HiVi L6-4R 6-Inch Kevlar Cone Woofer — Includes Install Kit

HiVi L6-4R 6 Inch Woofer — With Installation Kit. The HiVi L6-4R is engineered to solve a common issue in speaker design: aggressive top-end cone breakup. By combining woven Kevlar fibers with a specific paper damping compound, this 6-inch driver provides the lightning-fast transient response and structural stiffness of Kevlar while retaining a remarkably smooth, well-behaved top-end roll-off. The mirror-black phase plug improves high-frequency dispersion and mid-band transparency. This design keeps the critical midrange clear, detailed, and phase-coherent, allowing for simpler, lower-order crossover configurations. The muted bluish color of the Kevlar material with the black phase plug give a really nice overall appearance. The woofer is built on a cast aluminum basket that provides maximum frame rigidity while keeping rear-wave reflections to a minimum. It has a fully shielded ferrite magnet system, making it safe for placement near sensitive electronics and home theater systems without magnetic interference. With an Fs of 50 Hz and a 4.3mm linear Xmax, the L6-4R delivers clean, impactful bass response down to 49 Hz in a modest 12-liter (0.42 cu ft) vented enclosure. To save you a trip to the hardware store, we include a custom-matched Installation Kit at no extra charge so you can start building immediately. Each L6-4R woofer you buy comes with a pre-cut gasket, two gold plated quick connect terminals, and mounting screws for free. Highlights Kevlar-Paper Composite Cone and Phase Plug: Delivers high rigidity and low mass for fast transients, with a phase plug that optimizes off-axis dispersion. Forgiving Crossover Behavior: Smooth, natural frequency roll-off from 2kHz to 3kHz with negligible cone breakup simplifies network design. Premium Quality: Built with a cast aluminum frame and a high-temperature Kapton voice coil former for consistent thermal handling. Complete Installation Kit Included: Ships with the exact matching mounting screws and quick-connect wire terminals needed to start your build immediately. HiVi L6-4R Specifications Specification Value Brand HiVi Model L6-4R Nominal Diameter 6 Inches Cone Material Woven Kevlar Impedance 4 Ohm Power Handling (RMS) 35 watts Power Handling (MAX) 70 watts Sensitivity 88dB (2.83v/1m) Frequency Response 49 - 3500 Hz Outside Diameter 170mm (6.7 inches) Cutout Diameter 147mm (5.8 inches) Mounting Depth 96mm (3.78 inches) Weight 4.0 pounds Thiele-Small Parameters Parameter Value Resonant Frequency (Fs) 50 Hz DC Resistance (Re) 3.6 Ω Compliance Eq. Volume (Vas) 0.52ft³ Mechanical Q (Qms) 3.856 Electrical Q (Qes) 0.443 Total Q (Qts) 0.40 BL Product (BL) 6.0 T·m Maximum Linear Excursion (Xmax) 4.3 mm Effective Cone Area (Sd) 133 cm²