Bravox Linha UXP - Manual (Page 4)

-4- UXP10D - UXP12D
ENCLOSURES
BRAVOX ULTIMATE PERFORMANCE PLUS SUBWOOFERS have been specially designed to produce
outstanding results in both small volume sealed and small volume vented enclosures. While it is possible for the
advanced installer to use the Thiele/Small parameters provided in this manual to design their own enclosures (for
th more on "doing it yourself", check out Vance Dickason's Loudspeaker Design Cookbook, 6 Edition at
www.audioXpress.com), all this work has been done for you and provided in the recommended enclosure charts.
The choice of which type of enclosure, vented or sealed, is strictly up to you. As a rule, sealed enclosures provide
better transient bass response than their vented counterparts, although the vented enclosures generally provide more
deep bass. Your choice should be based on the amount of space available and the size of the vehicle. In general,
smaller vehicles (Corvettes to Camry's) probably work best with sealed enclosures while larger vehicles such as
SUV's, Vans, large trucks or RV's can benefit from the kind of performance available from vented enclosures.
However, both enclosure types will work in any situation.
SEALED ENCLOSURES
This enclosure is made up of a totally closed, air-tight box. This type of enclosure gives excellent, tight bass
response, as well as providing an effective control of loudspeaker excursion, maintaining it within reasonable limits
and generally providing lower distortion and very high volume levels. If you build your own enclosure, BRAVOX
recommends that you glue and screw all joints using enough glue to ensure that all joints are air-tight.
VENTED ENCLOSURES
Vented enclosures are not air-tight and incorporate an additional opening known as a port or vent, which is
generally fabricated from either plastic or cardboard tubing. The port augments the sound coming out of the
woofer and is in most cases capable of going lower in frequency than the same woofer in a sealed box. Even
though vented enclosures are not air-tight, you should follow the same procedure as with sealed boxes and glue and
screw together all joints.
The tables below give the internal volume (Vb) in cubic feet and liters for sealed and vented enclosures, each
specifically designed for the ULTIMATE PERFORMANCE PLUS SUBWOOFERS. Sealed enclosures were
calculated for flat response (Qtc in the region of 0.7) but smaller volumes can also be used when an "enhanced"
bass response is desired. The flat response enclosure provides more accurate bass while the smaller "enhanced"
bass enclosures are somewhat less accurate, but have marginally increased power handing. For vented enclosures
an "enhanced" bass response enclosure can be designed as well, but in this case, rather than changing the volume
of the enclosure, a different tunning (vent length) is used. In table bellow, the longer vent leads to a flat response
whereas the shorter one refers to "enhanced" bass enclosure.
SEALED ENCLOSURES
External Dimensions
Model Vb (net)
H W D
0.52 ft3 12" 13" 9"
UXP10D-2
14.9 lts 305 mm 330 mm 229 mm
0.72 ft3 13" 15" 9.5"
UXP10D-4
20.4 lts 330 mm 381 mm 241 mm
1.40 ft3 15" 17" 13"
UXP12D-2
39.5 lts 381 mm 432 mm 330 mm
1.74 ft3 15" 18" 15"
UXP12D-4
49.3 lts 381 mm 457 mm 381 mm
VENTED ENCLOSURES
External Dimensions Vent
Model Vb (net)
H W D Dv Lv (flat) Lv (more bass)
1.40 ft3 15" 17" 13" 4" 16" 8"
UXP10D-2
39.5 lts 381 mm 432 mm 330 mm 100 mm 400 mm 200 mm
1.61 ft3 15" 18" 14" 4" 18" 8"
UXP10D-4
45.7 lts 381 mm 457 mm 356 mm 100 mm 450 mm 200 mm
2.0 ft3 17" 18" 15" 4" 16" 6"
UXP12D-2
56.6 lts 432 mm 457 mm 381 mm 100 mm 400 mm 150 mm
2.0 ft3 17" 18" 15" 4" 14" 6"
UXP12D-4
56.6 lts 432 mm 457 mm 381 mm 100 mm 350 mm 150 mm
External dimensions in above tables assume the use of 0.75 inch (19 mm) thick material
W
H
Vb
CLOSED
D
VENTED
W
H
Vb
D