Black Diamond DIA-CARBON15.1D 15" Carbon Fiber High-Excursion Subwoofer — 3500W RMS - 7000W MAX, 2-Ohm DVC, Competition-Grade Pro Audio

Built for extreme SPL and serious low-end impact, the Black Diamond DIA-CARBON15.1D is a 15" high-excursion subwoofer rated to handle 3500W RMS and 7000W MAX. Its 2-Ohm DVC configuration supports high-power competition systems and flexible wiring options for SPL-focused builds. Advanced motor assembly and cooling deliver both efficiency and control: a 425 Oz ferrite magnet is paired with a 3.5" aluminum voice coil and a rigid carbon fiber cone to move massive air without distortion. The design includes spider-crossed leads and enhanced heat dissipation to maintain reliability during prolonged, high-power use. Designed for precision and impact, the subwoofer’s Thiele/Small parameters include a Qts of 0.78, Xmax of 22.5mm, and Fs of 38Hz. It reproduces subsonic lows down to 25Hz and works well in sealed or ported enclosures sized between 2.5–4 ft³. For ported builds the recommended port tuning (Fb) is 32Hz. Durability and installation-friendly hardware: a lightweight, ultra-rigid carbon fiber cone and dust cap, an aluminum black basket, high-strength foam surround, and 4-gauge push terminals. With a 15.5" total diameter and a shallow 10.9" mounting depth, this driver fits most standard 15" enclosures and is optimized for aggressive installs. In short, the DIA-CARBON15.1D combines competition-grade power handling and construction to deliver tight, earth-shaking bass for SPL enthusiasts and professional pro-audio applications.