Rockford Fosgate RFA-408 Bedienungsanleitung



OWNER'SMANUAL

AUDIOPHILE WOOFERS

RFA-408 RFA-808

RFA-410 RFA-810

RFA-412 RFA-812

Dear Customer,

Congratulations on your purchase of America’s finest brand of car audio compo-

nents. At Rockford Fosgate we are committed to musical reproduction at its best,

andwearepleasedyouchoseourproduct. Throughyearsofengineeringexpertise,

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

specializedtrainingthroughRockfordTechnicalTrainingInstitute(RTTI). Please

read your warranty and retain your receipt and original carton for possible future

use.

ToaddthefinishingtouchtoyournewRockfordFosgateimageorderyourRockford

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,

pleasecall1-800-669-9899orFAX1-602-966-3983intheU.S.ForCanada,call

KorbonTradingat905-567-1920.ForinternationalordersFAX001-1-602-967-

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

SOUNDSYSTEMSMAYPRODUCESOUNDPRESSURELEVELSWELLOVER

130dB. USE COMMON SENSE AND PRACTICE SAFE SOUND.

If, after reading your manual, you still have questions regarding this prod-

uct, we recommend that you see your Rockford Fosgate dealer. If you need

futher 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 be sure

torecorditinthespaceprovidedbelowasyourpermanentrecord. Thiswill

serve as verification of your factory warranty and could become useful in

recovering your product if ever stolen.

Serial Number: _________________________________________

Model Number:___________________________________

TABLE OF CONTENTS

Punch Audiophile Woofer Contents ..................................................1

Introduction ......................................................................................1

Design Features.................................................................................1

Cone ...........................................................................................1

Vented Pole Piece .......................................................................1

Suspension ..................................................................................1

Voice Coil ...................................................................................2

Powder Coated Basket.................................................................2

Epoxy Filled Inverted Dust Caps ..................................................2

Dual Input Terminals...................................................................2

Low Frequency Speaker Systems .......................................................2

Using the Punch Audiophile Woofers ...............................................3

Calculating Load Impedance.............................................................3

Calculating Volume ..........................................................................4

Building An Enclosure.......................................................................4

Specifications....................................................................................6

Warranty Information........................................................................7

– 1 –

PUNCH AUDIOPHILE WOOFER CONTENTS

Punch Audiophile Woofer

Punch Audiophile Woofer manual

Kevlar® is a registered trademark of E.I. DuPont de Nemours & Co., Inc.

INTRODUCTION

This manual provides information on the construction, installation

andoperationofthePunchAudiophileWoofers.Wesuggestyousave

this manual for future reference.

ThePunchAudiophilewoofersareafulllineoflowfrequencydrivers

in8",10",and12"sizes;in4or8ohmimpedance.Theyaredesigned

for use primarily in small, sealed enclosures. By utilizing the latest

materialsandconstructiontechniques,weare able to offer a speaker

with good, low frequency response while requiring a minimum of

operating space.

DESIGN FEATURES

Cone – The cone material used is spruce pulp paper reinforced with

Kevlar® fiber (8" and 10" only). This provides the necessary combi-

nationofweightandstrengthandallowshighlevelsofoutputwithout

cone break up. The cone is treated with a water resistant Polyvinyl

AcetateEmulsion(PVA)whichincreasestheconerigidityandlowers

distortion.

Vented Pole Piece – To allow operation at reasonably high power

levels,ventilationisneeded.Thisisdonethroughtheuseofa vented

pole piece. The venting allows fresh air to circulate and remove the

built up heat from the voice coil assembly.

Suspension – The suspension holds the cone to the basket and

supports the voice coil in the magnetic gap. The suspension should

allow the cone to move in and out freely but not allow side to side

motion. The Punch Audiophile woofers all use a Nitrile rubber

surround for the front and a flat spider design for the rear. This

combination takes full advantage of the Kevlar® cone's stiffness

allowing clean, uncolored reproduction.

– 2 –

Voice Coil – The construction of the voice coil is designed to

maximize the speaker's power handling. The wire used is high

temperature copper, wound in multiple layers on a black, anodized

aluminum former. The wire will withstand high temperatures while

the former conducts heat away from the coil.

Powder Coated Basket – The stamped steel baskets of the Punch

Audiophile woofers are finished with a powder coat process. This

good looking finish damps the basket resonance, preventing basket

vibration from coloring the sound. Unrelated to the sonic perfor-

mance of the speakers, but equally important, the powder coating

used is environmentally friendly since no toxic chemicals are re-

leased into the atmosphere during the process.

Epoxy Filled Inverted Dust Caps – The inverted dust cap provides a

flatter power response and rigidity to the cone. Epoxy filling adds

mass, to ensure the high performance in small, sealed boxes.

Dual Input Terminals – To facilitate hook-up in multiple driver

configurations,eachpositiveandnegativeterminalhastwoconnect-

ing lugs. The positive terminal is identified by a dot which also

indicates the speaker's impedance. A red dot is used on an 8Ω

speaker, a violet dot on a 4Ωspeaker.

LOW FREQUENCY SPEAKER SYSTEMS

The Punch Audiophile woofers require an enclosure to achieve

optimumresults.Theenclosureallowsthespeakertooperateatlower

frequencieswithimprovedpowerhandling.Thetwomostcommonly

usedtypesoflowfrequencyspeakersystemsareacousticsuspension

and bass reflex. The acoustic suspension enclosure, commonly

referred to as a sealed box, relies upon the changing air pressure in a

tightly sealed chamber of its operation. The bass reflex, commonly

referred to as a ported enclosure, uses a vent inserted into the box

which takes over for the speaker at a desired frequency which is

determinedbytheinternalvolumeoftheenclosureandthesizeofthe

ventused.ThePunchAudiophilewooferswillyieldoptimumperfor-

mance in a small, sealed enclosure.

– 3 –

USING THE PUNCH AUDIOPHILE WOOFERS

Speakers are built in different sizes to optimize their performance in

different frequency bands. Crossovers are used to route the different

frequency bands for each appropriate speaker. There are two opera-

tional types of crossovers, active and passive. An active crossover is

anelectronicfilterwhichisplaced beforetheamplifierandseparates

thesignalfedtodifferentamplifiersinthesystem.Apassivecrossover

is positioned after the amplifier and separates the signal fed to each

speaker in the system. Active crossovers offer the accuracy and

flexibilityneeded for asophisticated system and are usedin complex

multiple amp designs. Passive crossovers (capacitors and inductors)

allowtheuseofmultiplespeakersinasimplesystemwhichcaneasily

be expanded over time. We recommend using a 6dB per octave,

100Hz low pass crossover for the Punch Audiophile Woofers when

used with a passive system.

To customize the installation, try adjusting the crossover point one

octave up or down to optimize the system staging.

The Punch Audiophile Woofers are used for the sub-bass region,

thosefrequenciesbelow100Hz.Thisisthefoundationforthemusic

and the frequency range you feel. Before selecting the passive

crossover it is necessary to calculate the load impedance of the

speaker system. In a series circuit the impedance is determined by

the formula:

RT= R1+ R2+ R3+ etc.

In a parallel circuit the impedance is determined by the formula:

Where RTis the total speaker load and R1, R2, etc. represent each

speaker in the system.

The crossover is connected in line to the positive terminal of the

speakersystem.CrossoversareavailablefromAuthorizedRockford

Fosgate Dealers.

1 1 1 1 1

=++++etc.

RTR1R2R3R4

CALCULATING LOAD IMPEDANCE

– 4 –

BUILDING ANENCLOSURE

To work properly, the walls of the enclosure must be rigid and not

flexwhensubjectedtothehighpressuresgeneratedbythespeaker's

operation. We recommend using 3/4" thick high density particle

board or medium density fiberboard (MDF), which are available at

most building supply stores. For a large box, internal bracing is

needed for reinforcement. The joints should be glued and secured

witheithernailsorscrews;internallythejointsshouldbesealedwith

silicon to prevent air leaking. Wood glue works best. Because the

high density particle board and MDF are porous materials, it is

suggested to seal the outside enclosure walls with polyurethane.

Calculating volume is merely a matter of measuring the dimensions

ininches andusing theformula: Volume= Heightx Widthx Depth.

The result is in cubic inches. Convert this to cubic feet by dividing

by 1,728 (the number of cubic inches in a cubic foot). If two facing

sides are of uneven length, add them together and divide by two to

taketheaverage.Usingthisnumberwillgiveyouthevolumewithout

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 dimen-

sions 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.

CALCULATING VOLUME

– 5 –

Cut out two pieces of each panel using 3/4" MDF.

Model # Panel “A” Panel “B” Panel “C” Volume

RFA-408/808 10.5" x 16.5" 4.75" x 16.5" 4.75" x 9" .33 cu. ft.

RFA-410/810 12.75" x 19.75" 6.25" x 19.75" 6.25" x 11.25" .66 cu. ft.

RFA-412/812 13.5" x 20.5" 7.75 x 20.5" 7.75" x 12" .88 cu. ft.

In Conclusion

Special care has been taken to ensure your satisfaction with the

Punch Audiophile Woofers. The materials and workmanship have

beencarefullyselectedtoguaranteeperformanceequaltotheneeds

of the most demanding conditions. If you have any further questions

oradvancedsystemneeds,yourAuthorizedRockfordFosgateDealer

will be happy to assist you.

SPECIFICATIONS

– 6 –

Model RFA-408 RFA-808 RFA-410 RFA-810 RFA-412 RFA-812

Nom. Imped. 4 8 4 8 4 8

FS (Hz) 29 31 23 25 21 22

RE (Ohm) 3.5 7 3.5 7 3.5 7

LE (mH) 0.59 1 .86 1.3 1 1.6

QMS 2.08 2.19 1.94 2.03 2.2 2.8

QES 0.53 0.69 0.47 0.58 0.45 0.58

QTS 0.42 0.52 0.38 0.45 0.38 0.48

VAS (cu.ft) 2.154 2.154 3.5 3.5 9.128 9.128

VAS (liter) 61 61 127 127 260 260

Power (Watts RMS) 150 150 150 150 250 250

SPL (dB @ 1w/1m) 86.6 86.4 87 86.5 89.4 89

X-MAX (inches) 0.25 0.25 0.34 0.34 0.37 0.37

X-MAX (mm) 6.3 6.3 8.5 8.5 9.3 9.3

Rec. Box Vol. (cu. ft.) 0.33 0.33 0.66 0.66 0.88 0.88

Spk. Dis. Outside (cu. ft.) 0.04 0.04 0.07 0.07 0.11 0.11

Spk. Dis. Outside (liters) 1.13 1.13 1.79 1.79 3.04 3.04

Spk. Dis. Inside (cu. ft.) 0.05 0.05 0.08 0.08 0.12 0.12

Spk. Dis Inside (liters) 1.35 1.35 2.24 2.24 3.52 3.52

Mntg. Dia. (in.) 7-3/8 7-3/8 9-3/8 9-3/8 11 11

Mntg. Dia. (mm) 187.4 187.4 238.1 238.1 279.4 279.4

Mntg. Depth (in.) 3-5/8 3-5/8 4-1/2 4-1/2 5-1/8 5-1/8

Mnt.g. Depth (mm) 92.1 92.1 114.3 114.3 128.6 128.6

Rockford Fosgate warrants all loudspeakers to the original purchaser for a period

of two (2) years parts and labor, providing the product was purchased from an

Authorized Rockford Fosgate Dealer. Speakers found to be defective during the

warranty period will be repaired or replaced (with a product deemed to be

equivalent) at Rockford Fosgate’s discretion.

Repaired or replaced speakers will

cover the balance of the original warranty period only.

Warranty appliesonly to

original purchaser and is non-transferable. Warranty does not cover abuse or

installation error. If a determination is made that the product has been abused or

is out of the warranty period, it will be repaired, exchanged, and billed. Parts not

coveredunderwarrantywillberepairedorreplacedandbilled.Forspeakerboxes,

please return the speaker only. Serial number must be intact to obtain warranty.

Speakers must be returned prepaid to Grand Rapids, Michigan.

GENERAL

Electronicsandspeakerwarrantiesdonotcoveranyappearanceitem,anycostor

expenserelatedtotheremovalorreinstallationoftheproduct,anyaccessoryused

inconjunction withtheproduct, damageto theproduct resultingfromalteration,

accident,misuse orabuse,or improperinstallation. Thiswarranty doesnotapply

ifthepartsorlabor,whichwouldotherwisebeprovidedwithoutchargeunderthis

warranty, are obtained from any source other than Rockford Fosgate or an

Authorized Rockford Fosgate Service Center.

The warranty is the only express warranty and does not create any implied

warranties. Rockford Fosgate limits its obligations under any implied warranties

understatelawstoaperiodnottoexceedthewrittenwarrantyperiod.Somestates

do not allow limitation on how long an implied warranty lasts, so the above

limitationmaynotapply.ThiswarrantyappliesonlytoproductssoldintheUnited

States of America or its possessions. For warranty outside the U.S.A., please

contact the nearest Authorized Rockford Fosgate Dealer. This warranty gives the

consumerspecificlegalrights,andtheconsumermayhaveotherrightswhichvary

from state to state.

Adefective productmustbe shippedprepaid tothe AuthorizedRockfordFosgate

Dealer from which the consumer purchased the product or to the address below,

in the original factory carton or equivalent. Any shipping loss or damage will be

borne by the consumer or the consumer’s shipper. A consumer returning a

product to the factory must call (800) 669-9899 for a Return Authorization

Number. All shipments shall be clearly marked with the Return Authorization

Number on the outside of the shipping carton.

Rockford Corporation

609 Myrtle N.W.

Grand Rapids, MI 49504 (Receiving-speakers)

WARRANTY INFORMATION

Dieses Handbuch passt für folgende Modelle

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