Kicker Q-CLASS 8L7 Manuel D'utilisation page 9

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 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 ft
Add this number to the internal volume of the enclosure. The 12L7 is:
1.75 ft 3 + .77 ft 3 = 2.52 ft 3 .
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 airfl ow.
If you prefer an ultra-smooth bass response, you should loosely fi ll your L7 enclosure with poly-
fi l stuffi ng. 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-fi l from exiting the port. The use
of poly-fi l will slightly decrease effi ciency, 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 specifi c 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.
2015 L7 Subwoofers Manual Rev G.indd 9 2015 L7 Subwoofers Manual Rev G.indd 9
3 3 3
/ 1728 in ) = .77 ft
Y
X
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