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Featured Article: Subwoofers Solobaric Subs:

Kicker's ingenuity is the reason why they're one of the top contenders for the best car audio components. The result of that ingenuity is the production of Kicker's L7 Series Solo-Baric subwoofers. We will review in this article particularly the S12L74; a 12" dual 4 ohm L7 subwoofer.

Pros

Power handling, that is all I have to say. But really, this mighty subwoofer could handle monstrous 1500 watts max with 750 watts RMS. Unlike other cheaper companies, when Kicker say they feature a 750 watts RMS, they really do mean 750 watts RMS. This means you can put out consistently loud (if supplied with proper power) bass on any given day and is capable of peaking at 1500 watts.

The cone is surprisingly not made of any unusual material but uses injection molded polypropylene. However, it is a one piece construction in a patented design Kicker dubbed as "SoloKon". And of course with Solo-Baric construction, it is a square design, allowing for more surface area and more bass production. To top it all off, the surround is Santoprene rubber that is stitched to the cone, providing a highly durable construction that will sure to prevent tearing during high power usage.

Cons

The subwoofer is pricey but you get what you pay for and this subwoofer will definitely impress you with its quality and SPL. With all these great punching features, the subwoofer does have one more drawback other than the price, and that is its break-in period.

The design requires the consumer to use the subwoofer at low levels for at least 20 hours or about two weeks. This will allow for the suspension structure to move around a bit before it is pushed to its optimum capability. It's a lot like how stiff baseball gloves are when you buy them brand new from the store, and they require a bit of breaking in and wear before it could be at all usable on the field. Unfortunately users will run a huge risk of blowing out the speakers if they do not properly follow Kicker's recommendation.

Newer Model Changes Notes

The 2008 and newer models will feature a modified SoloKon design with full back bracing to allow more efficient air movement, giving the new L7 subs the ability to punch much more powerful bass. Unlike the 2006 model, the new 2008 models have perimeter venting. It looks a lot like a hand holding a square bowl; where as the older models have virtually no openings for venting. As a result, there is no need for extra mounting space for venting-giving you the same powerful subwoofer with a much shallower mounting depth. The cone design has changed a bit as well, giving the 2008 models a fresh but stylish new look; and don't worry about power handling because power ratings are rated at the same as the older models. Binding posts have also been repositioned to the corners of the subs. This will allow for a more convenient installation for multiple-subwoofer setups.

Note: This review covers S8L72, S8L74, S10L72, S10L74, S12L72, S12L74, S15L72, S15L74. 2 or 4 at the end of every model refers to dual 2 ohms or dual 4 ohms. Features are generally the same except for power handling and SPL.

Overall

The Kicker 08S12L74 is a magnificent subwoofer and will perform admirably at incredible power handling levels. The subwoofer features a lot of high performance parts and construction, and the subwoofer will do just what you expect it to do. If you have the extra cash and if you're willing to go through the break-in process, you may be rewarded by this great Kicker subwoofer.

Get more information about Kicker Car Audio

Why Do my subwoofers get louder, or produce more bass when I am going down a hill, or into a valley?

I have 2 10" Kicker Solobaric L7's(2004 silver and blue model). I have noticed that when I go downhill, my sub-woofers get louder. This has occurred with my other subs as well. Is this because of the atmospheric pressure change, or is it because the speakers are higher then you and pouring bass into the car? Is it because when I am going down hill, I sit lower then my speakers(as opposed to being on flat land or uphill, as the speakers will be level or lower then me the driver). Does gravity affect the bass in some way(it probably doesn't, but im not sure). Please elaborate. I have looked on the web for an answer to this, but cannot find one. Personally, I think it is an atmospheric change from the drop in elevation, kinda like how your ears pop if you go up or down an incline fast enough(or take off and land in an airplane).

It may be that you dont have as much power going to your amp when you're traveling uphill as opposed to coasting. Try a capacitor to see if that fixes the problem.

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