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Engineered for high output with powerful low frequency extension the 18PT-8 18 professional woofer is ideal for use in large low-cost sound systems. Packed with features you would expect from much more expensive drivers the 18PT-8 is built for low distortion and reliability even when pushed to its limit. The lightweight reinforced paper cone has excellent damping properties minimizing unwanted resonances and the ribbed surface controls cone breakup to ensure smooth response all the way up to 1000 Hz. Driving the cone is a 3 diameter dual-layer voice coil that is wound on a heat resistant polyimide former to handle up to 350 watt RMS. Extensive venting through frame pole piece and magnetic gap cools the voice coil to prevent thermal runaway and lower power compression during long sessions at high power. With a copper cap on the pole piece keeping inductance under control you can ensure that the 18PT-8 will provide low distortion throughout its useable bandwidth. Whether you need a drop-in replacement for a blown professional subwoofer or are designing a new system the 18PT-8 is the ideal choice if you want high impact low frequency response without spending a fortune.