Infinity 10" Dual Voice-Coil Subwoofer Beta Ten.dvc User manual

CAR AUDIO
Thank you for purchasing an Infinity Beta Ten.dvc
10" Dual Voice-Coil Subwoofer. You’ve selected a
premium 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
consumer 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 Ten.dvc 10" 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.
• 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.
THIELE-SMALL PARAMETERS
F REE -A IR R ESONANCE :F
S
(H Z ) 24.00
C
OMPLIANCE V OLUME :V
AS
( FT
3) 2.70
V
AS
( LITERS ) 77.00
M
ECHANICAL Q: Q
MS
8.08
E
LECTRICAL Q: Q
ES
0.20
T
OTAL Q: Q
TS
0.20
M
AXIMUM E XCURSION :X
MAX
( IN ) 0.39
X
MAX
( MM ) 10.00
V
OICE C OIL D C R ESISTANCE :R
E
( OHMS )2.80
SPECIFICATIONS
D IAMETER : 10" (254.0 MM )
S
ENSITIVITY (2.83 V @ 1 M ): 93 dB
P
OWER H ANDLING : 250 W
RMS PER VOICE COIL
F REQUENCY R ESPONSE : 20 ~ 500 H Z
N OMINAL I MPEDANCE :4 OHMS PER VOICE COIL
D IMENSIONS :
®
Infinity Systems, Inc. • 20630 Nordhoff Street
Chatsworth, CA 91311, USA •VOICE (818) 407- 0228 • FAX [phone]
®
Infinity Systems, Inc. • 20630 Nordhoff Street
Chatsworth, CA 91311, USA •VOICE (818) 407- 0228 • FAX [phone]
mounting depth
4.75" (120.65 mm)
cutout diameter
9.37" (238.00 mm)
outer diameter
10.70" (271.78 mm)
Printed In Japan
Ten.dvc 10" Subwoofer
INSTRUCTIONS
BETA TEN.DVC 2-OHM (PARALLEL) WIRING
BETA TEN.DVC 8-OHM (SERIES) WIRING
BETA TEN.DVC SUMMED-MONO WIRING
BETA TEN.DVC DUAL-SUBWOOFER WIRING
IMPORTANT: When connecting two Beta
Ten.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 Ten.dvc
(rear view)
–
+
–+
From
Left
Amp
Output
From
Right
Amp
Output
®
From
Amp
Output
+
–
Beta Ten.dvc
(rear view)
–
+
–+
®
From
Amp
Output
+
–
Beta Ten.dvc
(rear view)
–
+
–+
DECLARATION OF CONFORMITY
We, Infinity Systems A/S
Kongevejen 194B
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the Beta Ten.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 Ten.dvc
(rear view)
METHOD #1
–
+
®
–
+
–+–+
+
–
From
Amp
Output
(Dual) Beta Ten.dvc
(rear view)
METHOD #2
+
®
–
+
–+
®
–
+
–+
Beta Ten.dvc Manual 9/16/98 10:45 AM Page 1

BETA TEN.DVC VENTED ENCLOSUREBETA TEN.DVC SEALED ENCLOSURE
VBOX = Box Volume
(see responses below)
Beta Ten.dvc
(side view)
Port
D = diameter
(see responses
below)
L = length
(see responses
below)
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Vented Enclosure – Flat Response
10
-30
-20
-10
0
Free-Field
VBOX*= 0.60 ft3
L = 6.50"
D = 2.50 "
Close-Field (In Car)
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Vented Enclosure – Enhanced Response
10
-30
-20
-10
0
Free-Field
Close-Field
(In Car)
VBOX*= 1.00 ft3
L = 3.75"
D = 3.00 "
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Vented Enclosure – Extended Response
10
-30
-20
-10
0
Free-Field
Close-Field
(In Car)
VBOX*= 0.82 ft3
L = 7.80"
D = 3.00 "
VBOX = Box Volume
(see responses below)
Beta Ten.dvc
(side view)
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Sealed Enclosure – Flat Response
10
-30
-20
-10
0
Free-Field
Close-Field (In Car)
VBOX*= 0.50 ft3
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Sealed Enclosure – Enhanced Response
10
-30
-20
-10
0
NOT RECOMMENDED
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Sealed Enclosure – Extended Response
10
-30
-20
-10
0
Free-Field
Close-Field (In Car)
VBOX*= 0.70 ft3
BETA TEN.DVC BAND-PASS ENCLOSURE
VBOXR = Box Volume Rear
(see responses below)
VBOXF = Box Vol. Front
(see below)
Beta Ten.dvc
(side view)
Port
D = diameter
(see responses
below)
L= length
(see
responses
below)
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Band-Pass Enclosure – Flat Response
10
-30
-20
-10
0
Free-Field
Close-Field (In Car)
VBOXF*= 0.36 ft3
VBOXR*= 0.45 ft3
L = 6.60"
D = 3.00 "
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Band-Pass Enclosure – Enhanced Response
10
-30
-20
-10
0
Free-Field
Close-Field (In Car)
VBOXF*= 0.30 ft3
VBOXR*= 0.42 ft3
L = 6.30"
D = 3.00 "
dB (Normalized)
Freq.
(Hz)
100 50050 1k
Beta Ten.dvc Band-Pass Enclosure – Extended Response
10
-30
-20
-10
0
Free-Field
Close-Field (In Car)
VBOXF*= 0.45 ft3
VBOXR*= 0.65 ft3
L = 6.25"
D = 3.00 "
SUBWOOFER ENCLOSURE TRADE-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 Ten.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 Ten.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 efficient at the lowest fre-
quencies, providing added bass boost for jazz and classi-
cal music, but with diminished power handling. The
extended response curve provides the best power han-
dling for vented enclosures.
For more help, please call Infinity technical support at:
[phone] *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%.
Beta Ten.dvc Manual 9/16/98 10:45 AM Page 2