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 vent and multiply “X x Y x Z”, and convert to cubic feet, for example the 12L7 vented
Compact design’s external vent dimensions are, using 3/4” (1.9cm) MDF:
[ (13.25” + 1.5” total MDF wall thickness) x (2.5” + 1.5” total MDF wall thickness) x 22.5”] x (1 ft3/ 1728 in3) = .77 ft3
Add this number to the internal volume of the enclosure. The 12L7 is:
1.75 ft3+ .77 ft3= 2.52 ft3.
Due to the necessary length of these vents, you may want to fold the vent along the bottom
and back walls. It will be impractical to use round vents for these designs. Do not install a vent
opening against a solid surface, such as an internal brace, back-panel or trunk wall, seat or
interior panel of your vehicle. The vent opening must remain unobstructed. Use the smallest
dimension of the rectangular vent as the minimum amount of space between the vent opening
and any solid surface to insure unrestricted airflow.
If you prefer an ultra-smooth bass response, you should loosely fill your L7 enclosure with poly-
fil stuffing. Vented designs will require covering the end of the port (located inside the box) with
grill cloth, chicken wire, or expanded metal to prevent the poly-fil from exiting the port. The use
of poly-fil will slightly decrease efficiency, but will deepen and extend the low frequency output.
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 e-mail support@kicker.com or call
Technical Support at (405) 624-8583 for specific or unanswered questions.
WARNING: KICKER products are capable of producing sound levels that can permanently
damage your hearing! Turning up a system to a level that has audible distortion is more damaging
to your ears than listening to an undistorted system at the same volume level. The threshold of pain
is always an indicator that the sound level is too loud and may permanently damage your hearing.
Please use common sense when controlling volume.
IMPORTANT SAFETY WARNING – PROLONGED CONTINUOUS OPERATION OF AN
AMPLIFIER IN A DISTORTED OR CLIPPED MANNER CAN CAUSE YOUR AUDIO
SYSTEM TO OVERHEAT, POSSIBLY CATCHING FIRE AND RESULTING IN SERIOUS
DAMAGE TO YOUR COMPONENTS AND/OR VEHICLE.
Y
X
Z
2015 L7 Subwoofers Manual Rev G.indd 92015 L7 Subwoofers Manual Rev G.indd 9 11/6/2014 9:25:58 AM11/6/2014 9:25:58 AM
