HERTZ by Elettromedia

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NEO line bullet tweeters are a totally new project, lighter and more compact compared to the previous ST 25 and with superior performance thanks to the use of Neodymium N38 H for the motor units and a FEM (Finite Element Method) optimized driver/horn design. The “Kit” version, ST 25K Neo features metallic mesh grille and inline crossover filter included. 

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Data table

Size mm (in.) 44 (1.8)
Power Handling - Peak W 100 Hi-pass filtered @ 5 kHz - 12 dB Oct.
Impedance 4
Frequency response Hz 3k ÷ 20k
Sensitivity dB SPL 107
Voice coil Ø mm (in.) 25 (1)
Magnet Neodymium
Cone/Dome Aluminium


1. Powerful Neodymium magnet providing high performance with compact size.

2. FEM (Finite Element Method) optimized phase-plug and loading horn.

3. CCAR (Copper Clad Aluminium Ribbon) voice coil for unheard-of thermal and mechanical capability ready for an easy replacement with replacement body kit.

4. Extra-light aluminium membrane to maximize SPL with high current, screw terminals.

5. Body waterproofing and anti-UV treatment to allow safe outdoor use without discoloration over time.

6. “Kit” version with metallic mesh grille and inline crossover filter included.

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