The TS85 subwoofers have a cast aluminum basket for strength and durability as well as a black anodized aluminum cone with a laser etched MTX Audio gothic logo. Point blank, they sound as good as they look. They are perfect for any ride from a rusted out Riviera to a bangin' Bentley and they will make you the envy of the neighborhood. TS55 subwoofers rely on a stamped basket and incorporate a painted gloss black metallic polypropylene dust cap with a raised MTX Audio gothic logo for good looks and high quality.