Subwoofer System Review
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