SB Acoustics SB16PFCR-00 Passive Radiator

The SB16PFCR-00 from SB Acoustics is a meticulously engineered 6-inch passive radiator designed to elevate the low-frequency performance of your loudspeaker system. By replacing a conventional port, this passive radiator delivers deeper, more controlled bass extension without the turbulence and chuffing noises often associated with ported enclosures. It is an ideal solution for compact speaker designs where maximising internal volume is critical, or for sealed enclosures seeking to extend their low-end response with minimal compromise.

Featuring a lightweight paper cone and a durable rubber surround, this passive radiator offers a natural, articulate sound character. Its key technical specifications include a resonance frequency (Fs) of just 22 Hz, a mechanical Q factor (Qms) of 4.4, and a maximum linear excursion (Xmax) of 5 mm, ensuring it can handle substantial displacement while maintaining linearity. The suspension compliance (Cms) of 1.4 mm/N and mechanical losses (Rms) of 1.2 kg/s further refine its behaviour, allowing seamless integration with an active driver. With a nominal diameter of 152.4 mm and a cut-out diameter of 144.5 mm, it is straightforward to mount using its four fixing holes. Whether you are upgrading an existing design or building a new high-fidelity system, the SB16PFCR-00 provides a refined, low-distortion path to deeper bass.