L7T102 - Subwoofer KICKER - Free user manual and instructions

USER MANUAL L7T102 KICKER

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. 2019 L7T Rev D.indd 22019 L7T Rev D.indd 2 2/14/2019 9:50:12 AM2/14/2019 9:50:12 AM3 SPECIFICATIONS Model L7T8 L7T10 L7T12 Rated Impedance [Ω] 2 or 4 2 or 4 2 or 4 Fs [Hz] 45.4 30.75 26.3 Recommended Amplifi er Power [Watts RMS] 350 500 600 Peak Power Handling [Watts] 700 1000 1200 Sensitivity [1W, 1m] 84.835 85.98 86.54 Xmax (Linear Excursion) [mm] 7.25 9.2 10.25 Re [Ω] 7.37 7.42 7.14 Qms 8.516 9.33 8.7605 Qes 0.674 0.563 0.641 Qts 0.625 0.531 0.597 Mms [g] 99.385 175.13 242.952 Sd [cm

] 268.96 453.69 645.17 Cms 0.1235 0.1535 0.1505 BL 17.604 21.114 21.138 Le [mH] 3.443 5.625 6.41 Vas [ft³, L] 0.45, 12.69 1.57, 44.59 3.14, 88.85 Frequency Response [Hz] 30–100 25–100 25–100 Note: All specifi cations and performance fi gures are subject to change. Please visit www.kicker.com for the most current information. To get the best performance from your new KICKER Subwoofer, we recommend using genuine KICKER Accessories and Wiring. Please allow two weeks of break-in time for the subwoofer to reach optimum performance. Figure 1 Series Wiring Parallel Wiring Dual 2 Voice Coils = 4 Load Dual 4 Voice Coils = 8 Load Dual 2 Voice Coils = 1 Load Dual 4 Voice Coils = 2 Load coil 1+ coil 1+ coil 2+ coil 2+ coil 2- coil 2- coil 1- coil 1- WIRING L7T subwoofers are available with dual 2 (ohm) or dual 4 voice coils. Both coils must be connected to a source of amplifi cation. The dual 2 woofer will generate a 1 load if the coils are wired in parallel or a 4 load in series. The dual 4 woofer will provide a 2 load wired in parallel or 8 load wired in series. See Figure 1. 2019 L7T Rev D.indd 32019 L7T Rev D.indd 3 2/14/2019 9:50:12 AM2/14/2019 9:50:12 AM4

Use 3/4” (1.9cm) or thicker MDF (medium density fi berboard) and seal the joints with silicone. Use the “template” inside your L7T’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 2. 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 port and multiply “X x Y x Z”, convert to cubic feet, for example the L7T12 vented Minimum 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 ft

and add this number to the internal volume of the enclosure, L7T12’s 1.75 ft

. See Figure 3. 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, back-panel or trunk wall, seat or interior panel of your vehicle. The port opening must remain unobstructed. Use the smallest dimension of the rectangular port as the minimum amount of space between the port opening and any solid surface to insure unrestricted airfl ow. If you prefer a smooth bass response, you should loosely fi ll your L7T enclosure with poly-fi l stuffi ng. Ported 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 [e-mail] or call Technical Support at [phone] for specifi c or unanswered questions.

Figure 2 Figure 3 D = 3” x 3” for L7T12 D = 2” x 2” for L7T8, L7T10 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. 2019 L7T Rev D.indd 42019 L7T Rev D.indd 4 2/14/2019 9:50:13 AM2/14/2019 9:50:13 AM5

VENTED ENCLOSURE APPLICATIONS

L7T 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. Vented Minimum L7T8 L7T10 L7T12 Box Volume, ft³ (L) + port displacement .8, 22.7 1.25, 35.4 1.75, 49.6 Port Opening Size, in x in (cm x cm) 1.5x8, 3.8x20.3 2x10.5, 5.1x26.7 2.5x12.5, 6.4x31.8 Port Length, in (cm) 20.75, 52 20, 50.8 20, 50.8 Power Handling, RMS 350 500 600 Vented Maximum L7T8 L7T10 L7T12 Box Volume, ft³ (L) + port displacement 1.2, 34 1.75, 49.6 2.25, 63.7 Port Opening Size, in x in (cm x cm) 2x8, 5.1x20.3 2.5x10.5, 6.4x26.7 3x12.5, 7.6x31.8 Port Length, in (cm) 19.125, 48.6 20, 50.8 20.5, 52.1 Power Handling, RMS 350 500 600

Sealed Minimum Sealed Maximum The L7T generates more sound pressure than an equivalently-sized round speaker and excels when used in the recommended sealed boxes. These sealed enclosure designs give the smoothest response with increased energy at the lowest frequencies, 25 to 30Hz. The maximum enclosure volume application is ideal for SQ (ultra sound quality) installations and generates a very fl at response curve, extending the sub- bass response. L7T woofers perform well in any size sealed enclosure between the Minimum and Maximum volume recommendations. These systems will exhibit benefi ts of both designs: Minimum produces high- impact bass, and Maximum generates low bass frequency protraction. Overall, the system will sound more like the recommended enclosure design it is closest to in enclosure volume. These enclosure recommendations have been calculated with the airspace inside the enclosure and include the displacement of the woofer. All sealed-enclosure airspace should be fi lled to 50% loose poly-fi l (polyester fi berfi ll) stuffi ng. Do not make the airspace greater than the SQ, maximum enclosure volume, recommendation. The ported Minimum design increases bass effi ciency and fi ts in many space-limited applications. Although it is the smallest recommended ported enclosure, the output from 30 to 80 Hz will be considerably higher than that of any sealed box. The Maximum ported design has even more output in this crucial frequency band. The Maximum is the largest and most effi cient enclosure design. 2019 L7T Rev D.indd 52019 L7T Rev D.indd 5 2/14/2019 9:50:14 AM2/14/2019 9:50:14 AM6

L7T SUBWOOFER HANDBUCH