Hertz ST 25
High Efficiency Compression Driver
Extremely compact size for explosive performance: ST 25 is the first Hertz car audio compression driver specifically designed for SPL competitions. The 25 mm ST 25 with CCAR (Copper Clad Aluminium Ribbon) voice coil features an extra-light aluminium membrane with high thermal dissipation. An extremely powerful neodymium magnet is employed along with a highly efficient compression loading horn, designed for maximum high frequency acoustic pressure.