Kicker L7QB8

Sub­woofer Sys­tem Re­view

Pasmag (Canada) - - Test Report -

The Kicker car au­dio brand is known for in­no­va­tive and high qual­ity prod­ucts, de­signed and en­gi­neered in Still­wa­ter, Ok­la­homa. When it comes to get­ting qual­ity bass in your car, Kicker sub­woofers have earned a great rep­u­ta­tion as one of the go-to brands in the car au­dio in­dus­try. Now they are in­tro­duc­ing an en­tirely new con­cept for the Kicker brand, an ul­tra com­pact sub­woofer sys­tem uti­liz­ing “Re­flex Sub­woofer™” tech­nol­ogy. The new Q-Class woofer sys­tem is called the L7QB8, and is rated at 500 watts. The L7QB8 is de­signed to ap­peal to the so­phis­ti­cated lis­tener, or just any­one who wants qual­ity bass out­put while giv­ing up as lit­tle cargo space as pos­si­ble. How­ever, in al­most ev­ery other re­gard, the $799.95 sys­tem is quite un­like any­thing else out there. In fact, the unique ap­proach to de­sign and en­gi­neer­ing of this prod­uct earned Kicker a pres­ti­gious CES® In­no­va­tion Award.

As you may have guessed, the sys­tem is based around one of Kick­ers L7 square sub­woofers. But from there on, every­thing is dif­fer­ent. The eight inch square woofer is mounted in a solid alu­minum cab­i­net, which has been seam­lessly ex­truded to a thick­ness of 0.25” in one piece. There are sev­eral ben­e­fits to us­ing an ex­truded solid alu­minum cab­i­net. First it’s ob­vi­ously very ro­bust and durable, but it is also al­most res­o­nance free which im­proves

sound qual­ity. To fur­ther en­hance sound qual­ity, on the op­po­site side from the woofer, a spe­cially tuned L7 pas­sive ra­di­a­tor is mounted to aug­ment the sys­tems out­put.

A pas­sive ra­di­a­tor func­tions much the same way as a port would, but with­out port noise and al­low­ing greater con­trol over the tun­ing of the sys­tem.

The woofer it­self uses a cast alu­minum bas­ket with perime­ter vent­ing to en­sure good heat dis­si­pa­tion, crit­i­cal for high power han­dling. Fur­ther adding to the heat

dis­si­pa­tion and power han­dling ca­pa­bil­ity, a large fer­rite mo­tor as­sem­bly in­cludes an in­te­grated heatsink in the top plate. A solid (non-vented) ex­tended pole piece is forged into the steel bot­tom plate of the woofer for high ex­cur­sion. Elec­tri­cal en­ergy is de­liv­ered via a sin­gle spring loaded ter­mi­nal on the woofer cab­i­net, to a pair of two inch, four ohm, cop­per voice coils wired in par­al­lel for a two ohm am­pli­fier load.

Fol­low­ing the same con­struc­tion as the other L7 woofers, the cone

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