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Hertz

SPL Show ST 25A Neo.2

Horn tweeter

169,00€
169,00€ 169,00€
incl. VAT , possibly plus shipping

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Highlights

  • Lightweight, compact design, N38 H neodymium magnet, 4 ohm impedance.
  • Optimized phase plug, loading horn, aluminum membrane.
  • 100 W peak power, 3k-20k Hz frequency response, 107 dB SPL.
Seen more cheaply Personal Offer
brand: Hertz
Delivery time:
Available, in 3-8 days with you
Number:
Couple
Watt RMS:
50
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Discover the SPL Show ST 25A Neo.2, the latest horn tweeter from the renowned Hertz brand. This innovative model impresses with its lightness and compactness compared to the predecessor model ST 25. Thanks to the use of N38 H neodymium for the motor units and a FEM-optimized driver/horn design, it offers excellent performance. Particularly noteworthy is the "active" version - the ST 25A Neo, which is designed exclusively as a tweeter. With a high-performance neodymium magnet, optimized phase plug and loading horn, as well as lightweight aluminum membranes, this model sets new standards in terms of sound power and quality.

Technical Data

  • Size mm 44
  • Load Capacity - Peak W 100
  • Load capacity - Peak note high-pass filtering @ 5 kHz - 12 dB Oct.
  • Impedance Ohm 4
  • Oscillating coil Ø 25
  • Frequency response Hz 3k - 20k
  • Weight kg 0.39
  • Neodymium Magnet
  • Dome Aluminum

Electro-Acoustic Specifications

  • D mm 35.5
  • Re Ohm 2.9
  • Fs Hz 3900
  • The mH 0.03
  • Bl T*m 2.05
  • Spl dB 107

Physical Specifications

SPL Show ST 25A Neo.2

  • A 57 mm
  • B 43.5 mm
  • C 55.5 mm
  • D 29.7 mm

Frequency response

SPL Show ST 25A Neo.2

FEATURES

  • Powerful neodymium magnet with high performance and compact size.
  • FEM (Finite Element Method) optimized phase connector and charging horn.
  • CCAR-Swing Coil (Copper Clad Aluminium Ribbon) for unheard thermal and mechanical capabilities, ready for an easy replacement with a replacement body kit.
  • Extra-light aluminum membrane for maximizing sound pressure level with high current screw terminals.
  • Body impregnation and anti-UV treatment to allow safe outdoor use without discoloration over time.
The SPL Show ST 25A Neo.2 from Hertz offers impressive performance data. With a power handling capacity of up to 100 watts, measured at peak, and a high-pass filter at 5 kHz - 12 dB per octave, it ensures that you receive clear and undistorted sound quality even at high volumes. The frequency response ranges from 3000 Hz to 20,000 Hz, making this tweeter ideal for high-frequency audio signals. Thanks to an impedance of 4 ohms and a sound pressure level (SPL) of 107 dB, this tweeter can achieve outstanding volumes with low energy consumption.
The SPL Show ST 25A Neo.2 from Hertz is characterized by its high-quality construction. It uses a powerful neodymium magnet that delivers maximum power despite its compact size. The aluminum diaphragm is extremely lightweight, contributing to the maximization of the sound pressure level. Additionally, the design is FEM-optimized to enhance the acoustic performance of the phase plug and horn loading. With an electromechanical specificity of Bl T*m 2.05 and an FS of 3900 Hz, the tweeter is designed to ensure excellent reproduction quality and reliability.
The physical specifications of the SPL Show ST 25A Neo.2 by Hertz are designed for a compact construction. Its dimensions are 44 mm in size with a housing depth of 29.7 mm. The width and height are also adjusted to fit into a variety of audio configurations: A measures 57 mm, B 43.5 mm, C 55.5 mm. These measurements make it extremely flexible for integration into different installation situations, especially in vehicles where space is often limited.
The SPL Show ST 25A Neo.2 from Hertz is equipped with high-quality materials. The main materials include the aluminum membrane, which combines lightness and durability, ideal for achieving high sound pressure with minimal weight. The neodymium magnet N38 H offers extreme power density and is crucial for the compact design of the tweeter. A CCAR voice coil made of copper-clad aluminum ribbon enhances thermal and mechanical capabilities, while the body impregnation and anti-UV treatment provide additional protective layers against environmental influences.
The SPL Show ST 25A Neo.2 from Hertz offers many remarkable acoustic properties. The frequency response ranges from 3 kHz to 20 kHz, ideal for a multifaceted high-frequency reproduction. The tweeter achieves a sound pressure level of 107 dB, ensuring intense volume. The electromechanical impedance is 2.9 Ohms, and the inductance is only 0.03 mH, which together ensure minimal energy loss during sound conversion. This spectral bandwidth and efficiency are crucial for users who desire the highest performance with great acoustic clarity.
The SPL Show ST 25A Neo.2 from Hertz is generally compatible with a variety of vehicle models due to its compact dimensions of 44 mm, although no specific brands are mentioned in the description. The housing depth of 29.7 mm facilitates installation in tighter spaces, as found in many modern cars. Installation is further eased by the weight-saving design of only 0.39 kg, meaning that no compromises in weight need to be made when placing it in hard-to-reach areas.
When integrating the SPL Show ST 25A Neo.2 from Hertz into an existing audio system, the specific connection requirements should be observed. The tweeter is designed for easy connection and features high-current screw terminals that allow for quick and secure installation. Adequate high-pass filtering at 5 kHz - 12 dB/octave must be set up to fully exploit the performance potential and to avoid distortion at high frequencies. The 4-ohm impedance should also be taken into account when connecting to amplifiers or crossovers.
The FEM optimization (Finite Element Method) of the SPL Show ST 25A Neo.2 by Hertz significantly improves sound quality. Through FEM analysis, acoustic deformations in the design of the phase plug and the loading horn are minimized, contributing to the maximization of sound efficiency. This optimization ensures a directed sound wave that reduces the scattering of unwanted frequencies. This results in a clearer, more focused sound image, which plays a crucial role especially at high volumes and in acoustically challenging environments.
The SPL Show ST 25A Neo.2 from Hertz benefits from a high-quality aluminum diaphragm. This allows for extreme smoothness and yet strength, resulting in excellent sound pressure. Aluminum has been chosen for its efficiency in sound reproduction at high stability, which means you get thermal resistance that counteracts unwanted distortions at high levels. In addition to acoustic performance, the aluminum diaphragm also contributes to the overall durability of the tweeter, especially in outdoor applications due to the impregnation and anti-UV treatment of the housing.
The CCAR voice coil (Copper Clad Aluminium Ribbon) in the SPL Show ST 25A Neo.2 by Hertz is central to its thermal and mechanical performance. By using a copper coating on aluminum, the coil can handle high power loads while remaining lightweight, optimizing overall performance. This combination also allows for excellent heat dissipation, crucial for operation at high volumes over extended periods without the risk of thermal failure. The voice coil also offers flexibility, as it can be easily replaced with spare parts if needed.

Elettromedia SpA
62018 Potenza Picena (MC)
Strada Regina km 3,500
Italy

Contact person:
Simone Iampieri
Executive Director Assistant
T +39 0733 870 813
Elettromedia SpA
62018 Potenza Picena (MC) Italy
Strada Regina km 3,500
T + 39 0733 870 870

Contact: simone.iampieri@elettromedia.it

Product Specifications

Manufacturer

Hertz

Product type

Horn tweeter

Features

  • Highlights

    • Lightweight, compact design, N38 H neodymium magnet, 4 ohm impedance.
    • Optimized phase plug, loading horn, aluminum membrane.
    • 100 W peak power, 3k-20k Hz frequency response, 107 dB SPL.

  • Uvp

    184

weight

0.39 kg

Watt RMS Load Capacity

50

configurators

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Your advantages with Masori

Buy online at a great price: Hertz SPL Show ST 25A Neo.2 tweeter with top performance

The Hertz SPL Show ST 25A Neo.2, a revolutionary tweeter, combines ultra-lightweight construction with uncompromising performance. Weighing just 0.39 kg, this model impresses with its compact size and powerful neodymium magnet. The optimized Fem method used to design the driver and loading horn ensures excellent acoustic performance. Benefit from the Masori Lowest Price Guarantee and secure this tweeter at unbeatable conditions. Thanks to its 107 dB SPL, the tweeter maximizes sound pressure and enables the finest sound details. Discover the difference and buy now at masori.de.

High power consumption and frequency response: optimal sound for every application

The Hertz SPL Show ST 25A Neo.2 features a peak power handling of 100 W, allowing it to operate reliably even under higher power requirements. A high-pass filter at 5 kHz with 12 dB per octave ensures flawless sound separation. This maintains a stable frequency response from 3 kHz to 20 kHz, ideal for precise highs and complex soundstages. The tweeter guarantees crystal-clear sound across a wide spectrum, making it ideal for any in-vehicle application. This frequency range ensures that every detail in music is audible, which could lead to a loss of transparency at higher frequencies.

Efficient impedance of 4 ohms for ideal use in car hi-fi systems

The 4 ohm impedance of the SPL Show ST 25A Neo.2 offers a balanced blend of efficiency and control. This value is specifically designed for compatibility with various amplifiers, allowing flexible integration into your existing car hi-fi system when lower ohm values ​​would place higher demands on the amplifier. Current flow remains optimized, ensuring that both sound quality and performance are uncompromised. This perfectly matches common amplifier and amplifier systems on the market, as it avoids overvoltages and resistance spikes.

Thiele-Small parameters for optimal use and design

The Hertz SPL Show ST 25A Neo.2 tweeter features detailed Thiele-Small parameters, which were required for its performance and Design Verified. Its Fs value (3900 Hz) demonstrates that the driver is optimized for precise and effective controlled motion, which could cause distortion at lower Fs. Furthermore, the Bl value of 2.05 T*m provides the stability and precision necessary at higher power levels to avoid distortion.

Lightweight aluminum membrane for maximized sound pressure

Equipped with an ultra-lightweight aluminum cone, the tweeter sets new standards in sound pressure. The cone enables lightning-fast movements without compromising sound quality, which is often the case with heavier materials. The material supports fine detail in the upper frequency range and prevents distortion. This lightweight material ensures that the sound pressure level is maximized, giving the overall sound clarity and richness. Aluminum is optimal for rapid frequency changes that would otherwise be impossible to achieve with heavier materials.

Advanced voice coil and accessories for high performance

The tweeter is equipped with a 25 mm CCAR (Copper Clad Aluminum Ribbon) voice coil, which offers excellent thermal and mechanical properties. This construction contributes to the system's durability and high thermal tolerance. Thanks to the special design of the CCAR voice coil, the tweeter is equipped for intense audio reproduction, and high-current screw terminals support maintenance-friendly installation. Another practical feature is the easy option of a replacement body kit, which significantly extends the lifespan of the system.

Fem-optimized structure for superior sound quality

The SPL Show ST 25A Neo.2 features an FEM (finite element method) optimized phase plug and load horn design. This technical refinement ensures clarity and precision at high frequencies, avoiding unwanted resonances. With precise geometric structuring, this design supports the linear movement of the diaphragm and ensures coherent, harmonious sound reproduction. The advantage of an FEM-optimized design lies in the uncompromising sound, eliminating any unnecessary distortion.

Outdoor-friendly properties thanks to special impregnation

Thanks to the body impregnation and a special anti-UV treatment, the Hertz SPL Show ST 25A Neo.2 is perfectly suited for outdoor applications. This impregnation prevents external influences such as moisture or UV light from affecting the structure or performance over time. These measures eliminate potential aging processes and ensure consistent sound quality in every application scenario. The UV-resistant finish ensures that no discoloration occurs, preserving excellent sound even in unpredictable weather conditions. Ideal for open-top vehicles such as convertibles or SUVs. On-site installation in Frankfurt (Oder) and help , as well as the comprehensive audio blog offer you valuable support with your purchase and installation.