--> <div class="product-block product-description float-start w-100">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 “Active” version, ST 25A Neo provides tweeter only.</div> <h4><span style="color: #ff6600;">Technical Specs</span></h4> <table class="table caption-top"> <tbody> <tr> <td><strong>Component</strong></td> <td>HIGH EFFICIENCY COMPRESSION DRIVER</td> </tr> <tr> <td><strong>Size</strong> mm (in.)</td> <td>44 (1.8)</td> </tr> <tr> <td><strong>Power Handling – Peak</strong> W</td> <td>100</td> </tr> <tr> <td><strong>Power Handling – Peak Note</strong></td> <td>Hi-pass filtered @ 5 kHz – 12 dB Oct.</td> </tr> <tr> <td><strong>Impedance</strong> Ohm</td> <td>4</td> </tr> <tr> <td><strong>Voice Coil Ø</strong></td> <td>25 (1)</td> </tr> <tr> <td><strong>Frequency Response</strong> Hz</td> <td>3k ÷ 20k</td> </tr> <tr> <td><strong>Weight of one component</strong> kg (lb.)</td> <td>0,39 (0.86)</td> </tr> <tr> <td><strong>Magnet</strong></td> <td>Neodymium</td> </tr> <tr> <td><strong>Dome</strong></td> <td>Aluminium</td> </tr> </tbody> </table> <table class="table caption-top table--m--ww"> <tbody> <tr> <td><strong>D</strong> mm</td> <td>35,5</td> </tr> <tr> <td><strong>Re</strong> Ohm</td> <td>2,9</td> </tr> <tr> <td><strong>Fs</strong> Hz</td> <td>3900</td> </tr> <tr> <td><strong>Le</strong> mH</td> <td>0,03</td> </tr> <tr> <td><strong>BL</strong> T*m</td> <td>2,05</td> </tr> <tr> <td><strong>Spl</strong> dB</td> <td>107</td> </tr> </tbody> </table> <h4></h4> <h4><span style="color: #ff6600;">Physical Specs</span></h4> <p><a class="float-start mb-3" href="https://static.hertz-audio.com/media/2022/02/ST_35K_NEO.png" data-fancybox="product-physical-specs"><img loading="lazy" decoding="async" class="attachment-full size-full" src="https://static.hertz-audio.com/media/2022/02/ST_35K_NEO.png" sizes="auto, (max-width: 630px) 100vw, 630px" srcset="https://static.hertz-audio.com/media/2022/02/ST_35K_NEO.png 630w, https://static.hertz-audio.com/media/2022/02/ST_35K_NEO-300x194.png 300w" alt="ST 25A NEO" width="630" height="408" /></a></p> <div class="table-responsive-sm"> <table class="table caption-top"> <tbody> <tr> <td><strong>A</strong></td> <td>57 mm</td> <td>2.24 in.</td> </tr> <tr> <td><strong>B</strong></td> <td>43,5 mm</td> <td>1.7 in.</td> </tr> <tr> <td><strong>C</strong></td> <td>55,5 mm</td> <td>2.19 in.</td> </tr> <tr> <td><strong>D</strong></td> <td>29,7 mm</td> <td>1.17 in.</td> </tr> </tbody> </table> </div> <p> </p> <h3><span style="color: #ff6600;">Features</span></h3> <div class="col-md-6 col-sm-12"> <div> <div class="col-md-6 col-sm-12"> <div> <div class="elementor-element elementor-element-d97438a elementor-widget elementor-widget-text-editor" data-id="d97438a" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <div class="elementor-element elementor-element-b6b4ef4 elementor-widget elementor-widget-text-editor" data-id="b6b4ef4" data-element_type="widget" data-widget_type="text-editor.default"> <div class="elementor-widget-container"> <p class="p2"><b>1. </b>Powerful Neodymium magnet providing high performance with compact size.</p> <p class="p2"><b>2. </b>FEM (Finite Element Method) optimized phase-plug and loading horn.</p> <p class="p2"><b>3. </b>CCAR (Copper Clad Aluminium Ribbon) voice coil for unheard-of thermal and mechanical capability ready for an easy replacement with replacement body kit.</p> <p class="p2"><b>4. </b>Extra-light aluminium membrane to maximize SPL with high current, screw terminals.</p> <p class="p3"><b>5. </b>Body waterproofing and anti-UV treatment to allow safe outdoor use without discoloration over time.</p> </div> </div> </div> </div> </div> </div> </div> </div> <h1 class="col-8"><span style="color: #ff6600;"><a class="col-md-6 col-sm-12 mb-3" href="https://static.hertz-audio.com/media/2021/04/SPL_SHOW_NEO_ICON_web-1.png" data-fancybox="product-technologies-0"><img loading="lazy" decoding="async" class="attachment-full size-full" src="https://static.hertz-audio.com/media/2021/04/SPL_SHOW_NEO_ICON_web-1.png" sizes="auto, (max-width: 800px) 100vw, 800px" srcset="https://static.hertz-audio.com/media/2021/04/SPL_SHOW_NEO_ICON_web-1.png 800w, https://static.hertz-audio.com/media/2021/04/SPL_SHOW_NEO_ICON_web-1-300x73.png 300w, https://static.hertz-audio.com/media/2021/04/SPL_SHOW_NEO_ICON_web-1-768x187.png 768w" alt="ST 25A NEO" width="800" height="195" /></a></span></h1> <div class="col-md-6 col-sm-12"> <div class="product-tab-title-sub">NATURE PROOF</div> <div> <p>Compact and lightweight, the new spl neo systems are extremely loud and do not fear nature elements for an unlimited fun in every condition!</p> <p> </p> </div> </div> <h1 class="col-8"><span style="color: #ff6600;"><a class="btn btn-pdf" style="color: #ff6600;" href="https://www.audiofile-incar.co.uk/wp-content/uploads/2024/09/Hertz-SPL-Show-ST-25A-NEO.pdf">Tech Sheet</a></span></h1> <p> </p> <p> </p> <p> </p> <!-- 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 “Active” version, ST 25A Neo provides tweeter only. Technical Specs Component HIGH EFFICIENCY COMPRESSION DRIVER Size mm (in.) 44 (1.8) Power Handling – Peak W 100 Power Handling – Peak Note Hi-pass filtered @ 5 kHz – 12 dB Oct. Impedance Ohm 4 Voice Coil Ø 25 (1) Frequency Response Hz 3k ÷ 20k Weight of one component kg (lb.) 0,39 (0.86) Magnet Neodymium Dome Aluminium D mm 35,5 Re Ohm 2,9 Fs Hz 3900 Le mH 0,03 BL T*m 2,05 Spl dB 107 Physical Specs A 57 mm 2.24 in. B 43,5 mm 1.7 in. C 55,5 mm 2.19 in. D 29,7 mm 1.17 in. Features 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. NATURE PROOF Compact and lightweight, the new spl neo systems are extremely loud and do not fear nature elements for an unlimited fun in every condition! Tech Sheet
