Pure Silk Dome 3/4" Tweeter and Neodymium Magnet delivers smooth and accurate treble reproduction (S-3502 and S-4602 use a PEI tweeter?? S-6903 uses PEI tweeter and mid; S-275CF is dual cone)</br>2-layer Paper?? DDC Cone (Dynamic Damping Coating) reduces distortion while adding UV protectio"br>Double Pressed?? UV Treated Foam Surround provides accurate and distortion free audio replication</br>Non-resonant Basket Acoustically dampened treated steel basket</br>EFF Motor Structures (Efficient Flux Field) will ensure louder sound reproduction with lower power input</br></br>Product Description</br></br>Since their introduction nearly 8 years ago?? our S-Series coaxial have made a name for themselves with avid music fans the world over. So how do you improve on a winner? As the saying goes?? if it isn't broke?? don't fix it! So we focused on a few key points while leaving the rest intact. The result is our new and improved S-Series coaxials. Without question a fantastic replacement for most OEM speaker applications?? the S-Series speaker systems continue to offer great performance at a great price. This range offers a complete line-up specifically sized for OEM drop-in replace