Rockford Fosgate RFP2408 User manual

® ®
car audio
fanatics
for
punc
h
®
RFP2408/2808
RFP2410/2810
RFP2412/2812
RFP2415/2815
RFP2418/2818

Dear Customer,
Congratulationsonyourpurchaseoftheworld'sfinestbrandofcaraudiospeakers. At
Rockford Fosgate we are fanatics about musical reproduction at its best, and we are
pleasedyouchoseourproduct.Throughyearsofengineeringexpertise,handcraftsman-
ship 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.
Greatproductandcompetentinstallationsare onlyapieceofthepuzzle whenitcomes
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
wearables,which include everything from T-shirtsand jackets to hats andsunglasses.
TogetafreebrochureonRockfordFosgateproductsandRockfordwearables,intheU.S.
call 602-967-3565 or FAX [phone]. For all other countries, call +001-602-
967-3565 or FAX [phone].
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
verificationofyourfactorywarrantyandmaybecomeusefulinrecoveringyour
speaker 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 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.
PRACTICE SAFE SOUND™
CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER
100dBMAY 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 .............................................................................................1
RF Punch XLC Woofer Contents...............................................................1
Technical Design Features .......................................................................1
Stamped Basket .................................................................................. 1
PVA Cone ..........................................................................................1
Inverted Dust Cap ..............................................................................1
Aluminum Voice Coil Former............................................................. 2
Progressive Dual Laminated Spider ....................................................2
Dual Laminated Foam Surrounds .......................................................2
Hyper-Extended Pole Piece ................................................................2
Vented Bumped Back Plate ................................................................2
Installation ...............................................................................................3
Recommended Enclosures.................................................................. 3
Building An Enclosure ........................................................................5
Calculating Volume............................................................................5
Subwoofer Crossovers ........................................................................ 5
Wiring Configurations ........................................................................ 6
Specifications........................................................................................... 7
Warranty Information............................................................................... 8
International Information..........................................................................9
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
tothe InstallationSection ofthismanualorrefertotheiconlistedbelow.
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
newways toimproveour product,thisinformation issubject to change
without notice.
GETTING STARTED
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Sections marked
INSTALLATION
include “slam dunk”
assembly and wiring
directions

–1 –
INTRODUCTION
TheRFPunchXLCWoofersareafulllineoflowfrequencydriverssized
from8"to18"andareavailablein4or8ohmimpedance.TheRFPunch
XLCwoofersweredesignedforuseprimarilyinsmall,sealedorported
enclosures. By utilizing the latest materials and construction tech-
niques, we are able to offer a speaker with high output at low
frequencies while requiring a minimum of operating space.
RF PUNCH WOOFER CONTENTS
RF Punch XLC Woofer
Installation & Owner's Manual
4 Foam Gaskets
TECHNICAL DESIGN FEATURES
◆Stamped Basket
The RF Punch XLC Woofers use a stamped Cold Rolled Steel basket
which is rigid and lightweight. The basket is finished in a corrosive
resistant powder coated process used in many automotive
applications.
THE RESULT: A lightweight and rigid woofer
◆PVA Cone
The cone material used is spruce pulp paper. This provides the
necessary combination of weight and strength and allows high levels
of output without cone break up. The cone is treated with a water
resistantPolyVinyl Acetate(PVA) Emulsionwhich increasesthe cone
rigidity 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 rigidity
and improve the power handling by forcing more air through the
voice coil.
THE RESULT: Increases cone rigidity, smooths frequency response
andpreventsyourfriendsfromfeelingobligatedtoinvertthemforyou.

–2 –
◆Aluminum Voice Coil Former
Thevoicecoilformerisblack,anodizedaluminumforhighlyefficient
thermal transfer. This allows winding high temperature copper wire
in multiple layers for improved efficiency.
THERESULT:Improvespowerhandlingbyefficientlydissipatingheat
◆Flat Progressive Dual Laminated Spider
A flat progressive dual laminated spider is employed to provide
strongersuspensionfor thewoofer.Asecondaryspiderisfusedtothe
primary 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: Strengthenssuspensionfor higherexcursioncapability
◆Dual Laminated Foam Surrounds
The RF Punch XLC Woofers employ a dual laminated foam surround
for the front of the woofer's suspension. Dual lamination improves
reliability 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 magnetic
field for the operation of the woofer. This lowers distortion and
provides the woofer with better low frequency response.
THE RESULT: Lowers distortion and provides better low frequency
response
◆Vented Bumped Back Plate
The back plate has been stepped deeper to allow the woofer more
excursionwithoutbottomingout.Thisenablesthespeakertobeused
in a smaller enclosure. Additionally, the back plate is vented with a
radiused 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 Enclosures
Punch 8"
Recommended Sealed .30ft3(8.50L)
Punch 10"
Recommended Sealed .75ft3(21.24L)
Punch 12"
Recommended Sealed 1.25ft3(35.40L)
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Recommended Ported .625ft3(17.70L)
Fb = 40 Hz
Pd = 2.5" (6.35cm)
Pl = 11.25" (28.57cm)
Recommended Ported 1.0 ft3(28.32L)
Fb = 35 Hz
Pd = 3" (7.62cm)
Pl = 13.25" (33.65cm)
Recommended Ported 2.0 ft3(56.63L)
Fb=35 Hz
Pd=4" (10.16cm)
Pl=10.75" (27.30cm)

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Recommended Sealed 4.0ft3(113.27L)
Punch 15"
Recommended Sealed 2.5ft3(70.79L)
Punch 18"
Recommended Enclosures
Fb = 35 Hz
Pd = 4" (10.16cm)
Pl = 8" (20.32cm)
Recommended Ported 2.5ft3(70.79L)
Recommended Ported 4.0ft3(113.27L)
Fb=30 Hz
Pd=2 x 4" (2 x 10.16cm)
Pl=14.5" (36.83cm)

Building an Enclosure
Toworkproperly,thewallsoftheenclosuremustberigidandnotflex
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 enclo-
sureshould begluedtogether andsecuredwith nailsorscrews. MDF
is porous; therefore, it is suggested to also seal the outside walls with
polyurethane.
Calculating Volume
Calculating volume is merely a matter of measuring the dimensions
in inches and using the formula:
1728"
Height x Width x Depth
Box Volume =
(cubic feet)
Iftwofacingsidesareofunevenlength,addthemtogetheranddivide
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.
Subwoofer Crossovers
There are two operational types of crossovers, passive and active.
Passivecrossovers(coilsorinductors)areplacedonthespeakerleads
between 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 an
active 80-100Hz low-pass crossover at 12dB/octave.
– 5 –

– 6 –
Wiring Configurations
Three configurations for connecting speakers to an amplifier
are 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 more
speakers wired with the common terminals connected across
eachother.ASeries-Parallelconfigurationisacombinationof
both methods. Determine which method will be compatible
with your amplifier.
RT= R1+ R2+ R3+ etc. 1 1 1 1 1
=++++etc.
RTR1R2R3R4
Series Wiring Parallel Wiring
•RTindicates 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
Series-Parallel Wiring
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SPECIFICATIONS
Model RFP2408 RFP2808 RFP2410 RFP2810 RFP2412 RFP2812 RFP2415 RFP2815 RFP2418 RFP2818
Nominal Impedance 4 8 4 848 4848
FS (Hz) 35 37 30 32 28 30 23 25 22 24
RE (Ohm) 3.7 7.3 3.7 7.3 3.7 7.3 3.7 7.3 3.9 7.8
LE (mH) 3.3 5.2 3.3 5.2 3.3 5.2 3.3 5.2 3.8 6.7
QMS 6.18 6.63 5.38 5.23 6.20 5.91 5.51 5.50 5.25 5.70
QES 0.39 0.50 0.39 0.47 0.52 0.71 0.42 0.55 0.49 0.575
QTS 0.37 0.47 0.36 0.43 0.48 0.64 0.39 0.50 0.46 0.522
VAS (cu.ft.) 0.635 0.635 1.62 1.62 4.23 4.23 11.86 11.86 14.44 14.44
VAS (liter) 18 18 46 46 120 120 336 336 409 409
Power (Watts RMS) 200 200 200 200 200 200 200 200 250 250
Power (Watts Peak) 400 400 400 400 400 400 400 400 500 500
SPL (dB @ 1w/1m) 85 85 87 87 89 89 92 92 92 92
X-MAX (inches) 0.31 0.31 0.31 0.31 0.31 0.31 0.31 0.31 0.39 0.39
X-MAX (mm) 8 8 8 8 8 8 8 8 10 10
Sealed Box Vol. (cu. ft.) 0.3 0.3 0.75 0.75 1.25 1.25 2.5 2.5 4.0 4.0
Ported Box Vol. (cu. ft.) 0.625 0.625 1.0 1.0 2.0 2.0 2.5 2.5 4.0 4.0
Speaker Dis. (cu. ft.) 0.05 0.05 0.06 0.06 0.09 0.09 0.113 0.113 0.19 0.19
Mounting Dia. (in.) 7
1
⁄
16
7
1
⁄
16
9
5
⁄
32
9
5
⁄
32
11 11 14 14 16
19
⁄
32
16
19
⁄
32
Mounting Depth (in.) 3
13
⁄
16
3
13
⁄
16
4
1
⁄
2
4
1
⁄
2
5
3
⁄
8
5
3
⁄
8
7
1
⁄
8
7
1
⁄
8
8
1
⁄
2
8
1
⁄
2
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LIMITED WARRANTY INFORMATION
Rockford Corporation offers a limited warranty on Rockford Fosgate products on the
following terms:
•Length of Warranty
1 year on speakers 30 days on speaker B-stock (receipt required)
3 years on electronics 90daysonelectronicB-stock(receiptrequired)
2 years on source units
•What is Covered
This warranty applies only to Rockford Fosgate products sold to consumers by
Authorized Rockford Fosgate Dealers in the United States of America or its
possessions. Product purchased by consumers from an Authorized 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
statingthecustomername,dealername,productpurchasedanddateofpurchase.
•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
2. Any cost or expense related to the removal or reinstallation of product
3. Service performed by anyone other than Rockford or an Authorized 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 an Authorized Rockford Fosgate Dealer
•Limit on Implied Warranties
Anyimpliedwarrantiesincludingwarrantiesoffitnessforuseandmerchantability
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
limitationmay not apply. No personis authorized to assume forRockford Fosgate
any other liability in connection with the sale of the product.
•How to Obtain Service
Please call 1-800-669-9899 for Rockford Customer Service. You must obtain an
RA#(ReturnAuthorizationnumber)toreturnanyproducttoRockfordFosgate.You
are responsible for shipment of product to Rockford.
Ship to: Speakers
Rockford Acoustic Design
(Receiving-speakers)
609 Myrtle N.W.
Grand Rapids, MI 49504
RA#:_________________
Ship to: Electronics
Rockford Corporation
Warranty Repair Department
2055 E. 5th Street
Tempe, AZ 85281
RA#:_________________
– 8 –

INTERNATIONAL
INFORMATION
–9 –

LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DE
INSTALACÍON DEL PRODUCTO.
Los terminales positivo y negativo de entrada están ubicados uno en
cada extremo de la carcasa. Este montaje separado previene de
posibles cortocircuitos de la señal a altos niveles de volumen. El
terminalpositivoestámarcadocon un punto enlacarcasa.Unpunto
rojoindicaquelaimpedancia del altavozes de8 ohmios, yun punto
violeta que es de 4 ohmios.
INTRODUCCÍON
LoswoofersRFPunchXLC sonunagamacompletadedriversdebaja
frecuéncia que comprenden diámetros de 8" a 15". Los Woofers RF
Punch XLC fueron diseñados para su utilización en caja cerrada o
bass-reflex mediana. Diseñada para ofrecer la máxima calidad, los
Woofers RF ofrecen al entusiasta principiante en sistemas de car
audio, la oportunidad para disfrutar de un bajo sólido en las bajas
frecuéncias. Nuestros ingenieros han seleccionado materiales y
técnicas para la construcción de nuestros altavoces con el objetivo
de ofrecer características y confianza comparable a otros altavoces
vendidos much más caros.
TERMINALES DEENTRADA
– 10 –

Para un buen funcionamiento las paredes del recinto han de ser
rigidasysinflexiónaaltaspresionesdeaire.Recomendamosusarun
espesor de 1.9 cm de conglomerado de alta densidad o fibra de
mediadensidad.Sielrecintoesmuygrandeesnecessarioreforzarlo
internamente. Las juntas deben ser encoladas y aseguradas con
tornillos o grapas. Internamente las juntas deben ser selladas con
silicona para prevenir las fugas de aire. La cola para madera es la
mejor opción. Debido a la porosidad del conglomerado de alta
densidadylafibraesrecomendablesellarexteriormentelacajacon
poliuretano.
CONSTRUCCION DEUNRECINTO
CALCULO DEL VOLUMEN
Para calcular el volumen sólo se han de medir las dimensiones en
centimetros y aplicar la fórmula:
Volumen du
la caja =
Si dos caras opuestas son de diferente tamaño, súmelas y divida el
total por dos para obtener el promedio. Usando esta técnica se
ahorraraelcálculoporsecciones.Elespesordelmaterialconqueestá
construida la caja reduce el volumen interno, de manera quer ha de
restarse de las dimensiones exteriores para determinar el volumen
interior.Lacantidaddeairequeocupacadamodelovieneespecificado
en la hoja de caracteristicas y también debe sustraerse para obtener
el volumen neto interior.
1000
Alto x Ancho x Profundidad
(en litros)
E
SPAÑOL
– 11 –

VEUILLEZ LIRE LES INSTRUCTIONS SUIVANTES POUR L'INSTALLATION
DE CE PRODUIT.
Les bornes positives et négatives sont fixées de part et d'autre du
saladier.Cetteséparationpermetd'empêcherlescourts-circuitsentre
les fils lors des reproductions sonores élevées. La borne positive est
repérée par un petit point de couleur sur le saladier. Un point rouge
est 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 4Ωou 8Ω.
Les woofer RF Punch XLC ont été conçus pour être utilisé de
préférence en enceintes closes.
En utilisant les techniques et les matériaux de construction les plus
récents, nous sommes parvenus à construire un haut-parleur
fournissant un rendement élevé dans les graves tout en requérant un
volume opérationnel minimum.
BORNIERS
– 12 –

Pourfonctionnerconvenablementlesparoisducaissondoiventêtre
rigides lorsqu'elles sont soumises aux hautes pressions dues au
fonctionnementduhaut-parleur.Nousvousrecommandonsd'utiliser
des panneaux de bois aggloméré à haute ou moyenne densité de
particules de type “MDF”. Ces panneaux sont disponibles dans la
plupartdesmagasinsdebricolage.Pouruncaissondegrandvolume
ilestrecommandédeplacerdesrenfortsàl'intérieurducaisson.Les
différents côtés devront être collés (colle à bois) et vissés (ou
éventuellement cloués). Il est recommandé de mettre un joint de
silicone dans les arêtes internes du caisson afin d'éviter les fuites
d'air.Dufaitdelaporositédesmatériauxquenousvousconseillons
il est préférable de recouvrir l'extérieur du caisson avec du
polyuréthane.
CONSTRUIRE UNCAISSON
CALCUL DUVOLUME
Oncalculelevolumeenmesurantladimensiondechaquecôtéeten
utilisant la formule suivante:
Volume du
caisson =
(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 la
moyenne des deux longueurs. Utilisez le nombre ainsi obtenu dans
laformulepourdéterminerlelitrage.Cetteméthodepermetd'obtenir
le volume du caisson sans devoir faire de calculs compliqués de
section de volume. L'épaisseur du matériau dont est fait le caisson
réduit le volume interne de celui-ci. Lorsqu'on mesure les côtés du
caisson il ne faut donc pas oublier d'oter des mesures l'epaisseur du
matériau. Le haut-parleur lui-même diminue le volume interne du
caisson.Levolumed'airdéplacéparchaquemodèledehaut-parleur
est repris dans les spécifications techniques et doit également être
soustrait du volume total.
1000
Hauteur (cm) x Longueur (cm) x Largeur (cm)
F
RANCAIS
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ANSCHLUββ
ββ
βTERMINALS
BITTE LESEN SIE DIESE GEBRAUCHSANLEITUNG ZUERST SORGFÄLTIG
DURCH. DAS KANN SIE VOR FALSCHEM EINSATZ, AUSFALLEN ODER
SOGAR BESCHÄDIGUNG DES PRODUKTES ODER IHRES FAHRZEUGES
SCHÜTZEN.
EINLEITUNG
DieRF-PunchXLCWoofersindeinekompletteProduktlinievonTief-
Frequenzlautsprechern mit Durchmesser von 20 cm bis zu 46 cm,
erhältlich in der Impendanz 4 - und 8 Ohm (Die RF Punch XLC
WooferwurdenvorwiegendfurdenEinsatzingeschlossenenGehäuse
konstruiert). Durch die Verwendung neuester Materialien und
Produktionstechniken können wir Ihnen heute einen Lautsprecher
vorstellen, der hohe Lautstärken und tiefe Frequenzen selbst in sehr
kleinen Volumen reproduzieren kann.
DieAnschluβterminalswurdenaufjederSeitedesLautsprecherkorbes
positioniert um eventuelle Kurzschlüsse auch bei hoher Leistung
auszuschlieβen (Das Positiv-Terminal ist durch eine Farbmarkierung
gekenzeichnet). Eine rote Farbamrkierung befindet sich immer bei
einem Lautsprecher mit einer Impedanz von 8 Ohm, eine violette
FarbmarkierungzeichnetdieLautsprechermitderImpedanz4Ohm.
– 14 –

D
EUTSCH
Um das Gehäuse so präzise wie möglich zu bauen, sollten die
Gehäusewände sehr steif und luftundurchlässig sein, um dem
entsehenden Luftdruck des Lautsprechers standhalten zu können.
Wir empfehlen 1,9 cm mittelverdichtete Faserplatte (MDF), die in
den meisten Baumärkten angeboten wird. Bei einem gröβeren
Gehäuse sollten Sie Versteifungen durch Holzbalken montieren.
Diese sollten – wie auch das gesamte Gehäuse – mit Holzleim
geklebtundverschraubtodervernageltsein.UmeinehöhereDichte
zu erreichen, empfiehlt es sich, die Kanten und Verschraubungen
mit Silikon abzudichten und das Gehäuse von innen mit einer
Hohlraumversiegelung zu behandeln.
DER GEHÄUSE BAU
VOLUMEN-BERECHNUNG
Zur Volumen-Berechung benötigen sie die genauen Maβe und
Dimensionen in Zentimetern.
Gehäuse-
Volumen =
SolltenzweigegenüberliegendeSeitenungleichlangsein,sokönnen
sie die Maβe zusammen rechnen und durch zwei dividieren um den
Durchschnittzu erhalten.Diesmacht Ihnen dieBerechnungleichter
und Sie müssen das Gehäuse nicht in Sektionen berechnen, die Sie
danachwiedermühseligzusammenzählenmüssen.DieMaterialstärke
beeinfluβt natürlich auch das Innen-Volumen, so muss für eine
präzise Berechnung die Materialstärke von Auβen-Volumen
abgezogenwerden.DerLautsprecherverringert ebenfalls das Innen-
Volumen, auch er sollte natürlich heraus gerechnet werden. Jedes
Lautsprecher-Volumen ist unter “Specifications” genau aufgelistet.
1000
Höhe (cm) x Breite (cm) x Tiefe (cm)
(Kubik Liter)
– 15 –

LEGGERE CON ATTENZIONE LE SEGUENTI ISTRUZIONI PRIMA
DELL'INSTALLAZIONE DEL PRODOTTO.
Iconnettori di ingressopositivie negativisonomontati sulcestelloin
posizioni speculari. Il montaggio separato impedisce al segnale
musicaledicortocircuitarsiadaltissimilivellidivolume.(Ilterminale
di ingresso é indicato da una marcatura colorata sul cestello.) Un
contrassengno rosso indica che l'impedenza dell'altoparlante é 8
ohm, il contrassegno viola é impiegato per i 4 ohm.
INTRODUZIONE
I woofer RF Punch XLC sono una linea completa di altoparlanti per
bassefrequenze condiametri che vanno da 20 a 46cm edisponibili
sia a 4 che a 8 ohm. (I woofer RF Punch XLC sono progettati per il
funzionamento principale in cassa chiusa.). Impiegando le piú
aggiomatetecnologieemateriali,siamoingradodioffrirealtoparlanti
che possono riprodurre un'elevata pressione sonora alle basse
frequenze mantenendo i volumi di impiego assolutamente ridotti.
CONNESSIONI DI INGRESSO
– 16 –