OZ VECTOR SUBWOOFER USER MANUAL
INSTALLATION GUIDELINES
WARNING: Both voice coils must be connected to the amplifier for correct operation of
this speaker.
Use of this speaker with only one voice coil connected voids all warranties. Voice coils may
be wired in parallel or series to connect to a single channel of an amplifier or a mono-bridged
amplifier.
Important Notice:
In case of connection with reverse polarity at only one pair of the connector pins, the voice
coils are working against each other.
In this case you would not hear any bass but the voice coils are still heavily used. This might
cause damage to the subwoofer.
Double-check the wiring connections and start testing the system with low volume level.
Attention: If sheet metal must be cut or removed, contact your authorized car audio
dealer for professional advice. By damage to supporting body, the safety certificate may
be withdrawn.
.
•Before cutting any trim or steel, make sure you clear all moving parts and factory
electrical lines.
•Be sure to leave enough slack in the wire to prevent pulling or stretching wires
for service later.
•Tie down all loose wires to prevent them from getting caught in moving parts
or shorted due to abrasion over time.
•Never mount speakers in a car’s wheel wells or areas where they might be
subjected to moisture or road spray.
•Proper speaker polarity must be preserved. The polarity positive side is marked
by a + sign and/or a red dot. At low frequencies woofers out-of-phase will
acoustically cancel which will result in little bass output.
•Although the components used in Oz Audio exceed most international standards,
speaker frames can be twisted by improper installation on uneven surfaces. This
can occur when the surface is heavily padded or carpeted and the screws are
unevenly or over tightened.
•When installing more than one speaker per amplifier channel, be sure that the
combined impedance values cannot damage the amplifier.
•Speaker wire should be isolated from the electrical system of the car and routed
away from any factory systems in order to avoid noise picked up and fed back
to the amplifiers.
•Speaker wire size should be of sufficient size in order to carry the full power of
the amplifier/s.
•Do not drill or drive screws through any vehicle interior or carpeted floor before
inspecting the underside for potential punctures to control lines or cables. Be
sure to avoid all fuel lines, brake lines, electrical cables or oil lines when planning
the installation.
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Advantages And Disadvantages of Most Popular Enclosure Designs
COMMON ENCLOSURE TYPES
In the car audio world there are 3 types of subwoofer enclosures commonly used;
SEALED BOX
(closed box), VENTED BOX (bass reflex) and SINGLE-VENTED BANDPASS ( 4th order ). No single
design is superior because each has its own compromise in performance, power handling, and
design complexity.
SEALED boxes offer one of the best compromises in power handling and performance.
Because of the “air spring” provided by the box the advantages include simple box
construction, high power handling, excellent transient response, and smooth low
frequency roll-off. Disadvantages include only moderate efficiencies at low frequencies
and the need for large box volumes.
VENTED boxes extend the low frequency response below that of the sealed box by
using a port tube. Advantages
include extended low frequency response, lower
distortion due to smaller cone movements in its passband, good efficiency, good
transient response, moderate size boxes, and high power capacity. Disadvantages
include increased complexity in box design and possible woofer damage due
to over
excursion of the woofer cone below the cut-off frequency of the vented box.
SINGLE-VENTED BANDPASS boxes are relatively new
for use in the car but offer some
advantages of both the sealed and vented designs. Advantages include
reasonable efficiency,
small box volumes, good transient response, extended low frequency performance, and can
be used with very high power amplifiers. Disadvantages
include increased complexity in box
design and construction.
Sealed Enclosures - The use of a sealed enclosure is not recommended unless the majority
of music listened to (Genre) is either, Classic Rock, Contemporary Rock, Heavy Metal, Jazz,
Classical, some forms of Dance and Techno or Country Western music. If one’s Genre is that
of Rap, R&B or any form of Hip Hop, the use of a vented enclosure is recommended.
Vented Enclosures - The use of a vented enclosure is recommended when low bass extension
is desired as well as an increase in SPL level in the overall bass response .The graphs below
depict the basic difference in response between a sealed box recommendation and that of the
same driver in a vented application. The use of this type of enclosure is recommended if the main
music Genre listened to is Rap, R&B or any form of Hip Hop.
Band Pass Enclosures - The use of a band pass type enclosure is recommended when
the full sound of bass reproduction is desired to be heard in the sitting (cabin) area of the
vehicle when the enclosure is typically mounted in another compartment, such as the trunk of
a sedan. NOTE: All or part of the port may be mounted on the outside of the enclosure.
PLEASE CALL TECH SUPPORT IN REGARDS TO THE DESIGN OF ANY TYPE OF BAND
PASS ENCLOSURE.
Typical Sealed Box Response GraphTypical Ported Box Response Graph
Typical Bandpass Box Response Graph
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Oz Audio Vector Series Subwoofer User Manual
Size
In most vehicles, an 8” to 12” diameter subwoofer is likely to fit and provide excellent output
when placed in a correctly sized enclosure. Be sure to review the subwoofer’s recommended
enclosure volume before selecting or constructing a subwoofer enclosure. If vehicle space is
limited, it is better to go with a smaller diameter subwoofer with a properly sized enclosure,
rather than squeezing a larger diameter subwoofer into an under-sized enclosure. If space
limitations are not a problem, larger 12” or 15” subwoofers (even multiple subwoofers) are
possible.
RMS Power Handling
Use RMS power ratings to select an amplifier to power your subwoofer. Match the amplifier’s
per channel RMS power with the subwoofer’s RMS power handling. “Peak” or “Max” power
ratings on either the amplifier or subwoofer can be misleading since each manufacturer defines
Peak ratings differently. RMS power handling is a good indication of continuous reliability of
both the subwoofer and amplifier when used in the correct enclosure.
Voice Coils
The decision to purchase a single voice coil (SVC) or dual voice coil (DVC) subwoofer, and
its nominal impedance (Ohms), depends on the “load” of the subwoofer(s) connected to the
amplifier. A general rule of thumb is to choose voice coil configurations that load amplifiers
at 4 ohms (2 ohms on amplifiers that can support it). This allows the amplifier to power the
subwoofer(s) continuously with no overheating or overloading problems. A single subwoofer
with a single voice coil is straightforward (for example – 4 ohms). Multiple SVC and one or
more DVC subwoofers can be wired in series, parallel or series-parallel combinations.
Each wiring design allows for a different configuration of subwoofer(s) to amplifier(s) and is
necessary because not all subwoofer voice coils are the same nominal impedance. See the
series and parallel connections section in this manual for tips on DVC and multiple subwoofer
connections to an amplifier.
Before You Begin - Determine
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t
t
V
H
Oz Audio Vector Series Subwoofer User Manual
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OzV-8.2S4
OzV-10.2D2/4
OzV-10.25D2/4
OzV-12.2D2/4
OzV-12.25D2/4
All These enclosure recommendations have been
calculated with the airspace inside and include the
displacement of the driver motor assembly (and port
in regards to ported enclosure types).
NOTE: Recommendations for volumes and
dimensions for all types of enclosures are intended
for use with a single woofer. If more than one woofer
is to be used, multiply the recommended volume by
the number of woofers you intend on using.
.5 cu. ft.
.8 cu. ft.
1.6 cu. ft.
11.5” x 11.5” x 10”
13.5” x 13.5”x 11”
Subwoofer
Volume
(Net Internal)
External Dimensions
(Width x Height x Depth)
Recommended Sealed Enclosures
14.16 liter
22.65 liter
45.31 liter
OzV-8.2S4
Subwoofer
1.1 cu. ft.
OzV-12.2D2/4
OzV-12.25D2/4
2.17 cu. ft.
Volume
Enclosure
External Dimensions
(Width x Height x Depth)
(Net Internal)
31.15 liter
48.14 liter
Recommended Vented/Ported Enclosure
292mm x 292mm x 254mm
343mm x 343mm x 279mm
15.5” x 15.5” x 15.75”
394mm x 394mm x 400mm
OzV-10.2D2/4
OzV-10.25D2/4
12.5” x 12.5 x 17.5”
15.5” x 15.5” x 16”
16” x 16” x 19”
Port Dimensions
Round - Diameter (RPD), Length (RPL)
317mm x 317mm x 444mm
394mm x 394mm x 406mm
mm x 406mm x 483mm
Slotted - Width (SW), Length (SL), Height (SH)
RPD-3” (76mm)RPL-12” (305mm)
SW-.65”(165mm) SL-12”(305mm)SH-11”(279mm)
RPD - 4”RPL - 11.5”
H
SW-.9”(23mm) SH-14”(356mm)
RPD - 4” (102mm)RPL - 14”
SW-1.2”(30mm) SL-14”(356mm) SH-15”(381mm)
(292mm)
(356mm)
40661.48 liter
If you would like to use either enclosure, but the box designs we
provide you with (in this manual) do not fit your application because
of W, H or D, the designs can be modified. The shape of the
enclosure is not vital, but The Volume Is. The volume of the design
you choose, must stay the same.
NOTE: Do not install a ported box with the port against a solid
surface. The port opening must remain unobstructed. The vent's
placement within the enclosure is also important. You must leave at
least 3” (76mm) between the vent and any inside wall.
(102mm)
Sealed Enclosure Application
SL-11.5”(292mm)
D
Vented Enclosure Using
Round Port Tubes
WSLW
SH
RPL
H
D
Vented Enclosure
Applications
Vented Enclosures
Using Slotted Port
W
SW
RPD
Series connection, one path
for current-impedance adds
Parallel connection, two
paths for current-impedance
reduces
Speaker Connections In Series Or Parallel
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The diagram to the left shows two speakers connected in
series. Assume that the positive lead from the power
source connects to the left speaker's positive terminal,
and that the lead connecting over to the speaker on the
right also goes to that speaker's positive terminal. The
right speaker's remaining terminal is negative and is
connected to the negative terminal of the power
amplifier. Because there is one path for current that
passes through two impedances, the impedances add.
With these 2 ohm speakers, the resulting total
impedance would be 4 ohms. As the higher impedance
will reduce current flow for a given voltage, this
represents a lighter load to the amplifier than the single
speaker.
In the second example, the speakers are wired together
in parallel; there are two paths for current to flow. If the
speakers are the same impedance, then each will flow
the same amount of current, for twice the total amount
that the single speaker would otherwise flow (for a given
voltage). Therefore, if each speaker is 4 ohms, the
overall circuit impedance is 2 ohms. It should stand to
reason that a single 2 ohm speaker would flow the same
amount of current.
As you can see in the wiring examples how multiple
speakers are connected to an amplifier channel has a
great affect on the performance of the amplifier. If not
rated for a 1 ohm load, an amplifier connected to such a
load can over heat and shut down, or possibly even be
damaged. Also, an amplifier will not provide its best
sonic quality driving an impedance load heavier than it is
rated for.
Examples Of Speaker Connections In Series Or Parallel
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Examples Of Speaker Connections In Series Or Parallel
Oz Audio Vector Series Subwoofer User Manual
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Subwoofer
OzV-8.2S4
Oz Audio Subwoofer Dimension Guide
315 mm
12.4 inches
297 mm
11.7 inches
281 mm
11 inches
139 mm157 mm
315 mm
12.4 inches
297 mm
11.7 inches
281 mm
11 inches
127 mm
5.00 inches
145 mm
5.71 inches
260 mm
10.25 inches
247 mm
9.72 inches
232 mm
9.13 inches
127 mm144 mm
260 mm
10.25 inches
247 mm
9.72 inches
232 mm
9.13 inches
114 mm132 mm
215 mm200 mm181 mm110 mm125 mm
7.13 inches7.87 inches8.46 inches
6.18 inches
5.67 inches
5.47 inches
5.00 inches
4.50 inches5.20 inches
4.33 inches4.92 inches
Oz Audio Vector Series Subwoofer User Manual
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OzV-10.2D2/4
OzV-10.25D2/4
OzV-12.2D2/4
OzV-12.25D2/4
B
A
C
DE
Oz Audio
1572 W. San Bernardino Rd
Covina, Ca 91722
Phone: 626 521-9980
Sales: 626 521-9984
Info@ozaudio.com
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