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The Kicker KS Series 51KSS6904 is a 6x9-inch component speaker system rated at 4 ohms and 125 watts RMS, with a recommended power range of 15 to 150 watts. It pairs damped polypropylene woofers with 25mm silk-dome tweeters and separate crossovers, and the tweeters can be mounted flush, in pods, at an angle, or in the woofer for a coaxial setup. The thin-mount woofers fit behind many factory grilles, which makes it a practical upgrade for stock car audio. Against rivals in its class, it offers more mounting flexibility and higher power handling than basic coaxials, but it needs an amplifier or strong head unit to give its best.
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Store links may earn us a commission.
Lowest price we've seen: $249.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Owners of Kicker KS component sets generally describe a clear step up from factory speakers, with bright but smooth highs and solid midbass. Most praise the build and mounting options; some note that power handling rewards an amplifier and that bass stays limited without a sub.
The Kicker KS Series 6x9" component speaker system is made for car audio. It pairs a 6x9" woofer with a 1" (25mm) silk-dome tweeter. The woofer cone is internally dampened polypropylene with a rubber surround, which gives smooth midrange and bass. The silk-dome tweeters add detailed highs.
The tweeters can be used in a component or a coaxial setup. The bullet-style phase plug is removed and a special adapter is added, so the tweeters can rotate and tilt for better off-axis performance. Four tweeter mounting options are included, along with an articulating tweeter pod.
The thin-mount design fits behind factory grilles. The crossovers are smaller for easier mounting. The recommended amplifier power is 15 to 150 watts RMS.
