports noted in ( )
Number of ports noted in ( )

9
LIMITED WARRANTY INFORMATION
Ship to: Electronics
Rockford Corporation
Warranty Repair Department
2055 E.5th Street
Tempe,AZ 85281
RA#:_______________________
Ship to: Speakers
RockfordAcoustic Design
Speaker Returns
3056Walker Ridge Dr.
Walker, MI 49544
RA#:___________________
Rockford Corporation offers a limited warranty on Rockford Fosgate products on the
following terms:
Length ofWarranty
Source Units,Speakers,Signal Processors and PUNCHAmplifiers – 1Year
POWERAmplifiers – 2Years Type RFAmplifiers – 3Years
Any Factory Refurbished Product – 90 days (receipt required)
What is Covered
This warranty applies only to Rockford Fosgate products sold to consumers byAuthorized
Rockford Fosgate Dealers in the United States ofAmerica or its possessions.Product
purchased by consumers from anAuthorized Rockford Fosgate Dealer in another country are
covered only by that country’s Distributor and not by Rockford Corporation.
Who is Covered
This warranty covers only the original purchaser of Rockford product purchased from an
Authorized Rockford Fosgate Dealer in the United States.In order to receive service,the
purchaser must provide Rockford with a copy of the receipt stating the customer name,dealer
name,product purchased and date of purchase.
Products found to be defective during the warranty period will be repaired or replaced
(with a product deemed to be equivalent) at Rockford's discretion.
What is Not Covered
1.Damage caused by accident,abuse,improper operations,water,theft,shipping
2.Any cost or expense related to the removal or reinstallation of product
3.Service performed by anyone other than Rockford or anAuthorized Rockford Fosgate
Service Center
4.Any product which has had the serial number defaced,altered,or removed
5.Subsequent damage to other components
6.Any product purchased outside the U.S.
7.Any product not purchased from anAuthorized Rockford Fosgate Dealer
Limit on ImpliedWarranties
Any implied warranties including warranties of fitness for use and merchantability are limited in
duration to the period of the express warranty set forth above.Some states do not allow limitations
on the length of an implied warranty,so this limitation may not apply.No person is authorized to
assume for Rockford Fosgate any other liability in connection with the sale of the product.
How to Obtain Service
Contact theAuthorized Rockford Fosgate Dealer you purchased this product from.
If you need further assistance,call 1-800-669-9899 for Rockford Customer Service.You must
obtain an RA# (ReturnAuthorization number) to return any product to Rockford Fosgate.You
are responsible for shipment of product to Rockford.
EUWarranty
This product meets the current EU warranty requirements,see yourAuthorized dealer for
details.

Rockford Fosgate
Rockford Corporation
546 South Rockford Drive
Tempe,Arizona 85281 U.S.A.
In U.S.A., [phone]
In Europe,Fax [phone]
In Japan,Fax [phone]
www.rockfordfosgate.com
08/04 B.M.
1230-51239 Printed in U.S.A