Hertz SX300D SPL Show 12 inch Subwoofer (£349.99) - Adam Rayner Talks Audio
Amazon.com: HERTZ SPL Show Series Bundle with One Pair of ST 25A NEO Compression Tweeters and One Pair of SV 165 NEO 6.5" Midrange Drivers : Electronics
Hertz SPL Show SX 690 NEO SPL Show Series 6"x9" 3-way car speakers — built for SPL competition at Crutchfield
Subwoofers - Hertz car audio systems | The Sound Experience