Product DescriptionSince day one, we have spearheaded the car audio revolution. Nothing has changed. Rockford Fosgate is still the global leader in audio innovation and your passion is our purpose. We engineer the best audio systems for your lifestyle!Amazon.comRockford Fosgate P1 10-inch subwoofers are first in a Rockford's Punch series, and a well-known addition to fanatic car audio systems. Kevlar fiber reinforced paper cones deliver bass impact you can feel, and "VAST" technology increases surface cone area up to 25%. Best in standard sealed and vented enclosures. Includes soft touch ABS tri trim ring. Rockford Fosgate Punch Series Subs Featuring innovative parabolic cone designs, oversized surrounds and large motor assemblies, Punch subwoofers deliver deep, loud, aggressive bass--not to mention stunning cosmetics that you'll want to show off. For over 20 years, Punch subwoofers have shown the world that big bass, extended power handling and awesome cosmetics need not cost a fortune. One listen and you'll know why it's called The PUNCH.P1S4-10 FeaturesPunch subwoofers deliver deep, loud, aggressive bass and feature flex fit baskets for easy adjustments when mounted.Anodized aluminum voice coil formers provide excellent heat dissipation.Speaker ConstructionCustom 10-AWG nickel plated push terminalsExtended pole piece and bumped vented backplateHigh-temp voice coil with spun-laced Nomex re-inforcement collarKevlar fiber reinforced paper coneLinear spider with embedded 16 AWG tinsel leadsProtective PVC textured magnet coverSoft touch ABS trim ring with optional grilleStampCast basket with integrated spider ventingAnodized Aluminum Voice Coil FormerRockford Fosgate subwoofers use anodized aluminum voice coil formers that provide superior heat dissipation (up to 100° at full power levels). Unlike traditional plastic substitutions, aluminum acts like a heat-sink to quickly dissipate thermal build-up on the voice coil. This keeps subwoofers cool during high SPL conditions.CEA-2031Power handling on Rockford Fosgate speakers conform to CEA-2031 industry standards. This means your speaker has the capacity to handle power under continuous damand, not instantaneous power handling, that over time, can damage voice coils.Flex Fit BasketThe Flex Fit frame utilizes slots (where feasible) instead of single screw sized holes. This allows slight adjustment of the speaker when mounted.Stitched Tinsel LeadsMultipoint "periodic" stitched lead wire technique reduces the mass of each tinsel lead and spreads stress and strain over a greater area, significantly improving the reliability and performance of the subwoofer.These stitched tinsel leads withstand extreme duty cycles, fatigue and high current that is critical to robust design.About Rockford FosgateSetting the standard for excellence in the audio industry, the Rockford Corporation markets and distributes high-performance audio systems for the mobile audio aftermarket and OEM market. Headquartered in Tempe, Ariz., Rockford Corporation is a publicly traded company and manufactures its products under four brands: Rockford Fosgate, Rockford Acoustic Design, Lightning Audio and InstallEdge.com.P1S4-10 SpecificationsSize:10 InchesImpedance:4-OhmPower Handling:250 Watts RMS 500 Watts MaxVoice Coil Diameter:2.0 InchesMagnet Weight:40 oz.Speaker Connector:Dual 10 AWG compressionSPL(1w/1m):85 dBWoofer Displacement:0.043" cu. ft (1.22 Liters)Cutout Diameter:9.125 inchesMounting Depth:5.33 inchesWhat's in the BoxRockford Fosgate Punch P1 P1S4-10 10-Inch Subwoofer (4 Ohm), Trim Ring, Installation Hardware, User's Manual