Extremely compact size for explosive performance: ST 25 is the first Hertz tweeter 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.

Features

1. High magnetic permeability plates provide constant, even flux.
2. Neodymium magnet, for top SPL performance.
3. CCAR (Copper Clad Aluminium Ribbon) voice coil; for unheard-of thermal and mechanical capability.
4. Extralight aluminium membrane.
5. Anodized aluminium body; for maximum damping and vibration rejection.
6. High current, screw terminals.
7. High efficiency compression loading horn. 

Specifications

• Component High Efficiency Compression Driver
• Size mm (in.) 25 (1)
• Power handling: W peak 100 | W continuous Hi-pass filtered @ 5 kHz - 12 dB Oct.
• Impedance Ω 4
• Frequency response Hz 3k ÷ 20k
• Sensitivity dB/SPL 107
• Voice coil Ø mm (in.) 25 (1)
• Magnet Neodymium
• Dome/Cone Aluminium
• Weight of one component kg (lb) 0,52 (1.1)