® ®

c a r a u d i o f a n a t i c sforpunch

®

RFP2408/2808

RFP2410/2810

RFP2412/2812

RFP2415/2815

RFP2418/2818

Dear Customer,

Congratulations on your purchase of the world's finest brand of car audio speakers. AtRockford Fosgate we are fanatics about musical reproduction at its best, and we arepleased you chose our product. Through years of engineering expertise, hand craftsman-ship and critical testing procedures, we have created a wide range of products thatreproduce music with all the clarity and richness you deserve.

For maximum performance we recommend you have your new Rockford Fosgateproduct installed by an Authorized Rockford Fosgate Dealer, as we provide specializedtraining through Rockford Technical Training Institute (RTTI). Please read yourwarranty 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 comesto your system. Make sure that your installer is using 100% authentic installationaccessories from Connecting Punch in your installation. Connecting Punch haseverything 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 Rockfordwearables, which include everything from T-shirts and jackets to hats and sunglasses.

To get a free brochure on Rockford Fosgate products and Rockford wearables, in the U.S.call 602-967-3565 or FAX 602-967-8132. For all other countries, call +001-602-967-3565 or FAX +001-602-967-8132.

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

Serial Number: ________________________________

Model Number: ________________________________

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

PRACTICE SAFE SOUND™CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER

100dB MAY CAUSE PERMANENT HEARING LOSS. HIGH

POWERED AUTOSOUND SYSTEMS MAY PRODUCE SOUND

PRESSURE LEVELS WELL OVER 130dB. USE COMMON SENSE

AND PRACTICE SAFE SOUND.

TABLE OF CONTENTS

Introduction ............................................................................................. 1RF Punch XLC Woofer Contents ............................................................... 1Technical Design Features ....................................................................... 1

Stamped Basket .................................................................................. 1PVA Cone .......................................................................................... 1Inverted Dust Cap .............................................................................. 1Aluminum Voice Coil Former ............................................................. 2Progressive Dual Laminated Spider .................................................... 2Dual Laminated Foam Surrounds ....................................................... 2Hyper-Extended Pole Piece ................................................................ 2Vented Bumped Back Plate ................................................................ 2

Installation ............................................................................................... 3Recommended Enclosures .................................................................. 3Building An Enclosure ........................................................................ 5Calculating Volume ............................................................................ 5Subwoofer Crossovers ........................................................................ 5Wiring Configurations ........................................................................ 6

Specifications ........................................................................................... 7Warranty Information ............................................................................... 8International Information.......................................................................... 9

Welcome to Rockford Fosgate! This manual is designed to provideinformation for the owner, salesperson and installer. For those of youwho want quick information on how to install this product, please turnto the Installation Section of this manual or refer to the icon listed below.Other information can be located by using the Table of Contents. We,at Rockford Fosgate, have worked very hard to make sure all theinformation in this manual is current. But, as we are constantly findingnew ways to improve our product, this information is subject to changewithout notice.

G E T T I N G S TA R T E D

INSTALLATION

® ®

Sections markedINSTALLATION

include “slam dunk”assembly and wiring

directions

– 1 –

INTRODUCTION

The RF Punch XLC Woofers are a full line of low frequency drivers sizedfrom 8" to 18" and are available in 4 or 8 ohm impedance. The RF PunchXLC woofers were designed for use primarily in small, sealed or portedenclosures. By utilizing the latest materials and construction tech-niques, we are able to offer a speaker with high output at lowfrequencies while requiring a minimum of operating space.

RF PUNCH WOOFER CONTENTS

RF Punch XLC WooferInstallation & Owner's Manual4 Foam Gaskets

TECHNICAL DESIGN FEATURES

Stamped BasketThe RF Punch XLC Woofers use a stamped Cold Rolled Steel basketwhich is rigid and lightweight. The basket is finished in a corrosiveresistant powder coated process used in many automotiveapplications.

THE RESULT: A lightweight and rigid woofer

PVA Cone

The cone material used is spruce pulp paper. This provides thenecessary combination of weight and strength and allows high levelsof output without cone break up. The cone is treated with a waterresistant PolyVinyl Acetate (PVA) Emulsion which increases the conerigidity and lowers distortion.

THE RESULT: Increases cone rigidity and lowers distortion

Inverted Dust Cap

The use of the inverted dust cap serves to increase the cone rigidityand improve the power handling by forcing more air through thevoice coil.

THE RESULT: Increases cone rigidity, smooths frequency responseand prevents your friends from feeling obligated to invert them for you.

– 2 –

Aluminum Voice Coil Former

The voice coil former is black, anodized aluminum for highly efficientthermal transfer. This allows winding high temperature copper wirein multiple layers for improved efficiency.

THE RESULT: Improves power handling by efficiently dissipating heat

Flat Progressive Dual Laminated Spider

A flat progressive dual laminated spider is employed to providestronger suspension for the woofer. A secondary spider is fused to theprimary spider near the critical voice coil bonding point. The combi-nation of these two spiders, in addition to the progressive rolls,provides the ultimate in linear control for high excursion capability.

THE RESULT: Strengthens suspension for higher excursion capability

Dual Laminated Foam Surrounds

The RF Punch XLC Woofers employ a dual laminated foam surroundfor the front of the woofer's suspension. Dual lamination improvesreliability by making the woofer mechanically stronger.

THE RESULT: Adds mechanical strength

Hyper-Extended Pole Piece

The pole piece has been extended to provide a more linear magneticfield for the operation of the woofer. This lowers distortion andprovides the woofer with better low frequency response.

THE RESULT: Lowers distortion and provides better low frequencyresponse

Vented Bumped Back Plate

The back plate has been stepped deeper to allow the woofer moreexcursion without bottoming out. This enables the speaker to be usedin a smaller enclosure. Additionally, the back plate is vented with aradiused aerodynamic back vent which efficiently and quietly circu-lates cool air around the voice coil.

THE RESULT: More excursion and increased power handling

– 3 –

INSTALLATION

Recommended EnclosuresPunch 8"

Recommended Sealed .30ft3 (8.50L)

D = 8"(20.32cm)

H =

11"

(27.

94cm

)

W = 11"(27.94cm)

Punch 10"

Recommended Sealed .75ft3 (21.24L)

D = 10"(25.40cm)

H =

14"

(35.

56cm

)

W = 15"(38.10cm)

Punch 12"Recommended Sealed 1.25ft3 (35.40L)

D = 12"(30.48cm)

H =

14"

(35.

56cm

)

W = 19-3/4"(50.17cm)

INSTALLATION

® ®

D = 8"(20.32cm)

H =

11"

(27.

94cm

)

W = 19.75"(50.16cm)

Range in Cubic Feet

1 2 3 4 5 6

.50

.6250.

3

D = 13.5"(34.29cm)

H =

13"

(33.

02cm

)

W = 15"(38.1cm)

Range in Cubic Feet

1 2 3 4 5 60.3

.75

D = 14"(35.56cm)

H =

18"

(45.

72cm

)

W = 20.5"(52.07cm)

Range in Cubic Feet

1 2 3 4 5 6

0.3

1.50

2.50

Range in Cubic Feet

1 2 3 4 5 60.3

.50

1.50

Range in Cubic Feet

1 2 3 4 5 60.3

.625

1.50.7

5

Range in Cubic Feet

1 2 3 4 5 60.3

1.25

1.75

Recommended Ported .625ft3 (17.70L)

Fb = 40 HzPd = 2.5" (6.35cm)Pl = 11.25" (28.57cm)

Recommended Ported 1.0 ft3 (28.32L)

Fb = 35 HzPd = 3" (7.62cm)Pl = 13.25" (33.65cm)

Recommended Ported 2.0 ft3 (56.63L)

Fb=35 HzPd=4" (10.16cm)Pl=10.75" (27.30cm)

– 4 –

INSTALLATION

® ®

Recommended Sealed 4.0ft3 (113.27L)

Punch 15"

Recommended Sealed 2.5ft3 (70.79L)

D = 12"(30.48cm)

H =

20"

(50.

80cm

)

W = 25"(63.50cm)

D = 12"(30.48cm)

H =

20"

(50.

80cm

)

W = 25"(63.50cm)

Range in Cubic Feet

1 2 3 4 5 60.3

2.50

2.25

Range in Cubic Feet

1 2 3 4 5 60.3

2.50

3.50

Punch 18"

Recommended Enclosures

Fb = 35 HzPd = 4" (10.16cm)Pl = 8" (20.32cm)

Recommended Ported 2.5ft3 (70.79L)

Range in Cubic Feet

1 2 3 4 5 60.3

2.50

D = 14"(35.56cm)

H =

20.

5"(5

2.0c

m)

W = 32.5"(82.55cm)

Range in Cubic Feet

1 2 3 4 5 60.3

Recommended Ported 4.0ft3 (113.27L)

Fb=30 HzPd=2 x 4" (2 x 10.16cm)Pl=14.5" (36.83cm)

D = 14"(35.56cm)

H =

20.

5"(5

2.0c

m)

W = 32.5"(82.55cm)

Building an EnclosureTo work properly, the walls of the enclosure must be rigid and not flexwhen subjected to the high pressures generated by the speaker'soperation. For optimum performance, we recommend using 3/4"MDF (Medium Density Fiberboard) and internal bracing. The enclo-sure should be glued together and secured with nails or screws. MDFis porous; therefore, it is suggested to also seal the outside walls withpolyurethane.

Calculating VolumeCalculating volume is merely a matter of measuring the dimensionsin inches and using the formula:

1728"Height x Width x DepthBox Volume =

(cubic feet)

If two facing sides are of uneven length, add them together and divideby two to take the average. Using this number will give you thevolume without the necessity of calculating the box in sections andadding the sections together. The thickness of the baffle materialreduces the internal volume so this must be subtracted from theoutside dimensions to determine the internal volume. The speakeritself also reduces the internal volume. The amount of air displacedby each model is listed on the specification sheet and should also besubtracted from the gross volume calculation.

Subwoofer CrossoversThere are two operational types of crossovers, passive and active.Passive crossovers (coils or inductors) are placed on the speaker leadsbetween the amplifier and speaker. An active crossover is an elec-tronic filter which separates the audio signal fed to different amplifi-ers. For optimum subwoofer performance, we recommend using anactive 80-100Hz low-pass crossover at 12dB/octave.

– 5 –

– 6 –

Wiring ConfigurationsThree configurations for connecting speakers to an amplifierare Series, Parallel, and Series-Parallel wiring. A Series con-figuration consists of two or more speakers wired in an string(end to end). A Parallel configuration consists of two or morespeakers wired with the common terminals connected acrosseach other. A Series-Parallel configuration is a combination ofboth methods. Determine which method will be compatiblewith your amplifier.

RT = R1 + R2 + R3 + etc. 1 1 1 1 1= + + + + etc.

RT R1 R2 R3 R4

Series Wiring Parallel Wiring

4Ω load 4Ω load

+ – + –

+ –8Ω load

8Ω load 8Ω load

+ – + –

+ –4Ω load

• RT indicates the total speaker load• R1, R2, etc. indicates each speaker in the system• Red dot indicates “+” terminal of 8 ohm speaker• Purple dot indicates “+” terminal of 4 ohm speaker

+ –

4Ω load 4Ω load

+ –

4Ω load 4Ω load

+ –

+ –4Ω load

+ –+ –

Series-Parallel Wiring

INSTALLATION

® ®

– 7 –

SP

EC

IFIC

AT

ION

S

Mod

elR

FP24

08R

FP28

08R

FP24

10R

FP28

10R

FP24

12R

FP28

12R

FP24

15R

FP28

15R

FP24

18R

FP28

18

Nom

inal

Impe

danc

e4

84

84

84

84

8

FS (H

z)35

3730

3228

3023

2522

24

RE

(Ohm

)3.

77.

33.

77.

33.

77.

33.

77.

33.

97.

8LE

(mH

)3.

35.

23.

35.

23.

35.

23.

35.

23.

86.

7

QM

S6.

186.

635.

385.

236.

205.

915.

515.

505.

255.

70

QES

0.39

0.50

0.39

0.47

0.52

0.71

0.42

0.55

0.49

0.57

5

QTS

0.37

0.47

0.36

0.43

0.48

0.64

0.39

0.50

0.46

0.52

2

VA

S (c

u.ft.

)0.

635

0.63

51.

621.

624.

234.

2311

.86

11.8

614

.44

14.4

4

VA

S (li

ter)

1818

4646

120

120

336

336

409

409

Pow

er (W

atts

RM

S)20

020

020

020

020

020

020

020

025

025

0

Pow

er (W

atts

Pea

k)40

040

040

040

040

040

040

040

050

050

0

SPL

(dB

@ 1

w/1

m)

8585

8787

8989

9292

9292

X-M

AX

(inc

hes)

0.31

0.31

0.31

0.31

0.31

0.31

0.31

0.31

0.39

0.39

X-M

AX

(mm

)8

88

88

88

810

10

Seal

ed B

ox V

ol. (

cu. f

t.)

0.3

0.3

0.75

0.75

1.25

1.25

2.5

2.5

4.0

4.0

Port

ed B

ox V

ol. (

cu. f

t.)

0.62

50.

625

1.0

1.0

2.0

2.0

2.5

2.5

4.0

4.0

Spea

ker

Dis

. (cu

. ft.)

0.05

0.05

0.06

0.06

0.09

0.09

0.11

30.

113

0.19

0.19

Mou

ntin

g D

ia. (

in.)

71 ⁄16

71 ⁄16

95 ⁄32

95 ⁄32

1111

1414

1619

⁄3216

19⁄32

Mou

ntin

g D

epth

(in.

)313

⁄16313

⁄1641 ⁄2

41 ⁄253 ⁄8

53 ⁄871 ⁄8

71 ⁄881 ⁄2

81 ⁄2

INSTALLATION

® ®

LIMITED WARRANTY INFORMATION

Rockford Corporation offers a limited warranty on Rockford Fosgate products on thefollowing terms:

• Length of Warranty1 year on speakers 30 days on speaker B-stock (receipt required)3 years on electronics 90 days on electronic B-stock (receipt required)2 years on source units

• What is CoveredThis warranty applies only to Rockford Fosgate products sold to consumers byAuthorized Rockford Fosgate Dealers in the United States of America or itspossessions. Product purchased by consumers from an Authorized RockfordFosgate Dealer in another country are covered only by that country’s Distributorand not by Rockford Corporation.

• Who is CoveredThis warranty covers only the original purchaser of Rockford product purchasedfrom an Authorized Rockford Fosgate Dealer in the United States. In order toreceive service, the purchaser must provide Rockford with a copy of the receiptstating the customer name, dealer name, product purchased and date of purchase.

• Products found to be defective during the warranty period will be repaired orreplaced (with a product deemed to be equivalent) at Rockford's discretion.

• What is Not Covered1. Damage caused by accident, abuse, improper operations, water, theft2. Any cost or expense related to the removal or reinstallation of product3. Service performed by anyone other than Rockford or an Authorized Rockford

Fosgate Service Center4. Any product which has had the serial number defaced, altered, or removed5. Subsequent damage to other components6. Any product purchased outside the U.S.7. Any product not purchased from an Authorized Rockford Fosgate Dealer

• Limit on Implied WarrantiesAny implied warranties including warranties of fitness for use and merchantabilityare limited in duration to the period of the express warranty set forth above. Somestates do not allow limitations on the length of an implied warranty, so thislimitation may not apply. No person is authorized to assume for Rockford Fosgateany other liability in connection with the sale of the product.

• How to Obtain ServicePlease call 1-800-669-9899 for Rockford Customer Service. You must obtain anRA# (Return Authorization number) to return any product to Rockford Fosgate. Youare responsible for shipment of product to Rockford.

Ship to: SpeakersRockford Acoustic Design(Receiving-speakers)609 Myrtle N.W.Grand Rapids, MI 49504RA#:_________________

Ship to: ElectronicsRockford CorporationWarranty Repair Department2055 E. 5th StreetTempe, AZ 85281RA#:_________________

– 8 –

INT E RN

AT ION

AL IN

FORM

ATION

–9 –

LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DEINSTALACÍON DEL PRODUCTO.

Los terminales positivo y negativo de entrada están ubicados uno encada extremo de la carcasa. Este montaje separado previene deposibles cortocircuitos de la señal a altos niveles de volumen. Elterminal positivo está marcado con un punto en la carcasa. Un puntorojo indica que la impedancia del altavoz es de 8 ohmios, y un puntovioleta que es de 4 ohmios.

INTRODUCCÍON

Los woofers RF Punch XLC son una gama completa de drivers de bajafrecuéncia que comprenden diámetros de 8" a 15". Los Woofers RFPunch XLC fueron diseñados para su utilización en caja cerrada obass-reflex mediana. Diseñada para ofrecer la máxima calidad, losWoofers RF ofrecen al entusiasta principiante en sistemas de caraudio, la oportunidad para disfrutar de un bajo sólido en las bajasfrecuéncias. Nuestros ingenieros han seleccionado materiales ytécnicas para la construcción de nuestros altavoces con el objetivode ofrecer características y confianza comparable a otros altavocesvendidos much más caros.

TERMINALES DE ENTRADA

– 10 –

Para un buen funcionamiento las paredes del recinto han de serrigidas y sin flexión a altas presiones de aire. Recomendamos usar unespesor de 1.9 cm de conglomerado de alta densidad o fibra demedia densidad. Si el recinto es muy grande es necessario reforzarlointernamente. Las juntas deben ser encoladas y aseguradas contornillos o grapas. Internamente las juntas deben ser selladas consilicona para prevenir las fugas de aire. La cola para madera es lamejor opción. Debido a la porosidad del conglomerado de altadensidad y la fibra es recomendable sellar exteriormente la caja conpoliuretano.

CONSTRUCCION DE UN RECINTO

CALCULO DEL VOLUMEN

Para calcular el volumen sólo se han de medir las dimensiones encentimetros y aplicar la fórmula:

Volumen dula caja =

Si dos caras opuestas son de diferente tamaño, súmelas y divida eltotal por dos para obtener el promedio. Usando esta técnica seahorrara el cálculo por secciones. El espesor del material con que estáconstruida la caja reduce el volumen interno, de manera quer ha derestarse de las dimensiones exteriores para determinar el volumeninterior. La cantidad de aire que ocupa cada modelo viene especificadoen la hoja de caracteristicas y también debe sustraerse para obtenerel volumen neto interior.

1000

Alto x Ancho x Profundidad

(en litros)

ESPA

ÑO

L

– 11 –

VEUILLEZ LIRE LES INSTRUCTIONS SUIVANTES POUR L'INSTALLATIONDE CE PRODUIT.

Les bornes positives et négatives sont fixées de part et d'autre dusaladier. Cette séparation permet d'empêcher les courts-circuits entreles fils lors des reproductions sonores élevées. La borne positive estrepérée par un petit point de couleur sur le saladier. Un point rougeest utilisé pour les haut-parleurs de 8Ω, un point violet pour les haut-parleurs de 4Ω.

INTRODUCTION

Les woofers RF Punch XLC sont une gamme complète de haut-parleurs de graves allant de 20 à 46 cm et disponibles en 4Ω ou 8Ω.Les woofer RF Punch XLC ont été conçus pour être utilisé depréférence en enceintes closes.

En utilisant les techniques et les matériaux de construction les plusrécents, nous sommes parvenus à construire un haut-parleurfournissant un rendement élevé dans les graves tout en requérant unvolume opérationnel minimum.

BORNIERS

– 12 –

Pour fonctionner convenablement les parois du caisson doivent êtrerigides lorsqu'elles sont soumises aux hautes pressions dues aufonctionnement du haut-parleur. Nous vous recommandons d'utiliserdes panneaux de bois aggloméré à haute ou moyenne densité departicules de type “MDF”. Ces panneaux sont disponibles dans laplupart des magasins de bricolage. Pour un caisson de grand volumeil est recommandé de placer des renforts à l'intérieur du caisson. Lesdifférents côtés devront être collés (colle à bois) et vissés (ouéventuellement cloués). Il est recommandé de mettre un joint desilicone dans les arêtes internes du caisson afin d'éviter les fuitesd'air. Du fait de la porosité des matériaux que nous vous conseillonsil est préférable de recouvrir l'extérieur du caisson avec dupolyuréthane.

CONSTRUIRE UN CAISSON

CALCUL DU VOLUME

On calcule le volume en mesurant la dimension de chaque côté et enutilisant la formule suivante:

Volume ducaisson = (Litres)

Si les due côtés qui se font face n'ont pas la même longueur,additionnez les et divisez le résultat par deux pour obtenir lamoyenne des deux longueurs. Utilisez le nombre ainsi obtenu dansla formule pour déterminer le litrage. Cette méthode permet d'obtenirle volume du caisson sans devoir faire de calculs compliqués desection de volume. L'épaisseur du matériau dont est fait le caissonréduit le volume interne de celui-ci. Lorsqu'on mesure les côtés ducaisson il ne faut donc pas oublier d'oter des mesures l'epaisseur dumatériau. Le haut-parleur lui-même diminue le volume interne ducaisson. Le volume d'air déplacé par chaque modèle de haut-parleurest repris dans les spécifications techniques et doit également êtresoustrait du volume total.

1000

Hauteur (cm) x Longueur (cm) x Largeur (cm)

FR

AN

CA

IS

– 13 –

ANSCHLUβTERMINALS

BITTE LESEN SIE DIESE GEBRAUCHSANLEITUNG ZUERST SORGFÄLTIGDURCH. DAS KANN SIE VOR FALSCHEM EINSATZ, AUSFALLEN ODERSOGAR BESCHÄDIGUNG DES PRODUKTES ODER IHRES FAHRZEUGESSCHÜTZEN.

EINLEITUNG

Die RF-Punch XLC Woofer sind eine komplette Produktlinie von Tief-Frequenzlautsprechern mit Durchmesser von 20 cm bis zu 46 cm,erhältlich in der Impendanz 4 - und 8 Ohm (Die RF Punch XLCWoofer wurden vorwiegend fur den Einsatz in geschlossenen Gehäusekonstruiert). Durch die Verwendung neuester Materialien undProduktionstechniken können wir Ihnen heute einen Lautsprechervorstellen, der hohe Lautstärken und tiefe Frequenzen selbst in sehrkleinen Volumen reproduzieren kann.

Die Anschluβterminals wurden auf jeder Seite des Lautsprecherkorbespositioniert um eventuelle Kurzschlüsse auch bei hoher Leistungauszuschlieβen (Das Positiv-Terminal ist durch eine Farbmarkierunggekenzeichnet). Eine rote Farbamrkierung befindet sich immer beieinem Lautsprecher mit einer Impedanz von 8 Ohm, eine violetteFarbmarkierung zeichnet die Lautsprecher mit der Impedanz 4 Ohm.

– 14 –

DEU

TSCH

Um das Gehäuse so präzise wie möglich zu bauen, sollten dieGehäusewände sehr steif und luftundurchlässig sein, um dementsehenden Luftdruck des Lautsprechers standhalten zu können.Wir empfehlen 1,9 cm mittelverdichtete Faserplatte (MDF), die inden meisten Baumärkten angeboten wird. Bei einem gröβerenGehäuse sollten Sie Versteifungen durch Holzbalken montieren.Diese sollten – wie auch das gesamte Gehäuse – mit Holzleimgeklebt und verschraubt oder vernagelt sein. Um eine höhere Dichtezu erreichen, empfiehlt es sich, die Kanten und Verschraubungenmit Silikon abzudichten und das Gehäuse von innen mit einerHohlraumversiegelung zu behandeln.

DER GEHÄUSE BAU

VOLUMEN-BERECHNUNG

Zur Volumen-Berechung benötigen sie die genauen Maβe undDimensionen in Zentimetern.

Gehäuse-Volumen =

Sollten zwei gegenüberliegende Seiten ungleich lang sein, so könnensie die Maβe zusammen rechnen und durch zwei dividieren um denDurchschnitt zu erhalten. Dies macht Ihnen die Berechnung leichterund Sie müssen das Gehäuse nicht in Sektionen berechnen, die Siedanach wieder mühselig zusammen zählen müssen. Die Materialstärkebeeinfluβt natürlich auch das Innen-Volumen, so muss für einepräzise Berechnung die Materialstärke von Auβen-Volumenabgezogen werden. Der Lautsprecher verringert ebenfalls das Innen-Volumen, auch er sollte natürlich heraus gerechnet werden. JedesLautsprecher-Volumen ist unter “Specifications” genau aufgelistet.

1000

Höhe (cm) x Breite (cm) x Tiefe (cm)

(Kubik Liter)

– 15 –

LEGGERE CON ATTENZIONE LE SEGUENTI ISTRUZIONI PRIMADELL'INSTALLAZIONE DEL PRODOTTO.

I connettori di ingresso positivi e negativi sono montati sul cestello inposizioni speculari. Il montaggio separato impedisce al segnalemusicale di cortocircuitarsi ad altissimi livelli di volume. (Il terminaledi ingresso é indicato da una marcatura colorata sul cestello.) Uncontrassengno rosso indica che l'impedenza dell'altoparlante é 8ohm, il contrassegno viola é impiegato per i 4 ohm.

INTRODUZIONE

I woofer RF Punch XLC sono una linea completa di altoparlanti perbasse frequenze con diametri che vanno da 20 a 46 cm e disponibilisia a 4 che a 8 ohm. (I woofer RF Punch XLC sono progettati per ilfunzionamento principale in cassa chiusa.). Impiegando le piúaggiomate tecnologie e materiali, siamo in grado di offrire altoparlantiche possono riprodurre un'elevata pressione sonora alle bassefrequenze mantenendo i volumi di impiego assolutamente ridotti.

CONNESSIONI DI INGRESSO

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Per ottenere le prestazioni massime, le pareti della cassa devonoessere rigide e non flettere sotto la sollecitaxione della elevatapressione generata dal woofer. Noi raccomandiamo l'impiego diMDF con uno spessore minimo di 19 mm, materiale facilmentereperibile in tutte le falegnamerle. Per casse di dimensioni moltograndi é indispensabile prevedere dei rinforzi interni. Le giunturedevono essere incollate e fissate con viti o chiodi in abbondanza.Intermanmente le giunture devono essere siliconate per impediretrafilati d'aria. Anche la colla da legno funziona bene. Essendo ilMDF un materiale poroso si consiglia di sigillare l'esterno conmateriali poliuretanici.

COSTRUIRE UNA CASSA

CALCOLO DEL VOLUME

Calcolare il volume é essenzialmente solo un problema di misurazionedelle dimensioni in centimetri della cassa e di applicazione dellaformula:

Volume dellacassa = (litri) 1000

Alteza x Larghezza x Profonditá

Se due pareti parallele sono di dimensioni diverse (prisma),semplicemente sommatele e dividete il risulto per due. Impiegandoil risultato ottenuto potete calcolare il volume senza dividere la cassai sezioni. Lo spessore del legno riduce il volume interno, per cui énecessario sottrario dalle dimensioni esterne. Anche il volumedell'altoparlante stesso riduce il volume della cassa e deve esseresottratto. Il volume che ciascun altoparlante contribuisce a toglieredalla cassa é indicato nelle tabelle con le specifiche.

ITALIA

NO

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NOTES

NOTES

05/98LIT10191

Rockford FosgateRockford Corporation

546 South Rockford DriveTempe, Arizona 85281 U.S.A.

In U.S.A., (602) 967-3565In Europe, Fax (49) 8503-934014In Japan, Fax (81) 559-79-1265

www.rockfordfosgate.com

MADE IN THE USAThis product is designed, developed and assembled in the USA by a dedicated

group of American workers. The majority of the components used in theconstruction of this product are produced by American companies. However, due

to the global nature of their manufacturing facilities and the loudspeaker partsindustry in general, some parts may be manufactured in other countries.