4
VENTED ENCLOSURE APPLICATIONS
CompVR subwoofers will handle massive amounts of power in any of the recommended enclosures,
minimum or maximum. The smaller enclosures are best for use in limited-space applications. The larger
recommended enclosures will yield slightly more bass at the lowest frequencies.
The vented minimum design increases bass efficiency and fits in many space-limited applications.
Although it is the smallest recommended vented enclosure, the output from 30Hz–80Hz will be
considerably higher than that of a sealed box. The maximum vented design has even more output in this
frequency band. The maximum vented enclosure is the largest and most efficient design.
BOX BUILDING NOTES
Use 3/4” (1.9cm) or thicker MDF (medium density
fiberboard) and seal the joints with silicone. Use the
“template” inside your CompVR’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 3.
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 final
design.
Use the outer dimensions of the port and multiply
“X xY xZ”, then convert to cubic feet. For example,
the CVR12 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,
Then, add this number to the internal volume of the enclosure. 1.75 ft3+.65 ft3= 2.4 ft3. See Figure 4.
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.
D
D
D
Figure 3
D = 3” x 3” for CVR15, CVR12
D = 2” x 2” for CVR10
Vented Minimum CVR10 CVR12 CVR15
Box Volume, ft3[L] 1.25 [35.4] 1.75 [49.6] 3 [85]
Port Opening, in x in [cm x cm] 2X10.5 [5.1X26.7] 2.5X12.5 [6.4X31.8] 2.75X15.5 [7X39.4]
Port Length, in [cm] 20 [50.8] 20 [50.8] 25.75 [65.4]
Power Handling, RMS 300 300 500
Vented Maximum CVR10 CVR12 CVR15
Box Volume, ft3[L] 1.75 [49.6] 2.25 [63.7] 5 [142]
Port Opening, in x in [cm x cm] 2.5X10.5 [6.4X26.7] 3X12.5 [7.6X31.8] 3X15.5 [7.6X39.4]
Port Length, in [cm] 20 [50.8] 20.5 [52.1] 22 [55.9]
Power Handling, RMS 300 300 500
