In Phase Car Audio USW300 300W Underseat Ultra Slim Compact Active Subwoofer of This sub has a damping material built into its cone and spider to ensure a rattle-free performance and deep bass Heavy duty durable construction – Die Cast Aluminium Chassis – no plastic structure here.
JBL STAGE 800BA Car 8 Ported Powered Built In Amp Subwoofer Enclosure 200W JBL STAGE 800BA Car 8 Ported Powered Built In Amp Subwoofer Enclosure 200W.