CSS APR12 Passive Radiator

The CSS APR12 Passive Radiator is a high-quality component engineered to elevate the low-frequency performance of your speaker system without the need for a ported enclosure. By replacing a conventional bass reflex port, this passive radiator allows for deeper, more controlled bass extension, making it an ideal solution for compact cabinet designs where space is at a premium. Whether you are building a custom subwoofer, upgrading a bookshelf speaker, or refining a high-end audio project, the APR12 integrates seamlessly with active drivers to deliver a cleaner, more impactful low end.

Technically, this radiator boasts a 304.8 mm nominal diameter and a resonance frequency of just 25 Hz, ensuring impressive depth. Its mechanical Q (Qms) of 7 indicates a well-damped suspension system, while the equivalent volume (Vas) of 156 litres provides flexibility in enclosure tuning. The cone area (Sd) of 505 cm² and a moving mass (Mmd) of 94 grams contribute to efficient energy transfer and robust output. With a suspension compliance (Cms) of 0.48 mm/N, the APR12 offers precise control and linearity. Ideal for audiophiles and DIY enthusiasts, this passive radiator is a reliable choice for achieving authoritative, room-filling bass in a variety of speaker configurations.