SB Acoustics SB20PFC-00 Passive Radiator

The SB20PFC-00 Paper Passive Radiator from SB Acoustics is a meticulously engineered component designed to elevate the performance of your loudspeaker projects. By replacing a conventional port, this passive radiator enables deep, controlled bass extension while eliminating the turbulence and chuffing noises often associated with ported enclosures. It is an ideal solution for compact speaker designs where space is at a premium, allowing you to achieve a more natural, room-filling low-end response without the need for a larger cabinet.

This unit is particularly well-suited for use in high-fidelity bookshelf speakers, subwoofer systems, or custom audio installations where precise bass tuning is essential. Its 20 Hz resonance frequency ensures it can reproduce the lowest musical notes with authority and clarity, making it a perfect partner for a dedicated woofer in a two-way or multi-way design. The passive radiator’s large 216 cm² cone surface area (Sd) and compliant suspension (Cms of 0.83 mm/N) work together to move significant air volume, delivering impactful yet accurate bass.

Technical excellence is at the core of this SB Acoustics PFC Paper series component. With a nominal diameter of 202 mm and a mounting hole diameter of 4.3 mm, it fits standard driver cutouts. The mechanical Q (Qms) of 6.8 and low mechanical losses (Rms of 1.4 kg/s) ensure efficient energy transfer and controlled damping. Eight mounting holes provide secure installation, while the paper cone material offers a natural, well-damped sound character. This passive radiator is a refined choice for audiophiles and builders seeking to optimise bass performance with precision and elegance.