Alpine S2-W10D4 10" Subwoofer w/ S2-S50 5.25" & S2-S40 4" Coaxial Speakers

Strontium ferrite magnet. Alpine S-Series S2-W10D4 10" Component Subwoofer with S2-S50 5.25" and S2-S40 4" Coaxial Speakers. 5.25" woofer with 3/4" coaxial tweeter. Alpine S2-W10D4 Component Subwoofer.

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