Main Content
Discontinued Product
View all Car Tweeters

Hertz High Efficiency Compression Driver 1" Tweeter - ST 25

Quick Specs
  • Color : Black
  • RMS Power Handling : 50
  • Impedance (ohms) : 4
  • Size (inches) : 1
  • Type : Tweeter
What We Offer
Free Shipping on most orders over $35
Low Price Guarantee
Free Tech Support
  • Product Overview-

    Key Features

    • 100 W Peak
    • Specifically Designed For SPL Competitions
    • Copper Clad Aluminum Ribbon
    • Neodymium Magnet
    • Black Finish

    Hertz High Efficiency Compression Driver 1" Tweeter, Model ST25

    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.


    • High magnetic permeability plates provide constant, even flux
    • Neodymium magnet, for top SPL performance
    • CCAR voice coil; for unheard-of thermal and mechanical capability
    • Extralight aluminum membrane
    • Anodized aluminum body; for maximum damping and vibration rejection
    • High current, screw terminals
    • High efficiency compression loading horn


    • Configuration High Efficiency Compression Driver
    • Tweeter Diameter 1"
    • Frequency Response 3kHz - 20kHz
    • Nominal Impedance 4-Ohm
    • Power Handling (RMS)
      • Hi-pass filtered @ 5kHz - 12 dB Oct. 
      • 100 Watts MAX
    • Sensitivity (dB @ 1 watt/1 meter) 107 dB
    • Magnet Neodymium
    • Dome/Cone Aluminum

    Approximate Weight

    • Shipping: 1 lb

    Warranty Information:

    • Manufacturer Warranty (authorized online retailer): One Year Parts & Labor
    California customers: Proposition 65 WARNING
  • Specifications+
  • Guides & Documents+
  • From The Manufacturer+


Add more to compare

What Our Customers Say About Us

See All Customer Testimonials
  • I love it when companies make things easy for the customer - from the speed of replies to the clarity of product features, pricing to timely updates along the way. Abt always delivers - they did it again this time. Bravo!
    May 9, 2020 - Joe R.
Save more when you shop outlet items.
Outlet items are currently available for local customers only. For more information, please contact an Abt sales specialist: