Infinity Beta 8DVC Bruksanvisning

Infinity Subwoofer Beta 8DVC

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CAR AUDIO

Thank you for purchasing an Infinity Beta Eight.dvc

8" Dual Voice-Coil Subwoofer. You’ve selected a pre-

mium product that offers superior performance and

advanced materials, resulting from over 25 years of

loudspeaker design. This Infinity product is made

with our ongoing dedication to create the best con-

sumer audio products possible. As a result, you can

expect your new Beta Subwoofer to provide you with

many years of listening enjoyment.

Refer to Subwoofer Enclosure Trade-Offs (on the

inside pages) for help in selecting an enclosure type

and alignment. Also, review the wiring diagrams (on

the back page) on how to connect the subwoofer for

2-ohm, 8-ohm, and summed-mono applications.

Each Infinity Beta Eight.dvc 8" Dual Voice-Coil

Subwoofer is covered by our limited parts and labor

warranty (see the enclosed warranty card). Keep

your original dated bill of sale in case warranty ser-

vice is required.

IMPORTANT: Installation of automotive stereo

components can require extensive experience in

dealing with a variety of electrical, and

mechanical procedures, including subwoofer

box building. Although these instructions

explain how to install a Beta Subwoofer in a

general sense, they do not show the exact instal-

lation methods for your particular vehicle. If

you do not have the experience, do not attempt

the installation yourself; instead ask your

Authorized Infinity Car Audio Dealer about

professional installation options.

PRECAUTIONS

• Always wear protective eyewear when using tools.

• Turn off all audio systems and other electrical

devices before starting the installation.

• Disconnect the (–) negative lead from your vehi-

cle’s battery.

Eight.dvc 8" Subwoofer

I N S T R U C T I O N S

• Locate and note all fuel lines, hydraulic brake

lines, and electrical wiring. Use extreme caution

when cutting or drilling in and around these areas.

• Check clearances on both sides of a planned

mounting surface before drilling any holes or

installing any screws.

T PHIELE-SMALL ARAMETERS

REE

-A

ESONANCE

: F

) 26.00

OMPLIANCE

OLUME

: V

(

3) 1.50

(

LITERS

) 42.00

ECHANICAL

Q: Q

7.69

LECTRICAL

Q: Q

0.26

OTAL

Q: Q

0.25

AXIMUM

XCURSION

: X

MAX

(

) 0.37

MAX

(

) 9.50

OICE

OIL

ESISTANCE

: R

(

OHMS

) 3.00

SPECIFICATIONS

IAMETER

: 8" (203.2

)

ENSITIVITY

(2.83 V @ 1

): 90 dB

OWER

ANDLING

: 200 W

RMS PER VOICE COIL

REQUENCY

ESPONSE

: 20 ~ 600 H

OMINAL

MPEDANCE

: 4

OHMS PER VOICE COIL

IMENSIONS

Infinity Systems, Inc. • 20630 Nordhoff Street

Chatsworth, CA 91311, USA •VOICE (818) 407- 0228 • FAX (818) 709 -9486

Infinity Systems, Inc. • 20630 Nordhoff Street

Chatsworth, CA 91311, USA •VOICE (818) 407- 0228 • FAX (818) 709 -9486

mounting depth

3.625" (92.08 mm)

cutout diameter

7.28" (184.91 mm)

outer diameter

8.78" (223.01 mm)

Printed In Japan

BETA IGHTE .DVC 2-O (PHM ARALLEL) WIRING

BETA IGHTE .DVC 8-O (S ) WHM ERIES IRING

BETA EIGHT. S WDVC UMMED-MONO IRING

BETA IGHTE . D WDVC UAL-SUBWOOFER IRING

IMPORTANT: When connecting two Beta

Eight.dvc subwoofers together, use Method #1 to

create a net 4-ohm impedance. NEVER USE

METHOD #2, since most amplifiers cannot fully

control driver movement in this configuration.

–

Beta Eight.dvc

(rear view)

–+

– +

From

Left

Amp

Output

From

Right

Amp

Output

From

Amp

Output

–

Beta Eight.dvc

(rear view)

–

–+

From

Amp

Output

–

Beta Eight.dvc

(rear view)

–

–+

DECLARATION OF CONFORMITY

We, Infinity Systems A/S

Kongevejen 194B

DK-3460 Birkerød

DENMARK

declare in own responsibility, that the Beta Eight.dvc subwoofer

is in compliance with technical standards

EN 50 081-1/1992 and EN 50 082-1/3.1995

Steen Michaelsen

Infinity Systems A/S

Birkerød. DENMARK. 4/96

–

From

Amp

Output

(Dual) Beta Eight.dvc

(rear view)

METHOD #1

–+

–+–+

–

From

Amp

Output

(Dual) Beta Eight.dvc

(rear view)

METHOD #2

–

– +

–

– +

BETA IGHTE . VDVC ENTED NCLOSUREEBETA IGHTE . SDVC EALED NCLOSUREE

VBOX = Box Volume

(see responses below)

Beta Eight.dvc

(side view)

Port

D = diameter

(see responses

below)

L = length

(see responses

below)

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Vented Enclosure – Flat Response

-30

-20

-10

Free-Field

VBOX*= 0.50 ft3

L = 7.10"

D = 2.00"

Close-Field (In Car )

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Vented Enclosure – Enhanced Response

-30

-20

-10

Free-Field

Close-Field

(In Car)

VBOX*= 0.75 ft3

L = 2.90 "

D = 2.00 "

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Vented Enclosure – Extended Response

-30

-20

-10

NOT RECOMMENDED

VBOX = Box Volume

(see responses below)

Beta Eight.dvc

(side view)

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Sealed Enclosure – Flat Response

-30

-20

-10

Free-Field

Close-Field (In Car )

VBOX*= 0.25 ft3

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Sealed Enclosure – Enhanced Response

-30

-20

-10

NOT RECOMMENDED

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Sealed Enclosure – Extended Response

-30

-20

-10

Free-Field

Close-Field (In Car )

VBOX*= 0.40 ft3

BETA IGHTE . BDVC AND-PASS NCLOSUREE

VBOXR

= Box Volume Rear

(see responses below)

VBOXF = Box Vol. Front

(see below)

Beta Eight.dvc

(side view)

Port

D = diameter

(see responses

below)

L= length

(see

responses

below)

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Band-Pass Enclosure – Flat Response

-30

-20

-10

Free-Field

Close-Field (In Car)

VBOXF*= 0.32 ft3

VBOXR*= 0.40 ft3

L = 4.40"

D = 2.00"

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Band-Pass Enclosure – Enhanced Response

-30

-20

-10

NOT RECOMMENDED

dB (Normalized)

Freq.

(Hz)

100 50050 1k

Beta Eight.dvc Band-Pass Enclosure – Extended Response

-30

-20

-10

Free-Field

Close-Field (In Car)

VBOXF*= 0.35 ft3

VBOXR*= 0.60 ft3

L = 4.50"

D = 2.00"

S E TUBWOOFER NCLOSURE RADE OFFS-

Subwoofer enclosures are classified as sealed (acoustic

suspension) or ported (bass-reflex), and can be built in

many configurations. Here we discuss three popular box

types and encourage you to compare their response

curves, noting the differences in Beta Eight.dvc output

level and frequency response versus volume in sealed,

vented, and single-reflex band-pass enclosures.

A sealed enclosure is the smallest and simplest to build,

with high power handling, good phase coherence, and

the most predictable response, at the expense of some-

what diminished sound output. If amplifier power is not

a concern, this is the best choice for most systems, pro-

viding the highest output at the lowest frequencies.

A vented enclosure adds a port (or vent) tuned to the

speaker’s resonance in the box to help boost sound out-

put by “tuning” the rear sound waves so they add to the

front ones. It is more efficient than a sealed box above

the tuned frequency, but more difficult to build properly.

For frequencies below the tuned range, output is less-

ened due to sound cancellation, and there is a 180-

degree phase shift at the tuned frequency. Other draw-

backs are the increased box size for the added port and

diminished power handling due to woofer over-excur-

sion at frequencies below the tuned frequency.

A single-reflex band-pass enclosure counteracts the

sound cancellation properties in vented designs by iso-

lating the subwoofer from the port within its own enclo-

sure. It offers higher power handling, and an automatic

band-pass response to help roll off higher frequencies.

However, it has a 180-degree phase shift at the tuned

frequency. Also, complexity and size are increased, due to

separate front and rear chambers, and it requires

adding substantial midbass drivers elsewhere in the car.

We recommend a sealed enclosure for the Beta

Eight.dvc. Depending on your taste in music, you can

select a box volume for a flat, enhanced, or extended

bass response (see graphs on right). The flat response is

optimum for all enclosures and types of music. The

enhanced sealed box provides a “tighter” bass, great for

rock and rap. An enhanced vented box has increased

output, but with diminished transient response and

power handling. The extended sealed box is more effi-

cient at the lowest frequencies, providing added bass

boost for jazz and classical music, but with diminished

power handling. The extended response curve provides

the best power handling for vented enclosures.

For more help, please call Infinity technical support at:

(800) 553-3332 *If filling is desired, reduce box volume by 20%. *If filling is desired, reduce box volume by 20%. *If filling is desired, reduce box volume by 20%.