Figure 3
Drill with #29 (0.136”, 3.5mm) bit, then countersink with 1/4” (6mm) bit, six holes equally spaced. Use the clearance plate as a template.
51/4”
(13.3cm)
cut out
diameter
61/2”
(16.7cm)
recess outer
diameter
Clearance Plate 1/16” (2mm) recess
design. Use the outer dimensions of the port and multiply “X x Y x Z”, convert to cubic feet, for example the CompVT12 vented compact design’s external port dimensions are, using 3/4” (1.9cm) MDF: [ (12.5” + 1.5” total MDF wall thickness) x (2.5” + 1.5” total MDF wall thickness) x 20”] x (1 ft3 / 1728 in3 ) = .65 ft3, and add this number to the internal volume of the enclosure, CompVT12’s 1.75 ft3 + .65 ft3 = 2.4 ft3. See Figure 5. Due to the necessary length of these ports, you may want to fold the port along the bottom and back walls. It will be impractical to use round ports for these designs. Do not install a port opening against a solid surface, such as an internal brace,
opening and any solid surface to insure unrestricted airfl ow.
Figure 4
D
DD
D = 3” x 3” for CompVT12
D = 2” x 2” for CompVT8/10
Figure 5
VENTED ENCLOSURE APPLICATIONS
These boxes are the enclosure of choice for outrageous street bass and high performance SPL contests. If space is not a problem and you want to get the most from your CompVT, try one of these ported designs. You will not be disappointed. CompVT subwoofers will handle massive amounts of power in any of the recommended enclosures, minimum or maximum. The smaller enclosures are best for use in
Vented Compact | CompVT8 | CompVT10 | CompVT12 |
|
|
|
|
Box Volume, ft3 (L) | .8 (22.7L) | 1.25 (35.4) | 1.75 (49.6) |
Port Opening, in x in (cm x cm) | 1.5 x 8 (3.8 x 20.3) | 2 x 10.5 (5.1 x 26.7) | 2.5 x 12.5 (6.4 x 31.8) |
Port Length, in (cm) | 20.75 (52.7) | 20 (50.8) | 20 (50.8) |
Power Handling, RMS | 75 | 200 | 300 |
Vented SQ | CompVT8 | CompVT10 | CompVT12 |
|
|
|
|
Box Volume, ft3 (L) | 1.2 (34) | 1.75 (49.6) | 2.25 (63.7) |
Port Opening, in x in (cm x cm) | 2 x 8 (5.1 x 20.3) | 2.5 x 10.5 (6.4 x 26.7) | 3 x 12.5 (7.6 x 31.8) |
Port Length, in (cm) | 19.125 (48.6) | 20 (50.8) | 20.5 (52.1) |
Power Handling, RMS | 75 | 200 | 300 |
The ported Compact design increases bass effi ciency and fi ts in many
The SPL / Deep Bass ported design has even more output in this crucial frequency band. The SPL / Deep Bass is the largest and most effi cient enclosure design.
BOX BUILDING NOTES
Use 3/4” (1.9cm) or thicker MDF (medium density fi berboard) and seal the joints with silicone. Use the “template” inside your CompVT’s shipping carton to mark the mounting hole, then cut directly on the line. These designs need internal bracing. Add triangular bracing between each of the larger unsupported panels. See Figure 4.
All the cubic feet (L) measurements in this manual include the displacement of the woofer. For the vented enclosures the displacement of the port must be calculated and added to the internal volume of the fi nal
4 | COMPVT SUBWOOFER |
2010 CompVT d01.indd |
If you prefer an
For more advice on box building, refer to your Authorized Kicker Dealer, or click on the Support tab on the Kicker homepage, www.kicker.com. Please
Y
X
Sound Check: Poor bass response? Check the system phasing by reversing the positive and negative speaker connections on the subwoofer. If the bass improves, then the subwoofer was out of phase in reference to the rest of the audio system.
CompVT Subwoofer - Covered by one or more of the following patents: U.S. Pat #’s 6,611,604, 6,731,773
D473,216, D456,386, D449,293,stillwaterdesigns D355,193, Taiwan Pat. #162,154;
Other U.S. and foreign patents pending.
P.O. Box 459 • Stillwater, Oklahoma 74076 • USA • (405)
5
11/4/2009 5:06:31 PM