Diagram enclosure -1 dimension 4320 ÷ 15 ÷20 = 14.4
So our depth is 14.4” for this enclosure
Note : this formula is for the INTERNAL dimensions, please add the thickness of the material used to construct the enclosure to
the formula to give you the outside dimensions.
So assuming we are using 1 inch material we need to add 2 thicknesses to each internal dimension to allow for material top and
bottom so the external dimensions for this enclosure would be 17 x 22 x 16.4 inches
The displacement of the woofer and the displacement of the port must also be added to the required volume before you calculate
the required sizes needed to build your enclosure
Ported enclosure construction
When constructing a ported enclosure, additional care needs to be taken with the port itself.
If using a round port a gap in inches at least equal to the diameter of the port must be left both in front of and behind the port to
provide unobstructed airflow, for example, if we are using a 3” port we need to leave 3” gap between the rear of the enclosure,
the vehicle and the port
If using a slot port you must leave a gap at least equal to the shortest measurement of the port between the rear of the
enclosure, the vehicle and the port
VIBE recommends the use of a slot port for the BLACKDEATH subwoofer as it is difficult to find a circular port with the required
cross sectional area and using a slot port made from the same material as the enclosure allows the port to be tied into the
construction of the enclosure and add further stability acting as another brace.
The ideal place for the port is on the same baffle as the woofer,
2.5cuft enc 0.37cuft port
Enclosure - 17” x 28” x 11”
Port – 8” x 5” x 16” length
3.5cuft enc 0.52cuft port
Enclosure – 17” x 30” x 14”
Port – 8” x 7” x 16” length
4.5cuft enc 0.67cuft port
Enclosure – 17” x 36” x 15”
Port – 8” x 9” x 16” long
recomended enclosures - internal volumes
